Abstract:
A watercraft with several stability and handling design improvements. It has an enhanced reactive suspension system positioned in the vessel between a set of separating hull and body components. The watercraft also has improved braking, steering and stabilizing systems designed around multiple pivoting mechanisms on the vessel hull that work individually or in unison to achieve the desired braking or steering effect. The stabilizing system is operated by a computerized, gyroscopic hydraulic control to maintain stability and comfort of ride, minimizing the roll, pitch and yaw commonly experienced in the passenger compartment.

Description:
[0001]    Applicant claims priority of U.S. Provisional Patent Application Ser. No. 61/200,682 entitled “Watercraft Stabilization System”, filed Dec. 3, 2008, and incorporates by reference all material therein. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    The present invention relates to a watercraft with an improved suspension system adapted to ensure that a smooth ride is experienced on the passenger seat. More particularly, to a water vessel designed to provide, stability, comfort as well as enhanced performance and safety. 
         [0003]    Heretofore, because of the inherent jostling of a water vessel motorized watersports such as boating have been for those who are not prone to motion sickness or have back disorders. This new invention utilizes and combines known and new technologies in a unique and novel configuration to overcome the aforementioned “jostling” problems and accomplish this. Furthermore this new invention allows a level of control over the steering and braking of a watercraft that has not heretofore been experienced, opening up an entire new level of trick maneuvers for the experienced rider. 
       SUMMARY OF THE INVENTION 
       [0004]    The general purpose of the present invention, which will be described subsequently in greater detail, is to provide a watercraft configured similar to a motorcycle (waterbike) with an enhanced suspension system that is able to stabilize the passenger seat with respect to the motion of the hull assembly and provide a level of comfort and minimized motion heretofore unknown in the water sport industry. This waterbike has many of the advantages mentioned heretofore and many novel features that result in a new waterbike which is not anticipated, rendered obvious, suggested, or even implied by any of the prior art, either alone or in any combination thereof. 
         [0005]    An object of the present invention is to provide an improved waterbike suspension system that connects and resides between the vessel hull and vessel body and is capable of dramatically reducing the roll, pitch and yaw experienced by the passenger. 
         [0006]    It is another object of this invention to provide a waterbike with an improved steering and braking system capable of meeting or exceeding all known standards for waterbike handling. 
         [0007]    It is a further object of this invention to provide a waterbike adapted for use by persons prone to discomfort or injury as a result of excessive roll, pitch or yaw motions imparted to their bodies. 
         [0008]    It is yet a further object of this invention to provide a waterbike with enhanced handling characteristics. 
         [0009]    The subject matter of the present invention is particularly pointed out and distinctly claimed in the concluding portion of this specification. However, both the organization and method of operation, together with further advantages and objects thereof, may best be understood by reference to the following description taken in connection with accompanying drawings wherein like reference characters refer to like elements. Other objects, features and aspects of the present invention are discussed in greater detail below. 
     
    
     
       DRAWINGS 
         [0010]      FIG. 1  is a side view of the improved waterbike in an elevated configuration; 
           [0011]      FIG. 2  is a side view of the improved waterbike in a contracted configuration showing a phantom representation of the suspension system; 
           [0012]      FIG. 3  is a side view of the improved waterbike in an elevated configuration showing a phantom representation of the suspension system; 
           [0013]      FIG. 4  is a rear view of the improved waterbike in an elevated configuration; 
           [0014]      FIG. 5  is a rear view of the upper hull shell; and 
           [0015]      FIG. 6  is a series of three figures showing a conventional setup for the elevator lowered and the elevons in turning configurations. 
       
