Abstract:
A novel and unique bicycle seat for a rider includes a base having a base top surface with an inflatable bladder having a bladder top surface. The inflatable bladder is disposed on the base top surface and the base top surface and the bladder top surface together form a seat contour profile. A pump is connected to the inflatable bladder to introduce fluid media therein with a release valve fluidly connected to the bladder to permit fluid media to exit therefrom. Also, the bicycle seat of the present invention can be configured to be in the form of a cover to be retrofitted to an existing bicycle seat. In this configuration, the cover includes a base with a structure for securing it to the existing bicycle seat. For example, this structure can be a skirt of material or other releasable type of structure.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
       [0001]     This application is related to and claims priority from earlier filed provisional patent application Ser. No. 60/753,872, filed Dec. 23, 2006 and Ser. No. 60/745,800, filed Apr. 27, 2006. 
     
    
     BACKGROUND OF THE INVENTION  
       [0002]     This invention generally relates to a new and unique seat and seat cover containing an adjustable air bladder system. More specifically, the present invention relates to a bicycle seat and seat cover that includes an adjustable air bladder system that at least includes an integrated pumping mechanism that allows the seat to be adjusted before riding or during a ride; an air bladder with a contoured profile shape designed to lift the rider in selective areas so as to relieve pressure on other sensitive areas and simply to alter the contact points of the rider to the seat. Over time, any contact points may begin to be painful; an air bladder beneath a layer of gel or molded gel, or encapsulated within gel or any other cushioning material.  
         [0003]     There have been attempts in the prior art to make seats as light and comfortable as possible. This is particularly true with bicycle seats due to the nature and use of these types of seats. The prior art includes numerous attempts to make a bicycle seat that is both very light as well as very comfortable. The comfort of the seat is both a function of its shape and of the materials of which it is made. Often there can be conflict between adding shock absorbing materials such as gels and reducing the seat weight. The lightest seats tend to offer the rider much less cushioning. Also, many times a seat that is very comfortable for a shorter ride becomes quite uncomfortable for a much longer ride due to long term pressure on the same contact points between the seat and rider. In general, there is a balance between the cushioning of a bicycle seat and its performance. If a bicycle seat has too much cushion, performance, such as for racing and touring, suffers because a) the seat is generally very heavy and; b) the seat can absorb energy from the rider bouncing; c) the seat is not as sleek in configuration and can restrict movement required for competitive pedaling motion and can also cause chaffing and; and d) a seat that has too much cushion make the rider bounce too much and makes it more difficult for to control the bicycle this is of critical importance during racing, for example. In addition, there is an aesthetic issue where if the seat does not look sleek the riders will not want it on their bicycle.  
         [0004]     More specifically, most conventional bicycle saddles provide a low degree of comfort, especially for the novice or occasional bicycle rider who assumes an upright position. These conventional bicycle saddles generally are rigid in order to provide the necessary support, and are narrowed towards the front, to accommodate the upward and downward pumping action of the legs and to minimize friction between the legs and saddle, producing a hard, narrow ridge upon which a portion of the rider&#39;s weight usually rests. Saddles designed for racing or touring are particularly hard and narrow. Although these saddles typically are used in conjunction with drop handle bars in which the weight of the cyclist is shifted toward, much of the weight of the cyclist still rests on the saddle and is focused on relatively small contact points. Soreness often results, especially for the novice bicyclist and even for the experienced bicyclist after long periods of riding. This is due to the long term focused pressure on the same small contact points. This soreness is often aggravated by poor road maintenance, the nearly vertical orientation of the saddle post and rough condition on poorly paved, cobbled, or brick roads.  
         [0005]     Nonracing bicycles are often provided with wide, soft saddles having coil springs. These saddles are comfortable for novices and for short journeys, because of the greater weight of the saddle, and because of the width of the saddle which causes painful friction with the thighs, such saddles are unsuitable for racing conditions and for long journeys. Much of the support is provided by the edges and the forward, narrower portion of the seat where the cushioning effect of the springs is least. Springs of these saddles are prone to corrosion which is enhanced by the water-absorbing nature of the upholstery. Most bicycle saddles currently available for the general public are a compromise between the hard racing saddles and the wider spring cushion saddles previously described and have many of the problems associated with each.  
