Patent Publication Number: US-7588087-B2

Title: Helicopter water bucket improvements

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The invention relates to a firefighting bucket assembly to be suspended from an aircraft and preferably filled from an open body of water, ie. from a lake. 
   2. Prior Art 
   From U.S. Pat. No. 3,661,211 Powers is known for a collapsible fire fighting bucket, which could be filled by immersion in a lake. 
   The bucket framework which supported its pliable side walls had four normally upright but collapsible supports connecting a rigid upper peripheral frame member to a ridged circular bottom. The water level being controlled by spill ports to adjust overall bucket weight to match the lifting capabilities of the aircraft. Two hydraulically operated doors released the water. When collapsed the bucket was bulky, difficult to transport, additionally the water release mechanism was heavy and expensive to manufacture. From U.S. Pat. No. 3,572,441 issued to Nodegi describes a flexible bag having a snout like flexible extension which when pulled into the bag from a line entering the top of the bag had to keep the free end of the tubular snout like extension above water. When the line was released the weight of the water inverted the tubular extension thereby releasing the water. When empty the connecting line was made to pull the extension back into the bag where a latching system held it in place. 
   The disadvantages of this system were the discharge port had to be held above the water level of the bag, the length of the extension caused a twisting action which could prevent dumping. In order to refill the bag it had to be transported to a filling station which resulted in loss of time increasing operational costs accordingly. 
   The bucket assembly described in Arney&#39;s CA 1232889 and U.S. Pat. No. 4,474,245 revolutionized aerial firefighting operations. Its simple design, lightweight, its collapsability for storage and transportation, operational superiority over prior art, has redefined aerial firefighting technologies. 
   Arney&#39;s invention has two bucket adjusting means which co-operate with the side wall to adjustably vary the circumference of the bucket. Firstly; bending battens inserted in pockets vertically arranged around the bucket and dimensioned apart peripherally allow the side walls to bulge outwardly to increase capacity in direct relationship to the upward force applied, allowing the operator to match the lifting capability of the helicopter to the overall weight of the bucket. This feature helped eliminate the need for spill ports utilized by Powers in U.S. Pat. No. 3,661,211 or that purpose—Secondly; independently from varing the pulling force as described above to limit bucket capacity Arney introduced an adjustable circumferential tension link. A cinch belt slidably received in belt loops around the bucket&#39;s circumference can be adjusted to limit its capacity. The operator simply adjusts bucket capacity to lifting capability of the helicopter by adjusting the cinch belt in the lockable cinch belt adjuster. 
   The bucket rim was stiffened by overlapping battens strung through belt loops placed around and adjacent to bucket rim. Operationally this proved to be a time consuming awkward task, begging for improvement. 
   Arney&#39;s improvement on Nodegi U.S. Pat. No. 3,572,441 involved sealing the discharge ports of the tubular extension when it&#39;s underwater, upright and under tension from its supporting means. Third flexible tension links, purse lines, alternately affixed through opposing resilient sealing lips closed the discharge port when under tension from the supporting tension link which is adjustably connected to the electro-mechanical control head connector which the operator utilizes to open &amp; close the discharge port for filling and releasing water. 
   Needham&#39;s CA 2,124,166 and U.S. Pat. No. 5,670,429 improved the sealing lip abutment to reduce leakage caused by placing the grommets in the tubular extension adjacent to the resilient sealing lips which eliminated having the purse lines running through the resilient sealing lips, thereby eliminating abrasion to the rather soft resilient sealing lip material. 
   This abrasion increased the tubular extension maintenance factor. The entire tubular extension required removal from the bucket for this servicing, which in many cases required returning the bucket to the manufacturer, transportation and downtime causing additional expense. 
   Despite Needham&#39;s improvements to the sealing lip design further design changes could reduce water leakage through the sealing lips. One problem exists with a kink appearing in the distal end of the tubular extension when it&#39;s under tension from the second flexible link which holds the tubular extension in the underwater upright position. The kinked shape in some cases can be severe, especially if the third flexible tension links are poorly adjusted. The kinking occurs as a result of the third flexible tension links ie, the purse lines being gathered together at the terminal end of the second flexible tension link ie. in the ring to which the purse lines are adjustably connected. The purse lines fan out radially downward from the single collection point ie, the ring, to the dimensionally arranged openings in the tubular extension extending to the essentially horizontal distal ends of the tubular extension. 
   The outermost purse lines under tension are sharply angled upward from the outer ends of the tubular extension toward the collector ring. This generates an inwardly movement of the outermost ends of the tubular extension when under tension from the second flexible tension link, which causes the fold or kink to occur which can effect the proper alignment and abuttment of the sealing lips with potential water loss associated. Larger buckets with wider tubular extensions are more prone to this problem because the angle of the purse lines is increased accordingly at their distal ends. As the purse lines pass downwardly from the second flexible tension link ring through the hub the outermost lines become diverted by the hub increasing the angle and further developing a pronounced kink. The reader is directed to the SEI Industries Ltd. copyrighted Owners Manual produced in April 1999 which pictures both of these problems. 
   One objective of the Rim Opening Device invention is to reduce purse line abrasion on the sealing lips as they pass through the sealing lips similar to Arney&#39;s CA 1232889 and U.S. Pat. No. 4,474,245 submissions. 
   Another objective of the Rim Opening Device invention was to eliminate the central hub which diverts and increases the purse line angle to the collector ring which exacerbates the kink and potential water loss through misaligned sealing lips. 
   Needham&#39;s tubular extension was made narrower at its terminal end than at its base to assist the tubular extensions return to its upright position within the bucket. This change was limited to the smaller buckets only, due to the stiffness associated with smaller tubular extensions. 
   Larger diameter tubular extensions utilized on both medium and large buckets being more flexible were not affected, no change in the straight diameter design was required. 
   Another objective of the Rim Opening Device invention is to make the tubular extensions more flexible to assist the tubular extension&#39;s return to its upright position within the bucket. 
   The aerial firefighting condition can aggressively subject the aerial firefighting bucket to physical damage. Ideally the bucket is allowed to submerge in an open body of water for filling purposes. 
   The operators often find it necessary to scrounge water from any available source ie, shallow ponds, creekbeds, rivers, etc. where all manner of conditions and debris can inflict damage to the bucket. A typical example would be dragging the bucket along a shallow creekbed or river filled with sharp rocks, gravel, mud, uprooted trees, etc. This subjects the buckets upper rim, side walls &amp; bottom of the bucket to aggressive abrasion, which can cause ripping and tearing of the pliable material. It has been found that both debris and bucket suspension lines can get entangled and hung up on the centrally located hub and spoke Rim Opening Device, resulting in lost time to land and re-configure lines and remove debris. 
   Other damage can occur in operational conditions such as impact, hard landings, hangups, emergency release of entire bucket when snagged or hung up. 
   It&#39;s just the nature of the business, however; design changes can mitigate physical damage to the aerial firefighting bucket. 
   Another objective of the Rim Opening Device invention is to totally eliminate the hub and spokes or any structural members centrally located within the bucket, producing a collapsible bucket with a centrally open orifice. 
   The central hub and spoke rim opened device which Needham describes in CA 2124166 and U.S. Pat. No. 5,560,429 can prove to be difficult to deploy on the larger buckets which are constructed of heavier, stiffer materials than their smaller counterparts. 
   The operator must muscle the hub &amp; spoke rim opener into the overcenter position by fighting the stiff action and tightfitting device past center. It is sometimes necessary to utilize a lever to pop it center, when it does so it either quickly jumps out at you or plunges inward, care must be taken in its deployment. 
   Needham also describes in Claim 7 and lines 38 et., of column 4 of the Detailed Description in the above noted patents, a Rim Opening Device. It comprises of a hollow hub centrally located and having a plurality of spokes which have their inner ends hinged from the central hub. They extend radially with their outer ends hinged adjacent the bucket rim and cooperating with the side wall to open and close the bucket somewhat like an umbrella. The spokes being dimensioned such as to allow an overcentering of the hub and spokes slightly above the bucket rim elevation. This device marked a significant improvement over Arney&#39;s upper rim stiffening batten system as described in this CA 1232889 and U.S. Pat. No. 4,474,245. However the umbrella like hub and spoke device is not without shortcomings. 
   Another objective of our Rim Opening Device invention is to improve not only the deployment and collapsibility of the bucket but also operational safety while undertaking these activities in the field of operations. 
   Needham&#39;s bucket mouth held open by a hub and spoke apparatus was a great improvement over the prior art of the time. The distal ends of the spokes dimensionally connected around the rim provide rim support at the connection point which assists the immersion process. However, Needham&#39;s bucket has some tendency to float on the surface prior to immersion. There are two reasons for this phenomenon, firstly; the rim is made of quite flexible material and is not supported between the distal ends of the spokes to which it is connected, the flexible material is pushed upward upon laying down rather than quickly penetrating the surface, secondly; both Arney&#39;s and Needham&#39;s tipping weight systems connects weight shot bags or blocks to the shell of the bucket, somewhat below the rim, their weight distending the shell curvature when laid horizontally on the water. The distended shape forms a shallow hull which promotes floating not submersion slowing the filling process. 
   Another objective of our Rim Opening Device invention was to truly achieve rapid submersion and filling, overcoming the above noted phenomenon by re-enforcing the rim, buttressing the rim circumferentially and by concentrating the tipping weights right at the rim not below it to achieve this objective. 
   A significant problem exists with Needham&#39;s CA2,124,166 and U.S. Pat. No. 5,670,429 umbrella-like bucket opening device which is water loss out of the bucket during flight. Water loss being caused by a constant undesirable flexing of the bucket shell, a repetitive in and out action generated at the bucket&#39;s rim, but transferred throughout the entire bucket disturbing the contained water, and transmitting a harmonic vibration that can sometimes be felt all the way up to the helicopter. 
   Both the deployment cable that lifts the hub into the operational position and the bucket&#39;s suspension lines are under tension from the electro-mechanical control head connector to which they are dually attached. Now the overcentered centrally located hub radially connects the distal ends of the inclined spokes to the perimeter of the bucket shell. 
   As the prior art bucket moves at speed through the air it is buffeted about and disturbed in flight which causes a back and forth transfer of weight on and off the hub. As the tension on the hub abruptly drops so does the hub, only to be violently jerked back up again; up-down, up-down, over and over again generating an undulating pulsing action. 
   As the centrally located hub radially connects the spokes to the bucket rim the up and down movement described above causes the perimeter of the bucket rim to move in and out, over and over again. Over time the rotatably connected spokes, brackets and hub connections become worn; holes elongated, oscillated especially when hollow spokes are utilized, the worn parts co-operate to increase the intensity of the undesirable pulsing and harmonic vibrations. 
   Additionally, because the overcentered hub and upper portions of the inclined spokes are positioned above the bucket&#39;s rim they collide with high speed air during flight, redirecting or deflecting the turbulent air into the mouth of the bucket colliding with the agitated water (provoked by the pulsing, undulating, harmonic vibrations) to generate a spray of water out of the bucket, much like a gale force wind will blow the top of a whitecap at sea. The design and positioning of the umbrella like device propagates water loss out of the bucket during flight. 
   Other objectives of our Rim Opening Device Invention is to create a bucket with superior air flow characteristics which would reduce water loss, eliminate vibrations, pulsing and surging, in general produce superior inflight characteristics which help reduce pilot fatigue. 
   Another objective of this invention was to provide a simple, inexpensive secondary discharge tube which could be utilized by ground crews to manually fill back packs, water storage bags, small tanks, from a bucket slung from under the helicopter. Currently, there are two methods which this writer is familiar with.
     1. an expensive pump system operated by ground crews.   2. a rotatable stiff tube corrected to a through hull rotatable bulkhead fitting the tube extending above the bucket rim when in the upright position, and connected thereto by a quick connector.   

