Patent Publication Number: US-2023148735-A1

Title: Tank Carrier with Backpack Straps and Dolly

Description:
This application claims the benefit of U.S. Provisional Application No. 63/286,040 filed on 5 Dec. 2021, titled “Safe Military-MulePro;” claims the benefit of U.S. Provisional Application No. 63/279,061 filed on 12 Nov. 2021, titled “Safe Military-MulePro;” and claims the benefit of U.S. Provisional Application No. 63/279,058 filed on 12 Nov. 2021, titled “Safe Military-MulePro;” all of which are incorporated herein in their entirety for all purposes. 
    
    
     BACKGROUND 
     1. Field of the Invention 
     The present application relates to tank carriers. In particular, the present application relates to tank carriers that can be carried by the user which contain more storage compartments on the carrier. 
     2. Description of Related Art 
     It is common that buildings contain air conditioning, heating, and refrigeration equipment outside on top of the roof of the buildings themselves. Also, not every building has an easy access to get up onto the roof. Some have stairs, externally located building side ladders, internal building ladders that lead up through roof hatches, and some have no roof access stairs or ladders at all. This creates the present problem when the equipment on the roof needs maintenance or repair and the tools and equipment needed to repair them have to be physically transported up onto the roof and to the equipment. The overall safety and physical strain put on the user when getting the tools and equipment up onto and off of the top of the roof and to the equipment is the main concern here. At the moment with the prior art, a user can only get the equipment up onto and off of the roof of a building by either dangerously single handedly carrying the equipment up and down the ladders and stairs of a building, or by dangerously tying a rope to the equipment with no known or secure place to connect the rope to. 
     At times an individual user will have to take multiple trips up and down ladders or stairs given the large number of tools and other equipment needed in order to repair this type of equipment on roofs. This creates an even more significant amount of danger and physical stress to the user as the individual has to climb and descend the ladder or stairs multiple times while carrying the heavy equipment. The strain comes from the individual user climbing the ladder with heavy equipment and with bringing the heavy equipment to the location itself. Individual users will typically use one hand to carry their tools or bags from their vehicle all the way up the ladder which leaves an uneven strain on the individual. This puts more strain on one side of the body over the other and the individual will deal with pain over time because of this. Also, if the individual gets exhausted or experiences spasms or complications while climbing the ladder, there is nothing to help prevent their equipment from dragging them off the ladder at that point or making the situation even worse. 
     The safety and physical stress of the individuals while working on these projects should be preserved but the current method of carrying up the equipment as the person single handedly goes up a ladder or stairs, or roping up the equipment with no known secure place to connect a rope or rope clip to, and then when on the roof having to hand carry all the equipment and tools to the unit does not preserve this. There have been some improvements to this by having general bags or boxes that individuals can attach to ladders, or hold in a safer manner, which decrease the safety risk. However, there are still numerous concerns on the safety and physical strain that is put on the individuals in this work. 
     Although there are some methods of carrying equipment to job sites that require the use of ladders and multiple dollies, many shortcomings still remain. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The novel features believed characteristic of the present application are set forth in the appended claims. However, the invention itself, as well as a preferred mode of use, and further objectives and advantages thereof, will best be understood by reference to the following detailed description when read in conjunction with the accompanying drawings, wherein: 
         FIG.  1    is a perspective front view of the tank carrier, according to the present application; 
         FIG.  2    is a back view of the tank carrier, according to the present application; 
         FIG.  3    is a perspective right side view of the tank carrier, according to the present application; 
         FIG.  4    is a perspective left side view of the tank carrier, according to the present application; 
         FIG.  5    is a perspective front view of the tank carrier, according to the present application; 
         FIG.  6    is a left side view of the tank carrier, according to the present application; 
         FIG.  7    is a perspective front view of the tank carrier, according to the present application; 
         FIG.  8    is a perspective front view of the tank carrier, according to the present application; 
         FIG.  9    is a perspective left side view of the tank carrier, according to the present application; 
         FIG.  10    is a front view of the tank carrier, according to the present application; 
         FIG.  11    is a perspective front view of the tank carrier, according to the present application; 
         FIG.  12    is a perspective front view of an alternative embodiment of the tank carrier, according to the present application; 
         FIG.  13    is a perspective front view of an alternative embodiment of the tank carrier from  FIG.  12   , according to the present application; 
         FIG.  14    is perspective left side view of an alternative embodiment of the tank carrier from  FIG.  12   , according to the present application. 