    
    
     DETAILED DESCRIPTION 
       [0016]    There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood and in order that the present contribution to the art may be better appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto. 
         [0017]    In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of descriptions and should not be regarded as limiting. 
         [0018]    Looking at  FIG. 1  it can be seen that the present invention entails a watercraft configured and stylized similar to a motorcycle hereinafter referred to as a waterbike  2  that is made of a body section  4  that is operatively connected to a propulsion/lower hull section  6  by an extendible suspension system, and a front ski assembly  10  operatively connected to the body section  4  by an extendible front shock absorber means  11 . Looking at  FIG. 2  is can be seen that the extendible suspension system has a central lift shock tube (shock absorber)  12  that may be extended upward pneumatically (or optionally hydraulically) so as to upwardly increase the separation distance between the body section  4  and the lower hull section  6 . 
         [0019]    Comparing  FIG. 1  and  FIG. 2 , the elevated ride height of the waterbike  2  can bee seen. Here the front shock absorber means  11  and the central lift shock tube  12  can both be seen pumped full of air so as to increase their effective length and raise the body section  4  vertically above the lower hull section  6 .  FIG. 4  also shows the waterbike  2  in the elevated configuration. 
         [0020]    Looking at  FIGS. 2 and 3 , phantom representations of the waterbike&#39;s suspension system in the contracted configuration and in the elevated configuration, it can be seen that body section  4  may be extended or raised above the lower hull section  6 . This extension is done pneumatically by the addition of pressurized gas into central lift shock tube  12  by a pneumatic control unit. Such pneumatic control units are generally comprised of a compressor, a tank, a pressure gauge, and an actuator and have been well known in the industry for years and the details of their operation and the specific configuration and selection of their integral components do not comprise part of the present invention. For visual clarity the pneumatic control unit has been eliminated from the figures. 
         [0021]    The central lift shock tube  12  is comprised of a front end tube  13  and a rear end tube  13  slidingly engaged for extension upon the admission of a pressurized gas (or fluid.) The admission of air into the central lift shock tube  12  is done via manual control. The central lift shock tube  12  has its front end  13  pivotally connected by a first axle to a lower subframe  26  which is a linear U shaped tubular member securely mounted to the lower hull section  6  such that the longitudinal axis of the lower subframe  26  resides parallel to the longitudinal axis of the waterbike  2 . The rear end of the central lift shock tube  12  is pivotally connected to a pivot linkage system. This pivot linkage system pivotally connects the rear end of the shock tube  12  by a second axle  16  to a pair of parallel pivot swingarms  18 . This admission of pressurized gas causes the extension of the rear end of the shock tube  12  so as to push on the top end of the pair of pivot swingarms  18  so as to tilt the swingarms  18  rearward and upward. Each of the pivot swingarms  18  are pivotally connected to an upper subframe  20  by a third axle  22  and a fourth axle  24 . The upper subframe is rigidly connected to the body  4 . At these same pivot connections (axles  23  and  24 ) on each of the pivot swingarms  18  there are also pivotal connections to the first end of a pair of upper lift arms  100  and the first end of a parallel and substantially similar pair of lower lift arms  28 . The second ends of these pairs of upper and lower lift arms are pivotally connected to a pair of rear stanchions  30  each rigidly mounted to the rear of the lower hull section  6 . 
         [0022]    The upper subframe  20  is connected to the body section  4  by means of sliding subframe  20  into channel grooves  32  (as shown in  FIG. 5 ) In this way, while the upper subframe  20  resides about the central lift shock tube  12  when the waterbike  2  is in the contracted position (as shown in  FIG. 2 ) when the waterbike is in the elevated position (as shown in  FIG. 3 ) the body section  4  may rise parallel to the hull section  6  with the additional lift of the front shock absorber means  11 . It is to be noted because of the rearward tilting action of the pivot swingarms  18 , when moving into the elevated configuration the body  4  moves slightly aft of the hull  6 . 
         [0023]    The pivotal connections on the front end of the central lift shock tube  13 , the lower subframe  26 , the rear end of the central lift shock tube  12 , the upper lift arms  100 , the lower lift arms  28 , the subframe  20 , the pivot swingarms  18  and the rear stanchions  30  are accommodated by linear axles that tie the pivotal connections together between the two parallel sides or alternatively by short pivot shafts. 
         [0024]    In operation when a wave is encountered mechanical force pushes up on the front end of the hull which transfers the load along the hull thru the hull subframe and onto the vertical stanchions as the hull lifts vertically while it raises horizontal. This in turn lifts up and the inboard (furthest back points) ends of the swingarms which raises vertically while the outboard ends of the swingarms remain where they are and compresses the shock. Since the swingarms move downward the top section of the unit remains parallel to the hull but the distance between the hull and the top section shortens. The reverse allows the hull to take the movement of the water and the rider has a suspensions system between himself and the hull. 