   Our objective would provide a dual purpose secondary discharge hose, one which is sufficiently flexible to eliminate the need for a rotatable fitting. Additionally, the operator can vary the bucket&#39;s capacity by variably connecting the distal end of the hose below the rim on smaller wild fire buckets, eliminating the need to choke the bucket with a cinch strap, which is currently the method. Effectively, this system of adjusting the bucket&#39;s capacity is functional for smaller wild fire buckets only, due to the longer drain down time required for larger buckets. This system would be beneficial to buckets such as the 80-90-100-120 gallon variations where 10-30% drain down times are operationally satisfactory. 
   Another specific objective of this invention was to improve the servicing of the valve in addition to the bucket&#39;s general serviceability. A worst case scenario would be removing a damaged valve during field operations. Two factors make this service operation very difficult on prior art buckets. Firstly; the entire umbrella-like bucket opening device, the central hub, spokes, restrainer cable, and deployment cable must be removed to gain access into the bucket to remove the valve&#39;s circular ring of fasteners The valve is firmly sealed with butyl tape, bonding the valve collar&#39;s resilient material to the bucket shell, Removing the valve, breaking the butyl bond is not only difficult but messy, the butyl compound sticking to anything it touches. Most often breaking this bond results in ripping chunks out of the valve&#39;s resilient sealing collar, with some portions remaining adhered to the shell of the bucket. The torn out chunks of the resilient sealing valve collar must be removed, the butyl compound removed and replaced before the new valve can be installed; it&#39;s a messy and difficult operation. After the new valve has been installed, the central hub, spokes, restrainer cables and bucket deployment cable must now be re-installed. 
   The centrally open top of our “Wild Fire Bucket” invention, resolves the first difficulty, while the valve sealing resilient collar&#39;s design and installation resolves the latter. The improvement being a two piece sealing device each having a resilient collar. The bottom collar is sealed to the bucket shell in the traditional manner with a butyl type compound, while the upper collar is permanently attached to the valve body. A ring of fasteners bring the collars into sealing abuttment. Removing this type of valve is a simple matter. It&#39;s done without disturbing the butyl seal which remains firmly in place during the procedure. The valve can now be replaced by simply turning the bucket upside down and reaching into the bucket. No longer is it necessary to climb into the bucket to change a valve. The new design resolves a long standing service issue. 
   Another servicing problem exists with Prior Art Buckets, when seriously damaged, the bucket shell or body requires opening it up and cutting out ripper, torn, holed, or otherwise damaged panels for their replacement. To do this requires removing the valve from the bucket. Our design improvement now once again allows the valve to be easily removed without damage. Now, the resilient sealing collars have a fabric cover which protects their soft resilient sealing material. The lower collars can be removed from the bucket&#39;s shell or body without being torn or damaged by the butyl sealing compound which resists the removal. The covering saves the lower collar under this servicing. 
   On occasion water bucket equipped helicopters are dispatched to transport emergency supplies to “Wild Fire Ground Crews”, i.e. back packs, tools and equipment, potable water, first aid supplies, emergency heat shield blankets and bags, etc. Water buckets equipped with constricting hubs and spokes require precious time to stuff the cargo in and through the narrow spaces between the hub and spokes but even more time, sensitive life threatening time, to arduously retrieve the previous cargo under extreme operational conditions. 
   Another objective of our Rim Opening Device Invention was to design the bucket mouth centrally open, free of obstructions facilitating efficient emergency cargo transport. 
   However, the single most significant aspect of a centrally open bucket mouth—bar none—is the bucket&#39;s emergency adaptability to extract “Wild Fire Ground Crew” Personnel from harms way. Trapped and encircled by a fire storm, it literally becomes a dire straits emergency life saving platform, the centrally open mouth providing firefighting ground crew emergency access into the bucket for safe extraction. Never in the history of collapsible water bucket design and technology has this life saving feature been obtainable. 
   SUMMARY OF THE INVENTION 
   The invention reduces the difficulties and disadvantages of the prior art by providing an aerial fire fighting bucket to be equipped with a Rim Opening Device which has its open top free of centrally located hubs and spokes which extend radially therefrom to the walls of the bucket. Suspension lines and support cables can on occasion becoming entangled therein. The Rim Opening Device of this invention being a horizontally arranged closed plane, preferably in the form of a closed plane polygon, becomes a circumferential structural member which reinforces the bucket rim from body impact and hazardous operational conditions. This invention, Rim Opening Device, utilizes heavier components on one side of the bucket than on the other side, ie, Brass V/ S  Aluminum. The differing structural shapes and specific gravity quotions provide sufficient weight differential to provide an offsetting tipping action. Bulky weights bolted to the side wall of the bucket, which is the case with prior art, can cause air flow disturbances, suspension line entanglements and leakage. The Rim Opening Device aerodynamics positioning within the bucket adjacent the rim does not deflect and re-direct high speed airflow into the bucket generating water loss as is the case with prior art hubs and spokes which protrude above the bucket rim. Prior art difficulties with abrasion on the resilient sealing lip material caused by purse line travel has been substantially reduced by providing a conformable abrasion cover to the upper portion of the sealing lips above and below the essentially centrally located purse line passageways. However, it is the redesigned shape of the sealing lip portions located below the centrally located purse line passageway through the resilient sealing lips which is the essence of the sealing lip improvement. Sealing lip bulbs have been added to that portion of the sealing lips. 
   When under tension from the purse lines and hydrostatic pressure acting on the tubular extension it straightens out pushing its outward distension caused by the sealing bulbs to push against the sealing bulbs to improve the sealing abutment The bulbs under purse line tension and hydrostatic pressure acting on the tubular extension become compressed and elongated to provide an improved sealing abutment. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     
       FIG. 1 
     
     Is a side elevation of a complete bucket, partially sectioned and fragmented, means of suspension and control, a portion of the dump valve in the fully retracted closed position, in full outline and fragmented in broken outline in the open extended or discharge position, a section of the Rim Opening Device with its lifting strap, first, second and third circumferential tension links, and first, second and third tension links in fragmented and sectional outline. 
     
       FIG. 2 
     
     Is a top plan view of a fully deployed Rim Opening Device equipped fire fighting bucket complete with a second circumferential tension link in full outline, a sectioned second flexible tension link and a complete third flexible tension link connected to a fully retracted closed tubular extension fastened to the bucket body, cables and suspension lines and releasable support being omitted for clarity. 
     
       FIG. 3 
     
     Is a diagrammatic side elevation of a bucket body panel with first, second and third circumferential tension links, first flexible tension link extension and connection means. The side wall panel strip, webbing belt and batten pocket are shown fragmented in broken lines and the mechanical wishbone abrasion cover in full outline. 
     
       FIG. 4 
     
     Is a diagrammatic sectional side elevation of a Rim Opening Device outlining a complete wishbone, partially opened. 
     
       FIG. 5 
     
     Is a top plan view of the Rim Opening Device and bucket rim outline showing transitional development from the fully collapsed state centrally positioned therein, to the second and third stage full development. 
     
       FIG. 6 
     
     Is a diagrammatic end view elevation of a sectioned pair of sealing lips, sealing bulbs, and the distension of the tubular extension around the sealing lip bulbs prior to tension from the third flexible tension link being applied. 
     
       FIG. 7-A 
     
     Is an end view of a round shaped trimming weight affixed to a mechanical wishbone arm. 
     
       FIG. 7-B 
     
     Is a side elevation of a round shaped trimming weight affixed to a mechanical wishbone arm. 
     
       FIG. 8-A 
     
     Is a top plan view of the free end connector shown in full outline, fragmented lines indicating fastener holes for connecting mechanical wishbone arms, not shown, the angle of inclination being depicted with a curved arrow. 
     
       FIG. 8-B 
     
     Is a diagrammatic side elevation in full outline of the free end connector, with passageways for free end rotatable fasteners to connect the mechanical swing arms in the connector swing arm tract. 
     
       FIG. 8-C 
     
     Is a diagrammatic plan view of the free end connector showing the angle of inclination, connector swing arm tract and left hand adjusters, lifting cord passageway and free end rotatable fasteners. 
     
       FIG. 8-D 
     
     Is a sectioned side elevation of a mechanical swing arm depicting both right and left hand adjusters to variably adjust its length. 
     
       FIG. 9 
     
     Is a side elevation of an extractor jump seat affixed to the interior of a Wild Fire Fighting Water Bucket side wall. 
     
       FIG. 10 
     
     Is a fragmented side view of a Wild Fire Fighting Water Bucket with an exploded view of the tubular extension and the lower sealing collar, and the flexible discharge hose. 
     
       FIG. 11 
     
     Is a fragmented side elevation of a prior art tubular extension installation in a Wild Fire Fighting Bucket. 
   

   DETAILED DESCRIPTION 
   
     FIG. 1 
   
   The, Wild Fire Fighting Water Bucket  20 , has a Bucket Body  21 , made of tough pliable material, and has a Rim  22 , which defines the Mouth  23  and the Centrally Open Top  1114 , which facilitates filling from an open body of water, ie. by dipping into a lake. The, Wild Fire Fighting Water Bucket  20 , has a Sidewall  24 , extending downwardly from the Rim  22 , and a Bottom  26 , cooperating with the Sidewall  24 , and having an Opening  28 . A, Tubular Extension  30 , made of pliable material is shown in a retracted position extending upwardly into the Wild Fire Fighting Water Bucket  20 , from the Opening  28 , in the Bottom  26 , and the Free End Of The Tubular Extension  32 , formed into a Discharge Port  35 , to serve as the Dump Valve  36 . In  FIG. 1 , the Tubular Extension  30 , is shown fragmented in full outline in the retracted or raised position, and is also partially shown in the broken outline in an extended or lowered position, extending downwardly from the Wild Fire Fighting Water Bucket  20 , with the Dump Valve  36 , open to permit the discharge of water. 
   The Wild Fire Fighting Water Bucket  20 , assembly also includes the Harness  27 , for suspending the Wild Fire Fighting Water Bucket  20 , from a helicopter Support Line  100 , the Harness  27 , comprising Control Head Connector  38 , which also serves as a connector for connecting to the helicopter (not shown), and connecting a plurality of First Flexible Tension Links  40 , which function as suspension lines, and for releasably connecting to the Second Flexible Tension Link Adjuster Chain  71 , which functions as a adjustable extension for the Second Flexible Tension Link  72 , which functions as a trip line for discharging water. 
   The Control Head Connector  38 , also serves to releasably support the Second Flexible Tension Link  72 , by means of a Spring Reel  56 , and a Trip Mechanism  58 , which is remotely controlled by activating an Electric Solenoid  59 , to selectively hold or release the Second Flexible Tension Link  72 , and Electric Cord  98 , is connected to the helicopter which supplies the required electric current to control loading and discharging water. 
   