         FIG.  15    is a close up perspective front view of an alternative embodiment of the tank carrier from  FIG.  12   , according to the present application; 
         FIG.  16    is a perspective left side view of an alternative embodiment of the tank carrier from  FIG.  12   , according to the present application; 
         FIG.  17    is a perspective right side view of the tank carrier and an alternative embodiment of the tank carrier from  FIG.  12   , according to the present application; 
         FIG.  18    is a perspective front view of another alternative embodiment of tank carrier, according to the present application; 
         FIG.  19    is a perspective front view of an alternative embodiment of the tank carrier from  FIG.  18   , according to the present application; and 
         FIG.  20    is a perspective front view of another alternative embodiment of tank carrier, according to the present application. 
     
    
    
     DETAILED DESCRIPTION 
     Referring to  FIG.  1    in the drawings, the tank carrier with backpack straps and dolly  100  is illustrated. The structure of tank carrier  100  is a hollow arched base  101  which is comprised of a top handle portion  103 , a tank carrier compartment  105 , slanted end walls  107 , straight end walls  109 , and notched base  111 .  FIG.  1    also shows that tank carrier  100  comprises tow handle  207 , tow handle release  209 , two handed cross bar double handles  229 , attachment base  323 , attachment base fasteners  325 , cross bar fasteners  333 , retractable tow cradle  401 , base  403 , fastener pin  415 , loop handle  417 , support legs  419 , retractable hoist ring  421 , and retractable hoist ring stoppers  423 , retractable cradle hinge  425 , bottle access door  501 , back plate  505 , T-shaped supports  509 , and front plate  511 . Tank carrier  100  may be used to carry, but is not limited to carry, oxygen and acetylene bottles. 
     Although the present application has been described with respect to hand tools, power tools, and equipment used by workers, such as heating and air conditioning workers, it will be appreciated that tool carrier  100  may easily be adapted and used by other types of workers, such as health care workers, military personnel, and other types of first responders. For example, emergency medical workers could use tool carrier  100  as a medical rescue pack to store, transport, and use items such as automated external defibrillators, oxygen tanks, medicine, bandages, IV bags, and other such emergency medical equipment. 
     Base  101  is hollow in order to ensure that tank carrier  100  will stay light weight enough for a user to carry it without issue. Tank carrier  100  may be made out of plastic, metal, wood, or any other lightweight material. Top handle portion  103  forms the top of tank carrier  100  and is square in shape and solid besides the handle portion at the very top and extends down to form the back wall of carrier  100 . The bottom sides of handle portion  103  connect to slanted end walls  107  which in turn connects to straight end walls  109 . It is appreciated that the dimensions and shapes of the end walls may change to accommodate whatever tank the manufacture designs it to carry. These three walls form tank carrier compartment  105  where the tanks are securely stored in order to keep them safe and secure during movement. 
     Referring now to  FIG.  2    in the drawings, the back of the tank carrier  100  is depicted. In this figure, the wheels  201  of the tank carrier are clearly seen as being connected by axel  203  which goes through the bottom of the hollow arched body  101  of the tank carrier. Further,  FIG.  2    also shows that the back of the carrier comprises back cushion  205 , tow handle  207 , tow handle release  209 , padded replaceable straps  211 , upper tightening grip  213 , lower tightening grip  215 , strap buckle housing  216 , strap buckle insert  217 , security strap  219 , security strap buckle housing  220 , security strap buckle insert  221 , two handed crossbar double handles  229 , and upper ladder hook fastener holes  231 . 
     Back cushion  205  is attached directly to the back of hollowed arched body  101 . Back cushion  205  supports the user while they are wearing the carrier and makes it easier for them to carry it around for longer periods of time. Back cushion  205  is secured to the back of hollow arched body  101  by back cushion fasteners  233  which can be seen in  FIG.  12   . Connected to the top of back cushion  205  are two padded replaceable straps  211  which are attached to the upper left and right side of cushion  205 . Padded straps  211  allow the user to carry tank carrier  100  on their shoulders which will let users carry it for longer periods and experience less fatigue. Also, straps  211  being replaceable will allow the user to change them out if they become worn down or if the user desires straps that have more cushion. Padded replaceable straps  211  can also be tightened to fit the body of the user by using upper tightening grip  213  or lower tightening grip  215  to achieve this. These tightening grips will use the extra lengths of the straps to either make it tighter or looser on the user which will allow the user to set it to where it fits best on them so it’s secured and comfortable. 