         [0025]    At the front of the waterbike, it can be seen that a front ski  10  is operationally connected to a set of handlebars  41  by a front shock absorber clamp means  70  which is connected and rotates within the top end of a pair of steering column supports  42  on the front of the body  4 . In a similar fashion to the extension of the central lift shock tube  12  a pressurized gas is manually admitted into front shock absorber means  11  to raise the front of the waterbike  2 . 
         [0026]    The bottom portion of the front fork  46  is attached to a cup member  44  which has two parallel support arms  48  extending out and connected to the upper portion of the small shock absorber  50 . The other lower portion of the small shock absorber  50  is also connected to the lower portion of the ski  10 . When the front portion of the ski  10  is raised up, then it compresses the small shock absorber upward and into the parallel support arms  48  while pivoting on pivot axle  52  which can best be shown in  FIG. 2 . 
         [0027]    The lower end of the shock  50  pivotally connects to the lower portion of the ski  10  in a similar fashion to allow the upward tilting of the ski  10  to accommodate turning against wave pressure. There is a trailing set of rear forks  62  extending from the rear of the cup  44  that connect pivotally to an extendable anti torque link  56  which keeps the ski  10  from turning because the bottom portion of the front shock  46  is rotatably housed in the middle portion of the front shock absorber means  60 . The top end of the anti torque link  56  is fixedly attached to the middle shock absorber means  60 . This prevents rotation of the ski  10  when encountering water forces or turbulence that would otherwise turn the ski  10  from side to side. The upper end of the front shock absorber means  11  is rotatably attached by a solid steering/support shaft  70  extending from its top to the front pillow bloc assembly  42  (like a steering post housing). The pillow block assembly  42  has a trailing front frame that connects to the body section  4 . Body section  4  has a steering handlebar system  41  which connects by a tierod to a dog ear extending from the side of the steering/support shaft  70  as is well known in the art. 
         [0028]    Generally, as the handlebars  41  are turned the ski  10  would turn also but the front tip of the ski would dive into the water and flip the waterbike  2 . Instead the front tip of the ski is tilted upward like the elevator of a “Canard Wing Design” on an airplane now causing the front ski to turn in the direction it is pointing in as this is done the ski  10  turns and thus increases its drag on the waterbike  2 . As the rear flow nozzle  44  pivots in the same direction as the front ski, it will push the rear of the watercraft in the opposite direction than the front ski is moving in. This creates more of a load to be put on it enabling it to turn the unit faster as the ski with its increased drag acts as a pivot point for the waterbike  2 . 
         [0029]    The central lift shock tube  12  and the front shock absorber means  11  besides raising the body section  6 , fore and aft, act as pneumatic shock absorbers to somewhat dampen the pitch of the waterbike  2  as waves pass along the longitudinal axis of the waterbike  2 . Additionally it serves to stabilize the front section of the lower hull  6  with respect to any movement of the body section  4 . 
         [0030]    The advantage of raising the waterbike&#39;s body section  4  above its lower hull section  6  is to allow a suspension system capable of handling the pitch, and a stabilization system capable of handling the tilt of the waterbike  2  to be placed between them, to reduce the drag of and minimize the contact hull surfaces of the waterbike, and to reduce the gas consumption and increase the top speed and acceleration. 
         [0031]    The waterbike  2  also has a braking system and a stabilizing system that may work independently or in unison with the steering system which will be discussed in more detail herein. These three systems commonly share a set of three flaps positioned by a manual or automatic pneumatic, hydraulic or electric control system best seen on a typical setup as shown in  FIG. 6  (two elevons  46  and one elevator  40 ). Such control systems are well known in the aviation and nautical fields and typically utilize a bell crank arm  45  that is extended by a pneumatic, hydraulic or electric actuator to adjust the vertical position of the attached flap. 
         [0032]    Looking at  FIG. 6  it can best be seen that at the rear of the waterbike  2  there are three flaps that are used to control the braking, steering and stabilization functions. These are all mounted and pivot about a common rear axle  74  oriented perpendicular to the longitudinal axis of the waterbike  2 . The two elevons  46  and the elevator  40  are mounted on the axle  74  just slightly ahead of their axial center. Thus it will always take force to tilt any of the flaps&#39; leading edges into the water. To tilt any flap further into the water will take increasing force since the surface area of each flap from its leading edge to the axis of tilt is less than the surface area from the axis of tilt to the trailing edge. As the moving water passes over the tilting flap more force acts upon the rear of the flap to try to keep the flap horizontal (or return it to a neutral position.) In this manner when under power, a rogue wave cannot grab the leading edge of any flap and pivot its position normal to the plane of forward motion of the waterbike  2 , bringing it to an unexpected, abrupt stop. 