     FIGS. 1 and 4 
   
   The Harness  27  also includes a plurality of Lifting Cords  1133 ,  FIG. 4 , (hidden from view  FIG. 1 ) connected to cooperate with the Free End Of Mechanical Wishbones  1103 ,  FIG. 4  of the Rim Opening Device  1100 , the Lifting Cord  1133 , being attached to the Connector Shackle  45 , in such a manner that the First Flexible Tension Link  40 , receives the weight of the Wild Fire Fighting Water Bucket  20 , and it&#39;s water cargo rather than the Rim Opening Device  1100 , or it&#39;s Lifting Cord  1133 . 
     FIGS. 1 ,  3  and  4   
   The plurality of the First Flexible Tension Links  40 , extend downwardly from the Control Head Connector  38 , to be connected to the First Flexible Tension Link Extension  41 , comprising of a Connector Shackle  45 , which connects the Connector Strap  43 , thereto. The Connector Strap  43 , is choke connected to the Upper Connector Loop  44 , a loop sewn into a Webbing Belt  42 , which is sewn to a Sidewall Panel Strip  48 , which is dialectrically welded to the Side Wall Panel  25 , this process creates a Batten Pocket  50 , into which a Batten  52  is latterly inserted. The Webbing Belt  42 , exits the lower end of the Batten Pocket  50 , and is formed into the Lower Connector Loop  46 . 
   The Side Wall Panels  25 , also being dialectrically welded together creating both the Side Wall  24 , and the Bucket Body  21 . The Lower Connector Loops  46 , cooperate with the Third Flexible Circumferential Structural Link  54 , to circumferentially receive a Chain  55 , which is tensioned to partially support the weight of the Wild Fire Fighting Water Bucket  20 , and it&#39;s water cargo. 
   
     FIGS. 1 and 2 
   
   The Second Flexible Tension Link  72 , is releasably connected to the Control Head Connector  38 , by means of the Second Flexible Tension Link Adjuster Chain  71 , its main purpose is to properly tension and vertically adjust the height of the Tubular Extension  30 , when it&#39;s upright and underwater, within the Wild Fire Fighting Water Bucket  20 . Adjusted and tensioned the Second Flexible Tension Link  72 , which functions as a trip line, extends downwardly from the Connector Head  38 , to be connected to the Third Flexible Tension Link  70 , by means of a Connector Ring  73 . The Third Flexible Tension Link  70 , functions as a plurality of purse lines utilized to seal and/or re-seal the Tubular Extension  30  when under tension. The, Tubular Extension  30 , functioning as a Dump Valve  36 . The, Tubular Extension  30 , installation in the Bucket Body  21 , differs significantly from that of prior art installations  FIGS. 10 and 11 . The design modifications greatly improve the servicing and or replacement of the Tubular Extension  30 , within the Bucket Body  21 . 
     FIGS. 1 ,  2 , and  6   
   The, Free End Of Tubular Extension  32 , has an Opening  28 , formed into a resealable Discharge Port  35 , which has a Sealing Lip  60 , extending circumferentially there around to form two opposing sealing lip portions,  FIGS. 1 and 6 , the Front Sealing Lip  62 , and the Opposite Sealing Lip  64 , which are brought into sealing engagement with each other for minimizing water leakage from the Tubular Extension  30 . 
     FIGS. 1 ,  2  and  6   
   The, Tubular Extension  30 , has a plurality of Openings  66 , reinforced with Grommets  68 , the Openings  66 , in the Tubular Extension  30 , are aligned with a corresponding plurality of centrally placed Openings  66 , through the opposing sealing lips, ie, the Front Sealing Lip  62 , and the Opposite Sealing Lip  64 , which cooperates with the Third Flexible Tension Link  70 , ie, the plurality of purse lines, in a straight line downwardly from the Second Flexible Tension Link  72 , (as compared to prior art hubs which divert the lines causing their tubular extensions to be kinked which promotes leakage from their tubular extension). 
     FIGS. 1 ,  2 , and  6   
   The, Third Flexible Extension Link  70 , which functions as a plurality of purse lines enter the Tubular Extension  30 , passing through both sides of the Tubular Extension  30 , and through the Openings  66 , in both sealing lips ie, the Front Sealing Lip  62 , and the Opposite Sealing Lip  64 , terminating in a Ball Stop  74 ,  FIG. 6 , secured to the terminal end of the Third Flexible Extension Link  70 , with a Knot  76 . A Tubular Extension Restrainer  112 , shown in  FIG. 1 , is a line which runs downwardly from the First Flexible Tension Link  40 , i.e. the Connector Shackle  45 , to be connected to the Second Flexible Tension Link  72 , Connector Ring  73 , its purpose is to limit Tubular Extension  30 , travel. 
   
     FIGS. 1 and 6 
   
   A, Tubular Extension Fold Over  106 , at the Free End Of Tubular Extension  32 , forms an Opening  28 , which functions as a Discharge Port  35 , in the Tubular Extension  30 , which functions as a Dump Valve  36 . The, Tubular Extension Fold Over  106 , locates the Distal End Of The Tubular Extension  104 . The, Terminal Edge Of the Tubular Extension Fold Over  108 , is sewn to the side wall of the Tubular Extension  30 , by Stitching  92 . The soft resilient opposing sealing lips, ie, the Front Sealing Lip  62 , and the Opposite Sealing Lip  64 , are pierced with a plurality of Openings  66 , which aligned with the plurality of Grommets  68 , in the Tubular Extension  30 , through which the Third Flexible Tension Link  70 , purse lines, cooperate. A Ball Stop  74 , being located on their terminal ends, and secured by a Knot  76 , to provide an end stop which cooperates with the side wall of the Tubular Extension  30 , to limit purse line travel; and applies pressure, compressing the Sealing Lips  60 , when under tension from the Third Flexible Tension Link  70 . 
   The Sealing Lip  60 , extends circumferentially around the inside of the Tubular Extension  30 , adjacent to the Distal End Of The Tubular Extension  104 , to form two opposing sealing lips, the Front Sealing Lip  62 , and the Opposite Sealing Lip  64 . A single layer of Resilient Sealing Lips material, a soft, resilient, neoprene foam having an Abrasion Cover  1125 , to reduce Third Flexible Tension Link  70 , purse line abrasion is sewn to the Tubular Extension  30  by a single row of Stitching  92  below the Tubular Extension Fold Over  106 . 
   The sealing portion of Sealing Lip  60 , is that portion which is below the Opening  66  in the Grommets and that which pierces the Sealing Lip  60 , which is folded over a sufficient number of times towards the side wall of the Tubular Extension  30 , to produce the resilient Teardrop Shaped Sealing Bulb  1124 ,  FIG. 6  shows a single fold over for clarity purpose, but the multiple fold overs may be required, depending on the thickness of the soft resilient neoprene foam to produce the Teardrop Shaped Sealing Bulb  1124 , which is thinner on the top than on the middle or at the bottom. The lower portion thereof is Stitched  92 , to the side wall of the Tubular Extension  30 . The Teardrop Shaped Sealing Bulb  1124  having greater compression and greater sealing resilience than the flat surfaces of prior art sealing lips. 
   
     FIG. 2 
   
     FIG. 2  is a plan view perspective of the Wild Fire Fighting Water Bucket  20 , looking downwardly there into. It has a tough pliable Bucket Body  21 , a Side Wall  24 , extends circumferentially there around to form the vessel. The, Bucket Body  21 , has a circular Opening  28 , (not visible), formed there around the distal end of the Side Wall  24 , to which the circularly shaped Bottom  26 , is attached. It takes the form and shape of a Tubular Extension  30 , which functions as a Dump Valve  36 . It is displayed withdrawn, upright within the Wild Fire Fighting Water Bucket  20 , and having the Third Flexible Tension Links  70 , skewed to one side for purpose of clarity. 
   The Second Flexible Tension Link  72 , which functions as a trip line is releasably supported by the Control Head Connector  38 ,  FIG. 1 , which selectively applies tension on the Connector Ring  73 , and the Third Flexible Tension Link  70  (purse lines) which are displayed skewed to one side for clarity purposes,  FIG. 2 . The Third Flexible Tension Link  70 , (purse lines), alternately enter opposite sides of the Free End Of Tubular Extension  32 , passing through the opposing sides of the Sealing Lip  60 , ie, the Front Sealing Lip  62 , and the Opposite Sealing Lip  64 , and terminating their distal ends with a Ball Stop  74 , and a Knot  76 ,  FIG. 6 . The Free End Of Tubular Extension  32 , forms a Discharge Port  35 , for releasing water from the vessel when tension on the Second Flexible Tension Link  72 , is released. 
   The, Tubular Extension  30 , has a Fixed End Of Tubular Extension  37 , which is secured to the distal end of the Side Wall  24  of the Bucket Body  21 , and has a Tubular Extension Mounting Flange  31 , and a circular ring of Tubular Extension Fasteners  33 , which make the connection thereto. When the Control Head Connector  38 ,  FIG. 1 , selectively releases tension on the Second Flexible Tension Link  72 , the weight of the water rapidly plunges the Tubular Extension  30 , out the Opening  28  in the Bottom  26 , unloading the water out through the Discharge Port  35 . When empty, tension on the Second Flexible Tension Link  72 , supplied by the Spring Reel  56 , returns the Tubular Extension  30 , to the upright position within the Wild Fire Fighting Water Bucket  20 . 
   The Third Flexible Circumferential Structural Link  54 , the Chain  55 , extends around the Bottom  26 , threaded through the Lower Connector Loops  46 , to be adjustably connected and tensioned to partially support the weight of the Wild Fire Fighting Water Bucket  20 , and it&#39;s water cargo,  FIG. 1 . The off center weight of the Rim Opening Device  1100 , which is heavier on one side than the other, causes the Wild Fire Fighting Water Bucket  20 , to unbalance, falling over on it&#39;s heavier side so as to rapidly immerse the Rim  22 , and the Mouth  23  below the surface which facilitates filling. The Second Flexible Circumferential Structural Link  82 , provides a means to variably adjust the capacity of the Wild Fire Fighting Water Bucket  20 , a Cinch Strap  84 ,  FIGS. 1 and 2 , circumferentially arranged around the inside of the Bucket Body  21 , is slideably received through a plurality of Cinch Strap Loops  86  attached midway up the inner Side Wall  24 . A, Buckle  88 , secures the terminal end of the Cinch Strap  84 . The, Cinch Strap  84 , is utilized to vary the size of the Wild Fire Fighting Water Bucket  20 , carrying capacity to match the capability of the Helicopter or other operating conditions such as elevation. 
   