     Strap buckle housing  216  is found on the left padded strap  211  when looking at the back of tank carrier  100  and strap buckle insert  217  is on the right padded strap  211 . Buckle insert  217  will be inserted into buckle housing  216  to secure the two padded straps  211  together. When secured in this fashion, the straps will not be able to slide off the user during movement. Security strap  219  provides a strap which holds the wide padded backpack straps up in place and keeps them high and tight and out of the way so they don’t drag the ground or get damaged when not in use, storing, or towing tank carrier  100 . Security strap  219  is attached to the sides of tank carrier  100  and strap  219  buckles over padded straps  211  when securing the straps to the carrier. Security strap  219  is attached to hollow arched body  101  by security strap fastener  235  which can be seen in  FIG.  12   . 
     At the top of the hollow arched body  101  is tow handle  207 . At the top of tow handle  207  is tow handle release  209  which, when pressed down, releases tow handle  207  to be pulled away from arched body  101 . Tow handle  207 , in combination with the wheels at the bottom of arched body  101 , allow the user to pull tank carrier  100  behind them if they do not wish to carry it. Also at the top of hollow arched body  101  are two handed crossbar double handles  229  which protrude out from hollow arched body  101  on either side. Double handles  229  also have upper ladder hook fastener holes  231  going through them which allow ladder hooks  309  to be fastened in place there. These double handles will provide the user with a secure way to lift tank carrier  100  up. Since tank carrier  100  is heavier than most, double handles  229  gives the user a safer and more secure way to use both hands to lift tank carrier  100  so that the user is not injured from the strain of lifting the carrier. Double handles  229  are secured to tank carrier  100  by cross bar fasteners  333  which can be seen in  FIG.  1   . 
     Referring now to  FIGS.  3 ,  4 , and  6    in the drawings, side views of tank carrier  100  are depicted.  FIGS.  3 ,  4 , and  6    show that the sides of tank carrier  100  comprises rod compartments  303 , C-shaped fasteners  305 , screws  306 , balancing feet  307 , retractable ladder hooks  309 , hook fastener  311 , rotatable hook base  313 , lower hook base  315 , lower hook base fastener  317 , lower hook base screws  319 , hook base rotatable fastener  321 , attachment base  323 , attachment base fasteners  325 , upper hook base  327 , and upper hook base fasteners  329 . 
     Rod compartments  303  are found on the left and right sides of tank carrier  100  and can be used to store rod shaped equipment. This provides another way for the user to store all their equipment onto one object when they are climbing a ladder or carting the carrier wherever they need to go which frees the hands of the user thus making it safer. Rod compartments  303  are secured to straight end walls  109  by two C-shaped fasteners  305  which attach to the upper and lower ends of rod compartment  303 . C-shaped fasteners  305  are secured to rod compartment  303  and arched body  101  by screws  306  inserted on each side of rod compartment  303  and into rod compartment  303  itself. Rod compartment  303  also has balancing feet  307  at the bottom of them which are used to secure tank carrier  100  in place when it is not moving. 
     Ladder hook  309  is also found on both sides of tank carrier  100  and are used to attach tank carrier  100  to a ladder. Ladder hooks  309  are arched shaped and as shown in  FIG.  9    in the drawings, extend out towards the back of tank carrier  100 . Ladder hooks  309  are designed so if the person carrying tank carrier  100  up a ladder, or using a rope to lift it up, were to get tired in the process or if they had a muscle spasm and would need to set tank carrier  100  down, they could do so by using hooks  309  to rest tank carrier  100  on the ladder. Ladder hooks  309  will be most likely used when an individual is carrying up tank carrier  100  up a ladder themselves as opposed to when they are hoisting it because of the structure of the hooks getting in the way of hoisting, but these hooks may be used in any situation where tank carrier  100  is being taken up a ladder. Retractable ladder hooks  309  provide this service by being able to be flipped up and attach to the rungs of the ladder when this occurs. They provide hooks which allow the user to rest the tank carrier  100  on the ladder itself while the user recovers and once the user recovers, ladder hook  309  can be disengaged just by lifting up tank carrier  100  as gravity is what secures tank carrier  100  to the ladder using hooks  309 . 
     The entire ladder hook system is attached to both sides of arched body  101  by rotatable hook base  313  and retractable ladder hooks  309  are connected to hook base  313  by hook fasteners  311 . When rotatable hook base  313  is in the down position it is fastened to lower hook base  315  by lower hook base fastener  317 . Lower hook base  315  is L-shaped and one side of it is attached to arched body  101  by lower hook base screws  319 . The side of lower hook base  315  that is not attached to arched body  101  is just as long as rotatable hook base  313  and ends in a T shape. Being this length leads to the rotatable hook base  313  being snuggly secured when it is in the down position and fastened to lower hook base  315  which will prevent it from moving while the user is wearing or towing tank carrier  100 . 