         [0033]    The three flaps are controlled by three devices, the handlebars  41  (for steering), the computerized gyroscope (for stability), and the brake pedal (for braking and enhanced turning.) Each of these three devices sends a signal to a hydraulic flap manipulation system. Physical movement (positioning) of the three flaps is by hydraulic manipulation although electric servo motor manipulation has been successfully tested and is an acceptable substitute that does not depart form the scope of the invention. Such positioning systems have been utilized in the mechanical field of aviation for years and the details of their operation and the specific configuration and selection of their integral components do not comprise part of the present invention. For visual clarity the hydraulic flap manipulation system has been eliminated from the figures although the bell crank arm  45  that is extended by a pneumatic, hydraulic or electric actuator to adjust the vertical position of the attached flap can be seen in  FIG. 6 . The top illustration of  FIG. 6  shows the centrally located elevator  40  in a “full stop” or down position. The middle illustration shows the elevons in a right turn position, and the bottom illustration shows the elevons in a left turn position. 
         [0034]    When under power, the handlebars  41  of the waterbike  2  turn the front ski  10  and enable the turning of the jet nozzle  44  at the rear of the waterbike  2  which redirects the thrust of the water pushed past the propeller/impeller to steer the waterbike  2 . Simultaneously, the elevons  46  both pivot (although in opposite fashion) and the elevator  40  dips slightly to frictionally engage the water surface and enhance the steering at power. The amount of movement of the elevons  46  and elevator  40  is proportional to the amount of handlebar movement. 
         [0035]    When the engine is shut off but the waterbike  2  is still moving forward, there is no thrust from the jet nozzle  44  and without the flaps there would be a loss of steering. However, in the present invention the action of the elevons  46  and the elevator  40  in response to the handlebar  41  or brake pedal movement serve to continue the steering and braking functions, either independently or in unison. 
         [0036]    The brake pedal controls only the position of the elevator  40 . Depressing the brake pedal drives the leading edge of the elevator  40  further into the water regardless of what flap manipulations the handlebars  41  or the gyroscope are performing. The handlebars  41  counter pivot the two elevons  46  and slightly tilts the leading edge of the elevator  40 . The computerized gyroscope rapidly counter pivots the two elevons  46  in relation to the roll (rotation of the waterbike  2  about its longitudinal axis) while the handlebars  41  remain within a specified number of degrees left or right of its neutral steering position. When a turn is being negotiated the handlebars  41  exceed this position and the gyroscope signal input to the hydraulic flap manipulation system is overridden. 
         [0037]    The increased waterbike height enhances the motion experienced by the passengers as they are further from the axis of the roll, pitch and yaw of the passenger compartment as waves pass under the waterbike  2 . Under power though, the waterbike&#39;s predominant motion is roll. Hence, the need for a stabilization system to minimize the side to side rocking. This is accomplished by a computerized gyroscopic control unit located on or adjacent a lower surface of the body section  4  that accomplishes a fast response to minimally tilt down the leading edge of the elevon  46  on the opposite side the waterbike  2  is rocking towards and to simultaneously minimally tilt the trailing edge of the elevon  46  on the side of the waterbike  2  is rocking toward. These elevon actions will compensate for the roll of the waterbike  2  when moving under power by counteracting the side to side forces. Essentially, the stabilization system&#39;s gyroscope continually adjusts the flaps when the waterbike  2  is under power and traveling in a straight line or under minimal steering (left or right movement of the handlebars) so as to maintain a level position for the body section  4  or when in a stable turn, BUT when making a sharp turn (once the handlebars  41  are moved beyond a certain position) the handlebar position overrides any gyroscope control signal. 
         [0038]    It is to be noted that in a waterbike  2 , because of the physical dynamics of its design, there is no need for the computerized gyroscope to control the yaw (side to side tilting about its longitudinal axis) and pitch (front to back tilting about its longitudinal axis.) As such, an acceptable substitute for the computerized gyroscope would be a simple computerized tilt meter that only sends out a signal to the hydraulic flap manipulation system based on the roll component of the waterbike  2 . Computerized gyroscopic systems for the positioning of moveable means by hydraulic, pneumatic or electric actuators, have been utilized in numerous mechanical fields of endeavor for years and the details of their operation and the specific configuration and selection of their integral components do not comprise part of the present invention. For visual clarity the gyroscope and or tilt meter has been eliminated from the figures. 
         [0039]    The movement of the various elements as described above is best illustrated in  FIG. 6  with reference to the following chart. 
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
               