     FIGS. 2 and 4 
   
   The primary focus of this invention is a Rim Opening Device  1100 , which opens the Wild Fire Fighting Water Bucket  20 , concentrically and circumferentially without utilizing structural members such as hubs and spokes which restrict the interior of the Bucket Body  21 . The, Rim Opening Device  1100 , produces a Centrally Open Top  1114 , and Mouth  23 , are free of cumbersome internal bracing, providing clean access into its interior for servicing components such as the Tubular Extension  30 , or unrestricted loading-unloading of general cargo which prior art collapsible buckets are incapable. 
   The Rim Opening Device  1100 , preferably has a plurality of interconnected Mechanical Wishbones  1102 , a minimum of three are required. A device having independent wishbones attached to the Bucket Body  21 , could be made to work, however it has several negative embodiments.  FIG. 2 , shows a Rim Opening Device  1100 , which has four interconnected Mechanical Wishbones  1102 , and this description will focus on that configuration. 
   In  FIG. 2  the Wild Fire Fighting Water Bucket  1100 , with four interconnected Mechanical Wishbones  1102 , has four Fixed End Connectors  1106 , i.e.  1159 , Fixed End of Mechanical Wishbone, Connector Points A, B, C, and D affixing the Fixed End Of Mechanical Wishbones  1105 , adjacent the Rim  22 , of the Bucket Body  21 , and four Free End Connectors  1108 , i.e.  1158 , Free End of Mechanical Wishbone, Connector Points W, X, Y, and Z co-joining the Mechanical Swing Arms  1104  and the Free End Of Mechanical Wishbones  1103 . The interconnected Mechanical Wishbones  1102 , share one half of each adjoining Fixed End Connector  1106 , which cooperate with each other, and their Mechanical Swing Arms  1104 ,  FIG. 4 , being rotatably affixed to the Fixed End Connector  1106  by means of a Fixed End Rotatable Fastener  1112 , their Mechanical Swing Arms  1104 , extending therefrom to be received by the Free End Connector  1108 , and rotatably affixed thereto by the Free End Rotatable Fastener  1110 . Both the Fixed and Free End Rotatable Fasteners  1112  and  1110 , are longitudinally round fasteners such as nut and bolt or a pin and retainer, refer to  FIGS. 4 and 8   c . Each, Mechanical Swing Arm  1104 , which functions as a threaded turnbuckle, have both a Left Hand Adjuster  1111 , on one end and a Right Hand Adjuster  1113 , on the other end, and are tensioned to a close fit within and adjacent the Rim  22 . A, Lock Collar  1175 , acts to secure same. 
   
     FIGS. 1 and 4 
   
   The upper end of Lifting Cord  1133 , is adjustably connected to the First Flexible Tension Link  40 , (suspension line) Connector Shackle  45 , which also connects the Connector Strap  43  which is choke connected to the Upper Connector Loop  44   FIG. 1 , to receive the weight of the Wild Fire Fighting Water Bucket  20 , and its water cargo, extending downwardly from the Connector Shackle  45  the Lifting Cord  1133 , passes through a Lifting Cord Passageway  1132 , in the Camlock Bracket  1140 , which is secured to the Rim Collar  80  by Camlock Bracket Fasteners  1142 . The Lifting Cord  1133 , then passes through a Spring Loaded Camlock  1144 , which prevents the Mechanical Wishbones  1102  from collapsing unexpectedly, and exits the Camlock Bracket  1140 , through a Lifting Cord Passageway  1132 , again extending downwardly it passes through another Lifting Cord Passageway  1132 , in the Free End Connector  1108 , a Ball Stop  74  on the terminal end of the Lifting Cord  1133 , provides an end stop and a Knot  76 , secures it. 
   When tension is applied to the Lifting Cord  1133 , it cooperates with the Free End Of Mechanical Wishbone  1103 , and the Free End Connector  1108 , which cooperates with the Mechanical Swing Arms  1104 , to push against the Fixed End Of Mechanical Wishbones  1105 , and the Fixed End Connectors  1106 , to cooperate with the Side Wall  24 , to thrust open the Wild Fire Fighting Water Bucket  20 , free of any bucket weight being placed on the Rim Opening Device  1100 , or it&#39;s Lifting Cord  1133 . 
   
     FIG. 3 
   
     FIG. 3  shows a side elevation of a longitudinal Side Wall Panel  25 , which has a Side Wall Panel Strip  48  dialectrically welded to it longitudinally. It has a Webbing Belt  42 , with a loop on each end sewn to it, the combination being the First Flexible Tension Link Extension  41 . The latter being connected to the First Flexible Tension Link  40  (suspension line), by means of a Connector Shackle  45 , and a Connector Strap  43 ,  FIG. 1 , which is choke connected to the Upper Connector Loop  44 , on the Webbing Belt  42 . Both the Side Wall Panel Strip  48 , and the webbing Belt are shown as dotted lines, centrally located longitudinally. The wider pair forming a Batten Pocket  50 , into which a Batten  52 ,  FIG. 1 , is latterly inserted. The Lower Connector Loop  46 , extending out the lower end of the Batten Pocket  50 , to receive the Third Flexible Circumferential Structural Link  54 , a Chain  55 , which serves to partially support the weight of the Wild Fire Fighting Water Bucket  20 . 
   The Wild Fire Fighting Water Bucket  20 , has two circumferential means to adjust its capacity. Its Side Wall  24 , has a plurality of Batten Pockets  50 , dimensionally spaced apart and arranged longitudinally between the Rim  22 , and the Bottom  26 , of the Bucket Body  21 ,  FIGS. 1 , and  2 . Battens  52 , inserted therein provide stiffness to the Side Wall  24 , to variably bulge outwardly when lifted out of the water, providing variable filling capacities. The upper ends of the battens terminating at the First Flexible Circumferential Structural Link  78 , the Rim Collar  80 , of the Wild Fire Fighting Water Bucket  20 , the lower ends terminating adjacent the Third Flexible Circumferential Structural Link  54 , a Chain  55 , which passes through the Lower Connector Loops  46 ,  FIGS. 1 and 3 , on the terminal ends of a plurality of First Flexible Tension Link Extensions  41 , i.e. the terminal end of the longitudinal Webbing Belt  42 , sewn to the Side Wall Panel Strip  48 , which has been dialectrically welded longitudinally to the Side Wall Panel  24 . A, Mechanical Wishbone Abrasion Cover  1101 , is shown  FIG. 3 , made of a tough abrasion resistant material it is dialectrically welded adjacent the Rim  22 , on the inside of Side Wall Panel  24 . It&#39;s purpose is to reduce abrasion caused by the opening and closing of the Rim Opening Device  1100 . 
   
     FIG. 4 
   
     FIG. 4  is a diagrammatic side elevation, an inside view of the Side Wall  24 , and that of a partially open Rim Opening Device  1100 , affixed adjacent to the Rim  22 , of the Wild Fire Fighting Water Bucket  20 , which, has a centrally Open top  1114 , its Mouth  23 , being unrestricted by prior art type of structural members such as outdated hubs and spokes which restrict access into the interior of the Bucket Body  21 . The latter having a Side Wall  24 , made from a plurality of Side Wall Panels  25 , dialectrically welded together. The elevation shows Pliable Side Wall Folds  94 , of a partially open Bucket Body  21 . The Rim Opening Device  1100 , has a plurality of Mechanical Wishbones  1102 , spread apart and dimensioned circumferentially around inside the Rim  22 , of the Bucket body  21 . Each Wishbone  1102 , having both fixed and free ends, the Fixed End of Mechanical Wishbones  1105 , being affixed adjacent the Rim  22 , by means of a Fixed End Connector  1106 , (a bracket) which secures it to the Rim Collar  80 , by means of a Fixed End Rotatable Fastener  1112 , which also rotatably connect the upper ends of the Mechanical Swing Arms  1104 , their lower ends being rotatably connected to the Free End Connectors  1108 , (a bracket) by means of the Free End Rotatable Fastener  1110 , Both the Fixed End Connector  1106 , and the Free End Connector  1108 , receive the Mechanical Swing Arms  1104 , in angled tracts, Connector Swing Arm Tracts  1157 , refer to  FIG. 8 ,  a, b,c , which shows the Angle Of Inclination  1134 . This angled, Connector Swing Arm Tract, serve the key purpose of thrusting the Rim Opening Device  1100 , to open concentrically when tension is supplied to the Lifting Cord  1133 . 
     FIG. 4  shows Mechanical Wishbone Abrasion Cover  1101 , which protects the interior of the Side Wall  24 , when the Free Ends of Mechanical Wishbones  1103 , are thrust upwardly and outwardly to open the Bucket Body  22 , concentrically. The, Side Wall Panel Strip  48 , and First Flexible Tension Links Extension  41 , and Webbing Belt  42 , are shown as dotted lines arranged longitudinally beneath the Mechanical Wishbone Abrasion Cover  1101 , which has been dialectrically welded to the Side Wall Panel  25 , adjacent to the Rim  22 . 
   The First Flexible Circumferential Structural Link  78 , a Rim Collar  80 , made of strong pliable vinyl material is doubled over a Rim Collar Rope  81 , and a Webbing  90 , all of which are structurally sewn by Stitching  92 , to the upper end of the Bucket Body  21 , at its terminal end to define the Rim  22 , of the Wild Fire Fighting Water Bucket  20 . 
   Each Mechanical Wishbone Arm  1104 , which functions as a turnbuckle, has a Left Hand Adjuster  1111 , having left hand threads, and a Right Hand Adjuster  1113 , having right hand threads. The Mechanical Wishbone Arm  1104 , thereby being longitudinally adjustable to size and having the means to tension the First Flexible Circumferential Structural Link  78 , stiffening, the Rim Collar  80 , which helps cutting the Rim  22 , underwater facilitating rapid sinking of the Wild Fire Fighting Water Bucket  20 . The rims of prior art buckets equipped with hubs and spokes tend to be looser not stretched tight, which tend to push the rim material up when contacting the water, temporarily forming a shallow hull which supports flotation rather than immersion. Prior art tipping weight attached to prior art side walls tend to distend the side wall also in the form of a shallow hull which also propagates flotation. 
   
     FIG. 5 
   
     FIG. 5 , is a plan view looking straight down into the wild fire fighting water bucket  20 . It&#39;s purpose is to diagram the outward, concentric development of the Rim Opening Device  1100 , and the profile of the side wall as the bucket opens or closes. Most other details have been eliminated for clarity purposes. The, Rim Opening Device Fully Collapsed  1116 , is shown centrally therein and transitions to Rim Opening Device Partially Open  1117 , and to Rim Opening Device Fully Open  1118 . Similarly, the Fully Collapsed wild fire fighting water bucket shell profile  1119 , transitions to, partially opened wild fire fighting water bucket shell profile  1120 , and transitions to, fully opened wild fire fighting water bucket shell profile  1121 . W, X. Y and Z indicating the free end of mechanical wishbone connector points  1158 , and similarly A, B, C and D indicating the fixed end of mechanical wishbone connector points  1159 . Fixed end connectors  1106 , indicating the fixed end of mechanical wishbone  1105 , and free end connectors  1108  indicating the free end of mechanical wishbone  1103 . 
   