     Rotatable hook base  313  may also be rotated into the up position when the user wishes to use ladder hooks  309  by rotating the base around rotatable hook base fastener  321 . Fastener  321  will be loosened which will allow the user to rotate base  313  to another position before tightening fastener  321  back and securing the base in the new position. Fastener  321  is also attached to attachment base  323  which is L-shaped and connects to arched body  101  by attachment base fasteners  325 . The attachment base  323  is attached to the side and front of arched body  101  which provides more stability in the system. Once rotatable base  313  has been rotated into the up position, upper hook base  327  will be used to secure it. Upper hook base  327  is secured to rotatable base  313 , which can be seen in  FIG.  5   , by upper hook base fasteners  329  and upper hook base  327  will attach to upper ladder hook fastener holes  231  on the double handles  229 . A handle fastener  331  will go through the double handles  229  to secure upper hook base  327  into position. 
     Referring now to  FIG.  5   , the front of tank carrier  100  is depicted with retractable tow cradle  401  down. Retractable tow cradle  401  further comprises base  403 , crenellated walls  405 , L support  407 , base fastener  409 , side walls  411 , fastener hole  413 , fastener pin  415 , loop handle  417 , support legs  419 , retractable hoist ring  421 , and retractable hoist ring stoppers  423 . Also shown in  FIG.  5    are ladder hooks  309  being secured to double handles  229  by handle fastener  331 . Tank carrier base  111  is also depicted which is notched in order to secure tanks once they are inserted into tank carrier  100 . The front of bottle access door  501  is also depicted which comprises back plate  505 , support plate  507 , T-shaped supports  509 , front plate  511 , tool compartment bottom plate  513 , and compartment support  515 . 
     Retractable tow cradle  401  is designed to act as a dolly and hold another object on tank carrier  100  while it is in tow. This object could be another tank, a vacuum pump, tools, or any other object that the user wants to tow. This gives the user a place to tow the heavy objects so that way they do not have to physically carry them with their hands while traveling to the job site. This will save trips and also reduce the physical strain put on the user. 
     Retractable tow cradle  401  is formed with 4 walls surrounding base  403 . The front and back walls are crenellated walls  405  as there is a notch in them that covers most of the wall. The other walls that form retractable tow cradle  401  are side walls  411 . Also, on side walls  411  there is L support  407  which connects to base fastener  409  which is used to connect retractable tow cradle  401  to tank carrier  100 . Underneath base  403 , there are four support legs  419  which are used to help support tank carrier  100  when it is set in place with the retractable tow cradle  401  is in the down position. 
     Side walls  411  have a fastener hole  413  in the middle of each of them which fastener pin  415  is inserted into. When fastener pin  415  is fully inserted through fastener hole  413 , the pin will catch on bottle access door  501  which will secure retractable tow cradle  401  in the upright position. But, when a user pulls on loop handle  417  attached to the end of fastener pin  415 , the pin will pull out of fastener hole  413  and so retractable tow cradle  401  will be loosened and go into the down position. 
     Also in  FIG.  5    is another look at retractable hoist ring  421 . Retractable hoist ring  421  is a U-shaped ring which is inserted into the top of hollow arched body  101 . The hoist ring  421  usually stays in the down position, due to gravity, but can be pulled up to allow the user to attach a rope, rope clip, hoist connector, or any other connection device to hoist ring  421  to hoist it up somewhere if they don’t want to use or can’t use the back straps. Stoppers  423  prevent ring  421  from fully going through hollow arched body  101  when it is being hoisted. Stoppers  423  are larger than the hole that ring  421  is inserted through and so once ring  421  has gone a certain length it will no longer be able to be pulled out further. These stoppers make sure that ring  421  will not be pulled out of the system while tank carrier  100  is being hoisted up. 
     Referring now to  FIGS.  7  and  8    in the drawings, the perspective front view of tank carrier  100  is depicted with bottle access door  501  in the open position. Access door  501  further comprises hinge  503 , back plate  505 , support plate  507 , T-shaped supports  509 , front plate  511 , tool compartment bottom plate  513 , and tool compartment support  515 .  FIG.  7    also shows retractable cradle hinge  425  which is used to move the retractable tow cradle into the upright and down position. Also,  FIG.  7    further depicts tow handle  207  in the pulled out position giving a look at how support bars  223  are used to provide extra length to the user towing it. Support bars  223  are usually stored in hollow arched body  101  and are inserted into tow bar holes  225  which are at the top of tow bar base  227  found at the top of tank carrier  100 .  FIG.  8    is used to depict how tank carrier  100  would look with access door  501  in the open position along with tank carrier  100  not housing any tanks. 