             
           
               
                   
               
               
                 Positions of Steering Stabilization System 
               
               
                 Elements with Applied Function 
               
               
                 (describes the position WRT the leading edges) 
               
             
          
           
               
                   
                 Elevon Position 
                   
                 Elevator 
               
             
          
           
               
                   
                 Applied Function 
                 R Elevon 
                 L Elevon 
                 Position 
               
               
                   
                   
               
               
                   
                 braking 
                 up 
                 up 
                 down 
               
               
                   
                 (with foot pedal) 
               
               
                   
                 turn right 
                 down 
                 up 
                 min down 
               
               
                   
                 (w handlebars) 
               
               
                   
                 turn left 
                 up 
                 down 
                 min down 
               
               
                   
                 (w handlebars) 
               
               
                   
                 simultaneous 
                 see above 
                 see above 
                 down 
               
               
                   
                 braking &amp; turning 
                 direction 
                 direction 
               
               
                   
                 stabilizing 
                 down 
                 up 
                 no movement 
               
               
                   
                 function 
               
               
                   
                 (gyroscope tilt 
               
               
                   
                 controls as PWC 
               
               
                   
                 rolls to left) 
               
               
                   
                 stabilizing 
                 up 
                 down 
                 no movement 
               
               
                   
                 function 
               
               
                   
                 (gyroscope tilt 
               
               
                   
                 controls as PWC 
               
               
                   
                 rolls to right) 
               
               
                   
                   
               
             
          
         
       
     
         [0040]    The ability to make the waterbike  2  perform a trick maneuver is enhanced since the operator can now control the braking, the altitude of the unit and intensity of the turn. 
         [0041]    Looking at  FIG. 5  it can be seen that the body  4  is a graphite carbon fiber shell  77  formed into a tunnel housing with all of the electronics, steering and braking controls as well as the seats and gas tank. It is slidingly fitted over a subframe  20  that has two rubber lined dados that travers the linear axis of the body. These dados are matingingly conformed to two engagement slots that run along the linear axis of this tunnel housing and mechanical fasteners with the appropriate shock dampening grommets are used to connect the pieces. 
         [0042]    The above description will enable any person skilled in the art to make and use this invention. It also sets forth the best modes for carrying out this invention. There are numerous variations and modifications thereof that will also remain readily apparent to others skilled in the art, now that the general principles of the present invention have been disclosed. As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.