     FIG. 6 
   
     FIG. 6  is a diagrammatic side elevation of the Free end of Tubular Extension  32 , Sealing Lip  60 , the Front Sealing Lip  62 , and the Opposite Sealing Lip  64 , the sealing lips being made from Resilient Sealing Lip Material  61 . The, Tubular Extension  30 , made of strong pliable material is folded over, i.e. the Tubular Extension Fold Over  106 . The, Distal End Of Tubular Extension  104 , defines an Opening  28 , which serves as a Discharge Port  35 , and having the Terminal Edge Of Tubular Extension Fold Over  108 , being Stitched  92 , to the side wall of the Tubular Extension  30 . 
   The, Sealing Lip  60 , is Stitched  92 , circumferentially there around the Opening  28 , adjacent the Distal End of the Tubular Extension  104 , which create the Front Sealing Lip  62 , and the Opposite Sealing Lip  64 . A plurality of aligned Grommets  68 , are installed in the Tubular Extension Fold Over  106 , with aligned Openings  66 , pierced in the Resilient Sealing Lip Material  61 , the latter is folded over to create a Teardrop Shaped Sealing Bulb  1124  (more than one fold over may be required.  FIG. 6  shows a single fold over.) The Resilient Sealing Lip Material  61 , being protected by an Abrasion Cover  1125 . The Third Flexible Tension Link  70 , i.e. purse lines alternately enter the Tubular Extension  30 , from opposite sides, a Ball Stop  74 , provides an end stop for travel, and a knot  76 , secures it to the terminal end thereon. 
   Tension on the Third Flexible Tension Link  70 , from the Second Flexible Tension Link  72  (not shown), draw the sealing lips into sealing engagement. The Teardrop Shaped Sealing Bulb  1124 , has greater compressibility than other prior art flat sealing lips while the thinner end serves to restrict the kinking of the Tubular Extension  30   
     FIGS. 7   a  and  7   b    
     FIG. 7   a  is a simplified end on elevation, while  7   b  is simplified side elevation, both representing round shaped Trimming Weights  1135 , which consists of a Trimming Weight Upper Half  1136 , and a Trimming Weight Lower Half  1137 , which are held together by Trimming Weight Fasteners  1138 , which locks the two halfs on to the Mechanical Swing Arm  1104 , which have been slideably received in the Round Mechanical Swing Arm Tract  1151 . The, Trimming Weights  1135 , are optionally movable to aerodynamically adjust in flight characteristics, and adjust the tipping action of the Wild Fire Fighting water Bucket  20 , to suit operational conditions or operator preferences. 
     FIGS. 8   a ,  8   b ,  8   c    
     FIGS. 8   a , and  c , are simplified plan views of a Free End Connector  1108 , having Connector Swing Arm Tracts  1157 , which aligns the Mechanical Swing Arms  1104 , on the Free End of Mechanical Wishbones  1103 , by means of Free End Rotatable Fasteners  1110 , which pass through an aligned Passageway  1122 , through both sides of the Free End Connector  1108 , and through an aligned Passageway  1122 , in the Mechanical Swing Arm Adjuster  1111 , (left hand thread) which is connected to the Mechanical Swing Arm  1104 . A, Lock Collar  1175 ,  FIGS. 4 and 8   d , serves as a locking nut, securing same.  FIG. 8   b  is a simplified side elevation of a Free End Connector  1108 . 
   The, Lifting Cord  1133 ,  FIG. 4 , passes through Lifting Cord Passageway  1132 , and has a Ball Stop  74 , to restrict lifting cord travel and a Knot  76 , at its terminal end to secure it. The, Mechanical Swing Arm  1104 , is free to rotate on the Free End Rotatable Fastener  1110 , within the Mechanical Swing Arm Tract  1157 , until it contacts the Free End Overcenter Stop  1109 , a saddle, to hold the Mechanical Swing Arm  1104 , level when the Rim Opening Device  1100 , is full deployed. 
   Fixed End Connectors  1106 , have a similar device, the Fixed End Overcenter Stop  1107 , refer to  FIG. 4 . The Fixed End Connectors  1106 , are installed upside down as to the Free End Connectors  1108 , and rotated 180 degrees. 
     FIG. 8   b , is a simplified side elevation of a Free End Connector  1108 , with the Mechanical Swing Arm Tract  1157 , which guides the Mechanical Wishbones  1102 ,  FIG. 4 , outwardly circumferential concentric development in cooperation with the pliable Side Wall  24  to fully open the Wild Fire Fighting Water Bucket  20 . 
   
     FIG. 8 
     d  
   
     FIG. 8   d , is a simplified side elevation of a Mechanical Swing Arm  1104 , having a Mechanical Swing Arm Adjuster  1111 , (left hand thread) on one end and a Mechanical Swing Arm Adjuster  1113  (right hand thread), on the other end, both of which have Lock Collars  1175  The adjustable Mechanical Swing Arm  1104 , is utilized to tension the First Flexible Circumferential Structural Link  78 , the Rim Collar  80 , under compression which stiffens the Rim  22 , of the Wild Fire Fighting Water Bucket  20 , which facilitates the Rim  22 , submersion. 
   
     FIG. 9 
   
     FIG. 9 , is a diagrammatic side elevation of a deployed emergency Extractor Jump Seat  1165 , having its pliable Seat Bottom  1163 , made of pliable material, and having a Seat Belt Harness  1166 , comprising a pair of Webbing Belts  1167 , attached to the inside of a Side Wall Panel  25 , of Side Wall  24 , of Bucket Body  21 , of a Wild Fire Fighting Water Bucket  20 , by means of the Upper Connector  1171 , and the Lower Connector  1172 , the latter serving as a Seat Hinge  1169 , and having its pliable Seat Bottom  1163 , Stitched  92 , to the Webbing Belt  1167 , i.e. the dotted lines, and having a Seat Belt And Buckle  1168 , connected to the upper end of the Webbing Belt  1167 , by Upper Connector  1171 . When not in use the Extractor Jump Seat  1165 , is folded into the Side Wall  24 , and releasably held in place by Velcro  1162 , connectors. The use of such an assembly is meant for emergencies only. The Centrally Open Top  1114 , of the Wild Fire Fighting Water Bucket  20 , makes the use of this assembly possible. Prior art flexible, collapsible water buckets with cumbersome hubs and spokes blocking access into a bucket have until now denied the use of such an assembly. 
   
     FIGS. 10 and 11 
   
     FIG. 10 , is a fragmented side elevation of the Wild Fire Fighting Water Bucket  20 , suspended from a helicopter (not shown) by a plurality of First Flexible Tension Links  40 , (one shown), by means of a Connector Shackle  45 , and a Connector Strap  43 , which is choke connected to the Upper Connector Loop  44 , at the upper extremity of the Side Wall Panel  25 , refer to  FIG. 3 . The, Upper Connector Loop  44 , sewn in to the First Flexible Tension Link Extension  41 , providing the connecting means, and terminating at the Lower Connector Loop  46 . The fragmented side elevation shows a Bucket Body  21 , having a Side Wall  24 , made from a plurality of Side Wall Panels  25 , and having a Rim  22 , which defines the Mouth  23  of a Centrally Open Top  1114 . The Tubular Extension  30 , which functions as a Dump Valve  36 , is shown in exploded view, exposing both the Tubular Extension Sealing Collar  34 , and the Lower Sealing Collar  1148 , both of which are protected by a Abrasion Cover  1125 . The Tubular Extension  30 , made of a tough pliable material, and having Grommets  68 , placed and spread apart on the Free End Of Tubular Extension  32 , to receive the Third Flexible Tension Link  70 , (not shown), refer to  FIGS. 1 ,  2  and  6  and having Tubular Extension Mounting Flange  31 , and Tubular Extension Fasteners  33 , to secure it to the Bucket Body  21 . A, Tubular Extension Sealing Collar  34 ,  FIG. 1 , is Stitched  92 , to the Tubular Extension Mounting Flange  31 , while a separate sealing collar, the Lower Sealing Collar  1148 , is independently attached there around the Opening  28 , in the Bottom  26 , by means of Butyl Sealing Compound  96 . Tubular Extension Fasteners  33 , pass through Grommets  68 , placed at the terminal end of the Side Wall  24 , pass through the Lower Sealing Collar  1148 , and pass through the Tubular Extension Sealing Collar  34 , and through the resilient sealing material of the Tubular Extension Sealing Collar  34 , which has been stitched to the Tubular Extension Flange  31 . It then passes through a plurality of Grommets  68 , placed circumferentially around the Tubular Extension Flange  31 . The, Tubular Extension Fasteners  33 , bringing the Tubular Extension  30 , into sealing engagement with the Bucket Body  21 . For servicing purposes, the Tubular Extension  30 , can now be cleanly removed from the Bucket Body  21 , without disturbing the troublesome Butyl Sealing Compound  96 , which is a significant problem when servicing prior art tubular extensions especially during field operations. 
   The Wild Fire Fighting Water Bucket  20 , has a third way to variably adjust the volume of water contained therein. An open topped Flexible Discharge Hose  1146 , is connected to a bulkhead Fitting  1145 , attached to the lower end of the Side Wall  24 , of the Bucket Body  21 , and its upper end is variably connected vertically to the Bucket Body  21 , by the Vertically Adjustable Hose Bracket  1139 . By vertically lowering the Flexible Discharge Hose  1146 , within the Adjustable Hose Bracket  1139 , water runs out the open top of the Flexible Discharge Hose  1146 , thereby reducing the weight of the water cargo to match the strength of the helicopter. Operationally, this works well on the smaller water buckets where only a small amount of water needs to be drained off. When turned downwardly, the Flexible Discharge Hose  1146 , (dotted lines) can be utilized by ground crews working in conjunction with the helicopter. 
   
     FIGS. 10 and 11 
   
     FIG. 11  is a fragmented side elevation of a prior art Tubular Extension  30 , installation in a Bucket Body  21 , which has only one sealing collar, the Tubular Extension Sealing Collar  34 , which is a single piece of resilient neoprene folded over and sewn to the bottom of the Tubular Extension Mounting Flange  31 . Butyl Sealing Compound  96 , then binds the Tubular Extension  30 , to the Bucket Body  21 , and Tubular Extension Fasteners  33 , secure the sealing engagement. All other reference numbers and description identical to  FIG. 10 . 
   By way of further explanation 
   
       
       a) The Wild Fire Fighting Water Bucket  20 , has four structural, vertically arranged, tension links.  FIG. 1 ,  3 ,  4 .
       i) # 40  First Flexible Tension Link   ii) # 41  First Flexible tension Link Extension   iii) # 72  Second Flexible Tension Link   iv) # 70  Third Flexible Tension Link   
     
       b) The, Wild Fire Fighting Water Bucket  20 , has three circumferentially arranged structural links.  FIG. 1 ,  2 .
       i) # 78  First Flexible Circumferential Structural Link  78 ,   ii) # 82  Second Flexible Circumferential Structural Link  82 ,   iii) # 54  Third Flexible Circumferential Structural Link,  54 .   
     
       a, i, # 40  First flexible tension links  40 , are suspension lines connected to and supported by the control Head Connector  38 , extending downwardly therefrom to be connected to the First Flexible Tension Link Extension  41 , by Connector Shackle  45 . 
       a, ii, # 41  First Flexible Tension Link Extension  41 , extend downwardly from the First Flexible Tension Link  40 , and comprise Connector Shackle  45 , and Connector Straps  43 , the latter which are choke connected to Upper Connector Loops  44 , which are stitched into a Webbing Belt  42 , which is stitched to the Side Wall Panel Strip  48 , which is then dialectrically or thermally welded to the Side Wall Panel  25 , the Webbing Belt exiting its distal end, and formed into the Lower Connector Loops  46 , which locates the Third Flexible Circumferential Structural Link  54 , a Chain  55  circumferentially arranged to support the Bottom  26 , of the Wild Fire Fighting Water Bucket  20 . It is threaded through the Lower Connector Loops  46 , and adjustably tensioned by another Connector Shackle  45 , (not shown)  FIGS. 1 ,  3 . 
       a, iii, # 72  The Second Flexible Tension Link  72 , functions as a trip line, utilized to selectively load or discharge water cargo. It is adjustably connected to the Control Head Connector  38 , by means of the Second Flexible 
     