     Access door  501  is used to secure tanks that the user is currently carrying in tank carrier  100  while also allowing the user to access them easily. It is important that the tanks are secured during movement by the user so access door  501  is used to sandwich the tanks between the door and arched body  101  to secure them in place when access door  501  is closed. Also, since access door  501  can be opened, the user is able to easily change out the tanks that they are carting around without significant delay, or hurt their shoulders or injure themselves from having to pull the bottles straight up and out of a tight carrier. 
     Back plate  505  directly comes into contact with tanks when they are secured in tank carrier  100 . Back plate  505  is connected to arched hollow body  101  by hinge  503  which allows the user to open and close it. Connected to the front lower portion of back plate  505  is support plate  507  which is used to secure bottle access door to tank carrier  100 . Above support plate  507 , and connected to the front upper portion of back plate  505 , are two T-shaped supports  509  on both sides of back plate  505 . These supports are used to allow the user to wrap hoses, or other lengths of material, from the tanks or other equipment, around them in order to keep them organized and secured in place. 
     Attached to the front of the two T-shaped supports  509  is front plate  511 . Front plate  511  spans the entire distance between the two supports  509  but does not span the entire vertical length of these supports. Connected to the bottom of front plate  511  and the sides of the T-shaped supports  509  is tool compartment bottom plate  513 . With bottom plate  513  in this position, combined with front plate  511  and T-shaped supports  509 , a compartment is formed on the access door which allows a user to place items in it. This is useful if the user is wanting to carry tools or other items with them to the job site and does not have any other room to store them. The user will be able to store them in this cubby formed by these plates which will free up their hands and increase the user’s safety while they head to their location. Tool compartment support  515  spans the sides of the compartment formed and provides support for all the walls forming together. 
     Referring now to  FIG.  9    in the drawing, a side view of tank carrier  100  is depicted being hoisted up a building ladder with retractable ladder hooks  309  being used.  FIG.  9    depicts how ladder hooks  309  will be utilized if an individual were to take a break while hoisting tank carrier  100  up a building ladder. This shows how hooks  309  engage with the building ladder along with how retractable hoist ring  421  is used to hoist up tank carrier  100 . 
     Referring now to  FIG.  10    in the drawings, a front view of tank carrier  100  is depicted with retractable tow cradle  401  deployed carrying another object. When deployed, tow cradle  401  will act as a dolly which will allow the user to cart more objects around with them than they would have before. This figure shows how this would look and how a user would go about doing this. 
     Referring now to  FIG.  11    in the drawings, a perspective front view of tank carrier  100  being stored in a truck is depicted. It is important that tank carrier  100  be small and compact so that way it does not take up too much space wherever it is stored.  FIG.  11    depicts this by showing tank carrier  100  being compact and stored in a standard storage compartment that could be found on the side of work trucks. 
     Referring now to  FIGS.  12 ,  13 ,  14 , and  15    in the drawings, an alternative embodiment of tank carrier  100 , tank carrier  800 , is shown. This embodiment differs as it is designed to hold a larger, singular tank and changes the design to reflect that. This alternative embodiment comprises parts from the previous embodiment along with bottle access door  801 , hinge  803 , hinge fasteners  805 , base attachment  807 , latch  809 , door attachment  811 , attachment fasteners  813 , hook tab  815 , hook tab fasteners  817 , and hosing tab  819 . It is also noted that this alternative embodiment does not have two handed crossbar double handles  229 , retractable ladder hooks  309 , nor retractable tow cradle  401 . Tank carrier  800  is used to carry, but is not limited to carry, Freon bottles.  FIG.  12    also provides a look at back cushion fasteners  233 , and security strap fastener  235  which are used in all the embodiments to secure the back cushion and security strap to the tank carrier. 