  
   Tension Link Adjuster Chain  71 , the Control Head Connector  38 , releasably supports the Second Flexible Tension Link  72 , which extends downwardly therefrom, and having a Connector Ring  73 , located at its distal end to adjustably connect the Third Flexible Tension Links  70 , which are purse lines utilized to seal the Tubular Extension  30 , when the Tubular Extension  30 , is in the upright position under tension within the Wild Fire Fighting Water Bucket  20 . When tension is released the Tubular Extension rapidly plunges downwardly, becoming a Dump Valve  36 , discharging the water cargo out of the Discharge Port  35 , a re-sealable opening on the Free End Of The Tubular Extension  32 .
     a. iv, # 70  When tension is applied to the Third Flexible Tension Link  70 , which function as purse lines to gather the two sides of Sealing Lip  60 , on the Free End of The Tubular Extension  32 , “ie” the Front Sealing Lip  62 , and the Opposite Sealing Lip  64 , into a water tight sealing engagement. The Third Flexible Tension Links  70 , are made from soft, flexible, but strong woven nylon cordage. A, Ball Stop  74 , and a Knot  76 , tied on the distal end thereof provides for an end stop. They alternatively pass through aligned grommets located on opposite sides of the Sealing Lip  60 , extending upwardly to be adjustably tied to the Connector Ring  73 , which is releasably supported by the Second Flexible Tension Link  72 .   b, i, # 78  The, First Flexible Circumferential Structural Link  78 , defines the shape of a Rim Collar  80 , made from a flexible vinyl, material which is folded over a Rim Collar Rope  81 , and structurally trimmed with Webbing  90 , all of which are securely sewn together and Stitched  92 , to the Rim  22 , of the Wild Fire Fighting Water Bucket  20 ,  FIGS. 1 ,  3 . Compression generated by the adjustable Rim Opening Device  1100 , outwardly developing concentric expansion, serves to tension the Rim  22 , under compression, stiffening the distal edge of the Mouth  23 , i.e. the Rim  22 , for quicker submersion when filling the Wild Fire Fighting Water Bucket  20 . Prior art bucket flexible rims have a tendency to promote the bucket to float on the surface before slowly sinking. The hard tensioned edge of the Wild Fire Fighting Water Bucket  20 , tends to dive underwater submerging same very quickly, a definite advantage in time sensitive fire fighting operations.   b, ii, # 82  The, Second Flexible Circumferential Structural Link  82 , is an adjustable webbing belt which runs around the midpoint of the Wild Fire Fighting Water Bucket  20 . Its purpose is to selectively adjust the volume of water contained therein to match operational conditions and the strength of the helicopter. It comprises a Cinch Strap  84 , made of nylon webbing which runs through Cinch Strap Loops  86 , secured to and dimensioned around the Sidewall  24 . An adjustable Buckle  88 , being utilized to lock the Cinch Strap  84 , in the desired position.  FIGS. 1 ,  2 , &amp;  3 .   b, iii, # 54  The, Third Flexible Circumferential Structural Link  54 , can be a rope, cable, or chain, the Chain  55 , being the preferred method due to its adjustability. The Third Flexible Circumferential Structural Link  54 , i.e. the Chain  55 , is passed through the Lower Connector Loops  46 , which are dimensioned around the distal end of the Sidewall  24 . It is adjustably connected and tensioned to support the weight of the Wild Fire Fighting Water Bucket  20 .  FIGS. 1 &amp; 3 .   

     FIG. 5 , is a three stage sequential diagrammatic plan view showing the concentric transitional development of the Rim Opening Device  1100 , and outgrowth of the Rim  22 , contour. 
   Each wishbone arm  1104 , is equipped with a turnbuckle type, adjusting method having both left and right hand threaded ends to variably adjust the length of the wishbone arms  1104 . Left Hand Adjusters  1111 , have left hand threads and Right Hand adjusters  1113 , have right hand threads. Lengthening the arm stiffens the First Flexible Circumferential Structural Link,  78 ; ie the Rim Collar  80 , by putting it under circumferential compression, the stiffened Rim  22 , cuts into the water, facilitating rapid immersion. 
     FIG. 5 , is a simplified plan view of the Wild Fire Fighting Water Bucket  20 , looking downwardly there into through the Centrally Open top  1114 . It shows the transitional development of the Rim Opening Device  1100 , the Bucket Body  21 , the Side Wall  24 , and the contour of the Rim  22 , during opening and closing of the Wild Fire Fighting Water Bucket  20 . As it opens the Rim Opening Device  1100 , transitions concentrically from the Rim Opening Device Fully Collapsed  1116 , mode, to the Rim Opening Device, Partially Open  1117 , mode, to the Rim Opening Device, Fully Open  1118 , mode. Similarly, the Rim  22  and Side Wall  24 , develop outgrowth contours in co-operation with expansionary outwardly concentric development of the Rim Opening Device  1100 , completing full form development. 
   All Mechanical Wishbones  1102 , have their Fixed End Of Mechanical Wishbones  1103 , affixed adjacent the Rim  22 , of the Bucket Body  21 , i.e., the Fixed End of Mechanical Wishbone Connector Points A, B, C and D,  1159 . The, Fixed End Rotatable Fasteners  1112 ,  FIG. 4 , secure the Fixed End Connectors  1106 , thereto the Rim  22 , and provide the means to rotatably connect the Mechanical Swing Arm  1104 , downwardly therefrom. 
   The, Free End Connector  1108 , rotatably connects the other end of the Mechanical Swing Arm  1104 , by means of a Free End Rotatable Fastener  1110 , this end, the Free End Of Mechanical Wishbone  1104 , has Free End Of Mechanical Wishbone Connector Points W, X, Y, and Z,  1158 . The, Mechanical Wishbones  1102 , cooperate with the pliable Side Wall  24 , of the Bucket Body  21 , to open or close the Wild Fire Fighting Water Bucket  20 . 
   Both the Fixed End Connectors  1106  and the Free End Connectors  1108 , have Connector Swing Arm Tracts  1157 , which are guide tracts which functionally control the concentric outwardly development of the Rim Opening Device  1100 , opening the Bucket Body  21 . 
   Both the Fixed End Connectors  1106 , and Free End Connectors  1108 , embody an Angle Of Inclination  1134 ,  FIGS. 8A and 8C , in their design, and incorporate identical Angles Of Inclination  1134 , on the Fixed End Connectors  1106 , and Free End Connectors  1108 . When, the Bucket Body  21 , grows outwardly in a horizontally developing plane it is preferable that the rising Free End Connectors  1108 , guide their own development and that of the Mechanical Swing Arms  1104 , in a concentric plane. However, other variations could be made to function. The Free End Connector  1108 , is installed upside down and rotated 180 embody an Angle Of Inclination  1134 ,  FIG. 8A  degrees as to the Fixed End Connector  1106 ,  FIG. 4 . The Mechanical Wishbones  1102 , Angle of Inclination FIGS.  8 A and  8 C,— 1134 , converts vertical lifting moments, i.e. tension on lifting cord  1133 —to vertically and horizontally thrust open the Rim Opening Device  1100 , in co-operation with the Side Wall  24 , to open the Wild Fire Fighting Bucket  20 . 
   A, Rim Opening Device  1100 , having four interconnected Mechanical Wishbones  1102 , requires four Fixed End Connectors  1106 , and four Free End connectors  1108 , with matching Angles of Inclination  1134 , to produce an eight sided polygon figure, i.e.  FIGS. 2 , and  5 , connector points A, X, B, Y, C. Z. D, W. 
   Connector points A, B, C, D, are Fixed End Of Mechanical Wishbone Connector Points,  1159 , having Fixed End Connectors  1106 , while Free End Of Mechanical Wishbone Connector Points W, X, Y, Z,  1158 , have Free End Connectors  1108 .  FIGS. 2 and 5 . 
   In the same context a bucket having a Rim Opening Device  1100 , having five Mechanical Wishbones  1102 , would produce a ten-sided polygon while one having three Mechanical Wishbones  1102 , would produce a six sided polygon figure and so on. 
   Aerial fire fighting water buckets are sized to meet the lifting capability of individual helicopters, approximately fifteen different sizes are common to the industry. Accordingly, the capacities and dimensions of the buckets are varied to comply with the require specifications. Various sized buckets, each equipped with a wishbone type Rim Opening Device  1100 , as described herein, have an interlocking dimensional and structural relationship between the Mechanical Wishbone Connectors, Angle Of Inclination  1134 , and both the diameter of a drawn circle radially connecting the distal ends of each segment of a horizontally arranged polygon in the form of a Rim Opening Device, and the number of segments contained therein. A, Wild Fire Fighting Water Bucket, having four Mechanical Wishbones  1102 , would have four segments and so on. 
   For Example Only: Take a Rim Opening Device  1100 , equipped Wild Fire Fighting Water Bucket  20 , and benchmark its diameter—as described above—and effect dimensional changes to firstly its diameter and, secondly the number of segments (wishbones) contained therein.
     Example (a) If we change both the diameter and the number of segments we change both the Angle Of Inclination  1134 , and the dimensions of the segments.   Example (b) If we only change diameter, the Angle Of Inclination  1134 , remains the same, but the segments are dimensionally altered.   Example (c) If we only change the number of segments then we also change the Angle Of Inclination  1134 , of the segments.   

   The above examples represent an interlocking relationship which can be expressed numerically. 
   All prior art buckets utilized attached weights of one description or another to achieve quick tipping action and to submerge the bucket quickly in an open body of water for filing. The Rim Opening Device  1100 , solves this problem in an unique way. The Rim Opening Device  1100 , provides sufficient tipping action by utilizing in its construction, materials which have significant differences in their specific gravities when compared to each other, i.e. aluminum versus steel, light versus heavy. Mechanical Swing Arms  1104 , and, Fixed End Connectors  1106 , and Free End Connectors  1108 , made from a heavy metal are arranged on one side of the Wild Fire Fighting Water Bucket  20 , while lighter materials are similarly utilized for the opposite side. The weight differential being sufficient to achieve the desired results. The geometry of the tipping action benefits by the placement of the tipping weight differential being placed strategically at the rim, thereby slightly reducing the amount of weight required to create a desired tipping action, and provides torquing action, which facilitates a quicker tipping action. 
   The, Rim Opening Device  1100 , differentiates itself from prior art flexible bucket ballasting means by contiguously enjoining the ballast circumferentially and horizontally in union with the buckets upper terminus, thereby densely concentrating and centralizing the tipping action by optimizing ballast positioning contiguously at the Wild Fire Fighting Water Buckets  20 , upper distal extremity not nearly adjacent or below it which is the case of all prior art flexible buckets. 
   The circumferential and horizontal placement of centralized ballast in contiguous union with the Rim  22 , optimizes the gravitational moment while maximizing its Metacentric Height to achieve superior tipping, filling and in-flight characteristics. Vertically arranged ballast blocks or bags placed merely adjacent or well below the Rim  22 , as is the case with all prior art flexible buckets, have a much lower gravitational moment and subsequent lower Metacentric Height which translates into slower tipping, filling and poorer in-flight characteristics. These differences can be mathematically calculated using common, proven mathematical formulas for aircraft and ship stability calculations. 
   A Rim Opening Device  1100 , utilizing materials in its construction which have significantly different specific gravities as described above provide additional benefits. It is no longer necessary to punch several holes through the side wall of the bucket to secure bulky ballast bags or blocks, all of which can cause leakage or damage to the shell of the bucket where bulky external weight blocks or bags encounter hang ups or when harness suspension lines become entangled with protruding weights. Weight blocks externally attached to the bucket side create disturbance of air flows around the bucket when in flight causing tendencies for bucket rotation. The elimination of externally affixed bulky weights and their fastener straps from the outside shell of the bucket serves to provide a cleaner, more aesthetic, aerodynamic form, reducing bucket rotation accordingly. Additionally, Rim Opening Device  1100 , equipped Wild Fire Fighting Water Bucket  20 , as described herein, eliminate the need for internal bracings such as hubs and spokes which can also cause suspension &amp; harness line entanglement. 
   Trimming Weights  1135 ,  FIG. 7 , are slideably adjustable on a Round Mechanical Swing Arm Tract  1151 , provides the means to locate the Trimming Weights  1135 , on the Mechanical Swing Arms  1104 , they have Trimming Weight Upper Half  1136 , and a Trimming Weight Lower Half  1137 , and are secured by Trimming Weight Fasteners  1138 . They have two purposes (a) to provide aerodynamic trimming of the Wild Fire Fighting Water Bucket  20 , (b) to provide an incremental amount of weight to adjust the tipping action. 
   The Rim Opening Device  1100 , is installed inside the Rim  22 , out of the direct airflow which passes overhead. Current art buckets have their hubs and the tops of their inclined spokes extending above the rim deflecting and re-directing fast moving air into the bucket, agitating the water and causing water loss out. 
   Another objective of this invention was to improve serviceability, especially associated with servicing the Tubular Extensions  30 , repair or replacement. 
   The design and installation of prior art tubular extensions make servicing for repair or replacements most difficult, especially if it is to be undertaken during field operations. During manufacture the prior art resilient neoprene collars, i.e. the Tubular Extension Sealing Collar  34 ,  FIG. 11 , is folded over and sewn to the underside of the Tubular Extension Mounting Flange  31 , a Butyl Sealing Compound  96 , applied and it is then bolted to the Bucket Body  21 . Removing the installed Tubular Extension  30 , is made most difficult by the Butyl Sealing Compound  96 , usually large chunks of neoprene are ripped out during the removal process. It is then necessary to remove the sticky compound and damaged neoprene before replacement. 
   The solution to this problem is to provide a secondary collar, the Tubular Extension Sealing Collar  34 ,  FIG. 10 , being sewn to the Tubular Extension Mounting Flange  31 , while the Lower Sealing Collar  1148 , is firmly attached to the Bucket Body  21 , by the Butyl Sealing Compound  96 . Abrasion Cover  1125 , on both abutting collars protect the resilient neoprene material. Tubular Extension Fasteners  33 , secure the Tubular Extension  30 , to the Bucket Body  21 . When servicing is required the Tubular Extension Fasteners  33 , are removed, leaving the Lower Sealing Collar  1148 , in place, both the Tubular Extension Sealing Collar  34 , and the Lower Sealing Collar  1148 , are free to separate without the mess and damage associated with servicing prior and tubular extensions. 
   The, Wild Fire Fighting Water Bucket  20 , is equipped with flip up-down emergency extractor Jump Seats  1165 , hinged to the inside Side Wall  24 , of the Wild Fire Fighting Bucket  20 , held in place by Velcro Strips  1162 . A Seat Belt Harness  1166 , an adjustable Seat Belt And Buckle  1168 , provide security. A flip up-down Discharge Port Cover  1170 , (not shown for clarity purposes), hinged to the inside Side Wall  24 , of the Bucket Body  21 , is utilized to provide footing. 
   VARIATIONS AND ALTERNATIVES 
   The amount of weight required to provide adequate tipping action is directly related to the size and capacity of Wide Fire Fighting Water Bucket  20 . The offsetting weight coming from the weight differential between lighter Rim Opening Device  1100 , structural components being on one side, while heavier components being used on the opposing side. Whereas there is a significant difference in the specific gravity quotion of lighter materials, ie, for example, aluminum versus heavier materials, ie, steel. If it is necessary to gain additional weight differential for the larger Wide Fire Fighting Water Buckets  20 , by varying the materials used in the wishbone arms construction, a heavier solid bar versus a hollow section, a square bar for a round, a rectangular bar for a square bar and an irregular shaped bar for a rectangular bar, etc. 
   Additional trimming weights as shown in  FIG. 7  can be utilized. This invention describes a Rim Opening Device  1100 , having a Lifting Cord  1133 , guided through a Spring Loaded Camlock  1144 , for the purpose of restraining the Rim Opening Device  1100 , from collapsing when the Wide Fire Fighting Water Bucket  20 , is empty, or during impact with the water when dipping into the water, or during hard landings. Clearly there are many ways to achieve this connection. The restrainer has only the weight of the Rim Opening Device  1100 , to hold up, which in turn stops the bucket from collapsing. Any quick connector could be used for this purpose, ie, a light chain and toggle, a cleat, a clevis, a closable link or a snap pin located on the free-end connector to restrict movement from the fully open position. 
   While the specific embodiments and application of the Rim Opening Device  1100 , has been disclosed herein, the invention encompasses alternatives of the art. Their description which follows utilizes the enclosed drawings for easy referral. As stated earlier in detailed descriptions, it is preferred that the Rim Opening Device  1100 , be installed adjacent the Rim  22 , and inside the Bucket Body  21 , however other locations can be made to function. 
   Again, it is preferable that the Mechanical Wishbones  1102 , be interconnected to form a closed plane polygon when the Rim Opening Device  1102 , is fully deployed circumferentially around the Rim  22 . The Mechanical Wishbones  1102 , being connected to the Rim  22 , of the Wide Fire Fighting Water Bucket  20 , by Fixed End Connectors  1106 , each of which has two tracts, i.e. Mechanical Swing Arm Tracts  1157 , for receiving Mechanical Swing Arms  1104 , ie. one from each adjoining Mechanical Wishbone  1102 , thereby interconnecting all Mechanical Wishbones  1102 , to form a horizontally arranged closed plane figure. However, an aerial Wide Fire Fighting Water Bucket  20 , as described herein equipped with independent Wishbones  1102 , ones which are not interconnected but are fixed dimensionally, spaced apart, around the bucket rim could be made to functionally open the bucket. The Fixed End Connectors  1106 , would each only have one Mechanical Swing Arm Tract  1157 , for securing its own Mechanical Swing Arm  1104 . It would still open the Wide Fire Fighting Water Bucket  20 . The tough pliable Side Wall  24 , between the single Fixed End Connectors  1106 , deforms, simulating an angle of inclination, when filled the bucket takes a somewhat symmetrical shape. 
   There are a number of disadvantages to this alternatives, but it could be made to function. Similarly, Rim Opening Device  1100 , equipped aerial Wild Fire Fighting Water Bucket  20 , not in the form of a closed plane polygon are poor alternatives, but once again they can be made to function with a Rim Opening Device  1100 , or equivalent. Bucket rim, circumferential opening devices comprising rotatable swing arms, each having multiple rotatable, compounding, fixed end joints or connectors which when connected to the free end of a wishbone by a similar connector could be made to circumferentially and functionally open a wild fire fighting bucket. The physical function that opening applicably simulating or duplicating the angle of inclination utility which is a material element of this invention falls within the scope of this invention. 
   While the embodiment of a Wide Fire Fighting Water Bucket  20 , has been disclosed herein as an eight-sided polygon in shape, any bucket shaped in the form of a multi-sided polygon having similar embodiments can be utilized to produce a similar function. Alternative shapes created by varying the number of sides comprising the polygon may be useful to adapt the Rim Opening Device for other applications. 
   Alternative uses may be made from the Rim Opening Device  1100 , mechanism, adapted or re-configured to other useful needs and applications, ie. such as collapsible containers, pliable enclosures, temporary structures, closures, valves. 
   For example: If we reconfigure a Rim Opening Device  1100  and install it upside down in the bottom of a Wide Fire Fighting Water Bucket  20 , it can be made to function as a multi dump valve which can be opened or closed at the operators discretion. With the Fixed End Connectors  1106 , being attached to the Side Wall  24 , adjacent to the distal end of the Side Wall  24 , and having a pliable bottom, beneath the reconfigured Rim Opening Device  1100 , equipped with a resilient sealing lip, when the Free End Connector  1108 , are pulled up the Rim Opening Device  1100 , transitions to a Multi Dump Valve opening the closure, sealing closure between the Multi Dump Valve, and the interior of the Side Wall  24 , is accomplished by a pair of opposing resilient sealing lips, when tension is released, the weight of the water pushes, on the pliable bottom to effect sealing. 
   The embodiment of this invention for example can be reconfigured into portable, pliable, collapsible structures such as enclosures and collapsible containers. Further mechanical equivalents will be apparent in which elements of the Rim Opening Device  1100 , are replaced by parts that perform substantially the same function in substantially the same way to achieve substantially the same results and such equivalents are within the scope of the present invention. 
   OPERATIONS 
   The bucket in its collapsed state can be transported by helicopter to a staging area for operations. Once unloaded from the helicopter it is necessary to prepare the bucket for its assigned duty. After removal from its&#39; carrying bag the bucket needs to be assembled for duty. 
   Once the Control Head Connector  38 , is attached to the Support Line  100 , and the Electric Cord  98 , is plugged into an electrical supply line from the helicopter (not shown), the Wild Fire Fighting Water Bucket  20 , can be deployed, lifting tension from the helicopter will automatically open the Wild Fire Fighting Water Bucket  20 , i.e.  FIG. 5 , becoming Rim Opening Device Fully Open  1118 , and Fully Open Wild Fire Fighting Water Bucket Shell Profile  1121 . Alternatively, it can be opened manually while still on the ground. 
   The Lifting Cords  1133 , are manually pulled up, causing the Free End Of Mechanical Wishbones  1103 , to co-operate with the Mechanical Swing Arms  1104 , and with the Fixed End of Mechanical Wishbones  1105 , and the flexible Side Wall  24 , to thrust the Rim Opening Device Fully Open  1118 , which now develops the Fully Open Wild Fire Fighting Water Bucket Shell Profile  1121 . The, Free End Of Mechanical Wishbones  1103 , rising to the Rim  22 , the Centrally Open Top  1114 , of the Bucket Body  21 , forming a horizontal closed plane, and held open by Spring Loaded Camlocks  1144 , and tension generated at the Rim  22 , by the adjustable Mechanical Swing Arms  1104 . 
   The Second Flexible Circumferential Structural Link  82 .—can now be adjusted to meet the lifting capabilities of the helicopter. Markings on tags sewn to the Cinch Strap  84 , guide the operator in the selection process. The Cinch Strap  84  being slideably received in Cinch Strap Loops  86 , runs around the inside of the Side Wall  24 , terminating with a lockable Buckle  88 . The operator pulls the Cinch Strap  84 , through the Buckle  88  to the desired capacity and locks the Buckle  88 . The, Tubular Extension  30 , is withdrawn into the Bucket Body  21 , under the force of the recoil Spring Reel  56 , which applies tension on the Second Flexible Tension Link  72 , which in turn applies tension on the Third Flexible Tension Links  70 , which holds the Tubular Extension  30 , upright in the Bucket Body  21 , a releasable Trip Mechanism  58 , holds the Second Flexible Tension Link  70 , from releasing the Tubular Extension  30 . The, Control Head Connector  38 , complete with First Flexible Tension Link  40 , (suspension lines), connected to the helicopter which now flies the suspended bucket to an open body of water. The bucket is lowered on to the lake, its heavier side tipping the bucket over submerging the rim, the weight of the ballasted Mechanical Swing Arms  1104 , and the weight of the Third Flexible Circumferential Structural Link  54 , ie. the Chain  55 , acting to quickly submerge the entire Wild Fire Fighting Water Bucket  20 . 
   The helicopter now pulls the Wild Fire Fighting Water Bucket  20 , up and out of the water, tension being applied to the Third Flexible Tension Link  70 , and by the weight of the water, ie, hydrostatic pressure acting on the sides of the Tubular Extension  30 , helps the sealing engagement. The releasable Trip Mechanism  58 , in the Control Head Connector  38 , holds the Second Flexible Tension Link  72 , from releasing the Tubular Extension  30 . The tension on the Third Flexible Tension Link  70 , ie. the purse strings, brings the Sealing Lip  60 , into sealing abutment, preventing water leakage from the Discharge Port  35 , which is in its upright position below the water level in the Wild Fire Fighting Water Bucket  20 . 
   Another method of adjusting the fill level in the bucket is to vary the pulling force of the helicopter as it lifts the bucket up out of the water. Stiff Battens  52 , are dimensioned around the Side Wall  24 , in Batten Pockets  50 , arranged longitudinally and remain essentially straight when the bucket is pulled slowly out of the water to bulge outwardly thereafter. This slow pulling action results in a lower level of water in the Wide Fire Fighting Water Bucket  20 , as compared to a strong rapid pull which tends to bulge the stiffening Battens  52 , while still under water, resulting in a higher water level fill. 
   Additionally, another method of adjusting the fill level in a small bucket is available by means of the Flexible Discharge Hose  1146 . Prior to flight, the operator positions the distal end of the Flexible Discharge Hose  1141 , incrementally below the rim and the hose will overflow accordingly adjusting the fill level parallel to the top of the hose. Ground crews utilize this hose to fill water back pack, water reservoirs, etc. when slung under the helicopter. 
   The Wide Fire Fighting Water Bucket  20 , now filled with water, is flown to the site of the fire for dumping. The pilot activates an Electric Solenoid  59 , in the Control Head Connector  38 , which releases the tension on the Tubular Extension  30 , which allows it to plunge downwardly under the weight of the water, which evacuates the Wild Fire Fighting Water Bucket  20 , now the force of the Spring Reel  56 , pulls the Tubular Extension  30 , back to the upright position within the Bucket Body  21 , thereby allowing the Wide Fire Fighting Water Bucket  20 , to be refilled. 
   The emergency extractor Jump Seat option should only be used for lifesaving, dire straits extraction when firefighting personnel are about to be overrun by a fire storm and when other safe extraction methods are not practical or available. The helicopter operator utilizing a non-rotating steel line of sufficient length would lower the Wide Fire Fighting Water Bucket  20 , on to the extraction site, lay it over on to its side, slacking the lifting line to facilitate access passed the First Flexible Tension Links  40 , (suspension lines) which can be parted therefrom. 
   The Centrally Open Top  1114 , of the Wide Fire Fighting Water Bucket  20 , provides easy access into the interior of same. The first to enter would flip a Discharge Port Cover  170 , down then position him or herself facing outward and the rest of the crew would follow suit. The helicopter now lifts the bucket to the vertical position which allows the crew to arrange themselves into the extractor jump seats which they have deployed, securely strapping themselves into the Seat Belt Harnesses  166 , provided. The helicopter now flies the evacuees out of harms way to a first aid or fire base station. 
   