     Bottle access door  801  in this embodiment is shaped with a curve in order to accommodate a larger tank, such as but not limited to a Freon tank. These tanks are larger than the tanks that were shown in the original tank carrier  100  and would not have worked in that system. The doors being curved here will guarantee that the tanks are secured. Access door  801  is also slim line in order to keep carrier  800  as compact as it can be. Door  801  is connected to the left side of hollow arched base  101  by hinge  803  which is fastened to door  801  and base  101  by hinge fasteners  805 . On the right side of the hollow arched base  101  is base attachment  807  connected directly to base  101  which has latch  809  fastened to it. This latch is used to secure bottle access door  801  in place during movement by latching onto door attachment  811  which is fastened to the door by fasteners  813 . This guarantees that door  801  remains secured while in movement. 
     At the top of tank carrier  800 , next to where retractable hoist ring  421  is located, hook tab  815  is protruding to the left of the carrier. This tab is fastened to the top of arched hollow body  101  by tab fasteners  817 . Hook tab  815  is a metal bar that extends from the top of hollow body  101  out to the side before coming back down and connecting back to hollow body  101  so as to leave a gap for a hook, or other apparatus used to hold objects, to be inserted there. Hook tab  815  is there so the user can secure gauges, hoses, and other tank equipment during transportation and storage. At the bottom of hollow body  101  is hosing tab  819  which can be used by the individual using tank carrier  800  to wrap around the hosing of the tank to secure it in place during movement. Hosing tab  819  accommodates the role that access door  501  allowed for in tank carrier  100  by giving the user a location to wrap their hosing around in a secured fashion. 
     Referring now to  FIG.  16    in the drawings, a side view of tank carrier  800  is depicted being carried on an individual’s back while they are climbing an extension ladder. One of the major parts of tank carrier  800  is that the user will be able to carry it on their back using the straps there.  FIG.  16    shows how this would look on an individual if they were carrying it up an extension ladder in this fashion. 
     Referring now to  FIG.  17    in the drawings, a perspective back view of tank carrier  100  and tank carrier  800  being pulled by an individual by their tow handle  207  is depicted. Tow handle  207 , in conjunction with wheels  201  is an important aspect as it allows the user to use one hand to tow the entire tank carrier around with them. As shown in  FIG.  17    as well, when the user utilizes this they will be able to tow a tank carrier in each hand which decreases the amount of trips the user would need to take. 
     Referring now to  FIGS.  18  and  19    in the drawings, another alternative embodiment of tank carrier  100 , tank carrier  900 , is shown. Like  FIG.  12   , tank carrier  900  does not have two handed crossbar double handles  229 , retractable ladder hooks  309 , nor retractable tow cradle  401 . In this figure, the modifications that can be seen is access door  901 , access door hinge  903 , hinge fasteners  905 , locking inserts  907 , and insert housing  909 . Tank carrier  900  is used to carry, but is not limited to carrying, nitrogen bottles. 
     As was mentioned in the previous alternative embodiment, tank carrier  900  is designed for situations where the tank carried is too large for the previous tank carrier  100 . The tank in this situation is not as round as the one in  FIG.  12   , however, it is still too large for tank carrier  100 . Unlike the door in  FIG.  12   , access door  901  is not curved and is straight along its outside length. The inside length of door  901  is curved to fit the dimensions of the tank used. Using this method will keep the tank securely fixed in position when tank carrier  900  is in movement. Door  901  is also thicker than previous embodiments which allows it to be straight on its outside face but curved inward on the inward face. Like tank carrier  800 , tank carrier  900  also uses a hinge connecting door  901  to arched hollow base  101  that is secured to both object by hinge fasteners  905 . Unlike tank carrier  800 , connecting door  901  is secured in the closed position by locking inserts  907 , found on the side of door  901 , inserting into insert housing  909  found on arched hollow base  101 . Once inserted, access door  901  will be secured and will not come loose. 
     Referring now to  FIG.  20    in the drawings, a perspective front view of an alternative embodiment of tank carrier  100  is depicted. This alternative embodiment, hereinafter carrier  1100 , shares a majority of its structure with tank carrier  900 . The main difference is that carrier  1100  is designed to carry other objects that are not tanks, such as, but not limited to, tools, compressors, motors, or other objects. Carrier  1100  has slide out dolly  1101  which is comprised of base  1103 , crenellated walls  1105 , L support  1107 , base fastener  1109 , side walls  1111 , support legs  1113 , and slide out housing  1115 . Slide out dolly  1101  functions the same as retractable dolly  401  but instead the user will be able to slide dolly  1101  out of housing  1115  when they wish to use it instead of taking out pins to put it in the down position. 
     It is apparent that an invention with significant advantages has been described and illustrated. Although the present application is shown in a limited number of forms, it is not limited to just these forms, but is amendable to various changes and modifications without departing from the spirit thereof.