     
       
         
             
             
           
             
                 
             
             
               New 
                 
             
             
               No. 
               Element Name 
             
             
                 
             
           
          
             
                 
             
          
         
         
             
             
          
             
               20 
               Wild Fire Fighting Water Bucket 
             
             
               21 
               Bucket Body 
             
             
               22 
               Rim 
             
             
               23 
               Mouth 
             
             
               24 
               Sidewall 
             
             
               25 
               Sidewall Panel 
             
             
               26 
               Bottom 
             
             
               27 
               Harness 
             
             
               28 
               Opening 
             
             
               29 
             
             
               30 
               Tubular Extension 
             
             
               31 
               Tubular Extension Mounting Flange 
             
             
               32 
               Free End of Tubular Extension 
             
             
               33 
               Tubular Extension Fasteners 
             
             
               34 
               Tubular Extension Sealing Collar 
             
             
               35 
               Discharge Port 
             
             
               36 
               Dump Valve 
             
             
               37 
               Fixed End Of Tubular Extension 
             
             
               38 
               Control Head Connector 
             
             
               39 
             
             
               40 
               First Flexible Tension Link 
             
             
               41 
               First Flexible Tension Link Extension 
             
             
               42 
               Webbing Belt 
             
             
               43 
               Connector Strap 
             
             
               44 
               Upper Connector Loop 
             
             
               45 
               Connector Shackle 
             
             
               46 
               Lower Connector Loop 
             
             
               47 
             
             
               48 
               Sidewall Panel Strip 
             
             
               49 
             
             
               50 
               Batten Pocket 
             
             
               51 
             
             
               52 
               Batten 
             
             
               53 
             
             
               54 
               Third Flexible Circumferential Structural Link 
             
             
               55 
               Chain 
             
             
               56 
               Spring Reel 
             
             
               57 
             
             
               58 
               Trip Mechanism 
             
             
               59 
               Electric Solenoid 
             
             
               60 
               Sealing Lip 
             
             
               61 
               Resilent Sealing Lip Material 
             
             
               62 
               Front Sealing Lip 
             
             
               63 
             
             
               64 
               Opposite Sealing Lip 
             
             
               65 
             
             
               66 
               Opening 
             
             
               67 
             
             
               68 
               Grommet 
             
             
               69 
             
             
               70 
               Third Flexible Tension Link 
             
             
               71 
               Second Flexible Tension Link Adjuster Chain 
             
             
               72 
               Second Flexible Tension Link 
             
             
               73 
               Connector Ring 
             
             
               74 
               Ball Stop 
             
             
               75 
             
             
               76 
               Knot 
             
             
               77 
             
             
               78 
               First Flexible Circumferential Structural Link 
             
             
               79 
             
             
               80 
               Rim Collar (vinyl material) 
             
             
               81 
               Rim Collar Rope 
             
             
               82 
               Second Flexible Circumferential Structural Link 
             
             
               83 
             
             
               84 
               Cinch Strap 
             
             
               85 
             
             
               86 
               Cinch Strap Loops 
             
             
               87 
             
             
               88 
               Buckle 
             
             
               89 
             
             
               90 
               Webbing 
             
             
               91 
             
             
               92 
               Stitching 
             
             
               93 
             
             
               94 
               Pliable Sidewall Fold 
             
             
               95 
             
             
               96 
               Butyl Sealing Compound 
             
             
               97 
             
             
               98 
               Electric Cord (to helicopter) 
             
             
               99 
             
             
               100 
               Support Line (to helicopter) 
             
             
               101 
             
             
               102 
             
             
               103 
             
             
               104 
               Distal End Of The Tubular Extension 
             
             
               105 
             
             
               106 
               Tubular Extension Fold Over 
             
             
               107 
             
             
               108 
               Terminal Edge Of Tubular Extension Fold Over 
             
             
               109 
             
             
               110 
             
             
               111 
             
             
               112 
               Tubular Extension Restrainer 
             
             
               NEW ART 
             
             
               1100 
               Rim Opening Device 
             
             
               1101 
               Mechanical Wishbone Abrasion Cover 
             
             
               1102 
               Mechanical Wishbones 
             
             
               1103 
               Free End Of Mechanical Wishbone 
             
             
               1104 
               Mechanical Swing Arms 
             
             
               1105 
               Fixed End of Mechanical Wishbones 
             
             
               1106 
               Fixed End Connectors 
             
             
               1107 
               Fixed End Overcenter Stop 
             
             
               1108 
               Free End Connectors 
             
             
               1109 
               Free End Overcenter Stop 
             
             
               1110 
               Free End Rotatable Fastener 
             
             
               1111 
               Left Hand Adjuster 
             
             
               1112 
               Fixed End Rotatable Fastener 
             
             
               1113 
               Right Hand Adjuster 
             
             
               1114 
               Centrally Open Top 
             
             
               1115 
             
             
               1116 
               Rim Opening Device, Fully Collapsed 
             
             
               1117 
               Rim Opening Device, Partially Opened 
             
             
               1118 
               Rim Opening Device, Fully Opened 
             
             
               1119 
               Fully collapsed Wide Fire Fighting Water Bucket Shell 
             
             
                 
               Profile 
             
             
               1120 
               Partially opened Wide Fire Fighting Water Bucket Shell 
             
             
                 
               Profile 
             
             
               1121 
               Fully Opened Wide Fire Fighting Water Bucket Shell 
             
             
                 
               Profile 
             
             
               1122 
               Passageway 
             
             
               1123 
             
             
               1124 
               Teardrop Shape Sealing Bulb 
             
             
               1125 
               Abrasion Cover 
             
             
               1126 
             
             
               1127 
             
             
               1128 
             
             
               1129 
             
             
               1130 
             
             
               1131 
             
             
               1132 
               Lifting Cord Passageway 
             
             
               1133 
               Lifting Cord 
             
             
               1134 
               Angle Of Inclnation 
             
             
               1135 
               Trimming Weight 
             
             
               1136 
               Trimming Weight Upper Half 
             
             
               1137 
               Trimming Weight Lower Half 
             
             
               1138 
               Trimming Weight Fastener 
             
             
               1139 
               Vertically Adjustable Hose Bracket 
             
             
               1140 
               Camlock Bracket 
             
             
               1141 
             
             
               1142 
               Camlock Bracket Fasteners 
             
             
               1143 
             
             
               1144 
               Spring Loaded Camlocks 
             
             
               1145 
               Bulkhead Fitting 
             
             
               1146 
               Flexible Discharge Hose 
             
             
               1147 
             
             
               1148 
               Lower Sealing Collar 
             
             
               1149 
             
             
               1150 
             
             
               1151 
               Round Mechanical Swing Arm Tract 
             
             
               1152 
               Bottom Sealing Lip 
             
             
               1153 
             
             
               1154 
             
             
               1155 
             
             
               1156 
             
             
               1157 
               Connector Swing Arm Tract 
             
             
               1158 
               Free End of Mechanical Wishbone Connector Points W, X, 
             
             
                 
               Y, Z 
             
             
               1159 
               Fixed End of Mechanical Wishbone Connector Points A, B, 
             
             
                 
               C, D 
             
             
               1160 
             
             
               1161 
             
             
               1162 
               Velcro 
             
             
               1163 
               Seat Bottom 
             
             
               1164 
             
             
               1165 
               Extractor Jump Seat 
             
             
               1166 
               Seat Belt Harness 
             
             
               1167 
               Webbing Belt 
             
             
               1168 
               Seat Belt And Buckle 
             
             
               1169 
               Seat Hinge 
             
             
               1170 
               Discharge Port Cover 
             
             
               1171 
               Upper Connector 
             
             
               1172 
               Lower Connector 
             
             
               1173 
             
             
               1174 
             
             
               1175 
               Lock Collar 
             
             
               1176