         [0006]     Thus, there have been many attempts to address comfort in the higher performance racing seats without reducing the performance thereof. For example, much of the prior art involves novel methods of using low durometer gels and foamed plastics. These materials are used in countless designs and methods. By way of example, U.S. Pat. No. 5,203,607, issued to Landi, discloses an ergonomic bicycle seat having a first layer of conventional foam padding and a second layer of thermoplastic elastomeric honeycomb padding. U.S. Pat. No. 5,108,076, issued to Chiarella, discloses an anatomical multilayer bicycle seat including an encapsulated gel layer. Further, U.S. Pat. No. 4,429,915, issued to Flager, describes a bicycle seat which distributes the weight of the rider.  
         [0007]     The prior art also has shown a number of attempts to utilize an inflatable air chamber as a means of cushioning the rider from shock. An air chamber has the advantage of providing a high degree of cushioning with a low amount of add-on weight to the bicycle. In addition, an inflatable air chamber allows the rider to adjust the firmness of the seat to their personal taste. For example, U.S. Pat. No. 6,390,548, issued to Cole, discloses a design for a bicycle seat with an inflatable interior for protecting the genital area of the bicyclist. U.S. Pat. No. 5,938,277, issued to Rioux, describes an air bladder assembly that can be added to the top of an existing seat construction.  
         [0008]     Therefore, there is a need for a seat, for use on a bicycle, that provides for the adjustable comfort of an air bladder, and allows for the shape and firmness of the seat to be customized and altered during the ride. There is also a need for such a seat to be light in weight and sleek and suitable for high performance use, and yet still be comfortable and adjustable to suit the rider over long periods of riding.  
       SUMMARY OF THE INVENTION  
       [0009]     The present invention preserves the advantages of prior art bicycle cushioned seats. In addition, it provides new advantages not found in currently available cushioned bicycle seats and overcomes many disadvantages of such currently available seats.  
         [0010]     The invention is generally directed to the novel and unique bicycle seat for a rider that includes a base having a base top surface with an inflatable bladder having a bladder top surface. The inflatable bladder is disposed on the base top surface and the base top surface and the bladder top surface together form a seat contour profile. A pump is connected to the inflatable bladder to introduce fluid media therein with a release valve fluidly connected to the bladder to permit fluid media to exit therefrom. Also, the bicycle seat of the present invention can be configured to be in the form of a cover to be retrofitted to an existing bicycle seat. In this configuration, the cover includes a base with a structure for securing it to the existing bicycle seat. For example, this structure can be a skirt of material or other releasable type of structure. Also, it is envisioned that the bladder may be affixed directly to the top of an existing bicycle seat to retrofit an inflatable bladder thereto. For example, the bladder may be attached to the top of the seat, such as with a peel and stick adhesive. In such cases where the bladder is affixed to the top of an existing bicycle seat, such bladder may also be encased within gel or beneath a layer of gel, and may be further optionally covered by a stretchable cover surface.  
         [0011]     The present invention is designed to lift the rider with air in select areas, so as to relieve pressure and also change the contact points. Prior art is using air in a chamber to adjust firmness and provide “better” cushioning to the sensitive areas but is not designed to alter or change the contact points. The invention in the Cole patent clearly describes a chamber with an hour glass shape designed to fill an empty space in the seat and to have the air cushion the sensitive areas and not to lift the rider or change the profile. The invention in the Rioux patent is also not selective profile changing in shape, but is described to have a “vertical cross-section with a uniform height between the top and the bottom thereof”.  
         [0012]     The present invention is designed to be a comfortable sleek seat that can be ridden as a normal seat when the bladder is fully empty. The bladder is flat and takes up almost no space when fully empty. The pump mechanism is intimately connected within the overall confines of the flat welded bladder sheet, thus the connection with the pump is also “flat”. The result is that bladder configuration of the present invention can be installed on a seat that will function as a standard “sleek” saddle when completely uninflated, and neither the bladder nor the pump connection changes this seat profile while in an uninflated state. When inflated, the seat profile and contact points are adjusted. With the present invention, a saddle is provided that meets the functional and aesthetic basics of an acceptable saddle when uninflated, and the air adjustments are an added option. If this is not the case, then a failure of the air bladder means that the remainder of the ride will not be as comfortable. This is not going to be acceptable, so it is important that the seat is normally comfortable with an uninflated bladder, and the rider is really no worse off than if they had no air adjust feature to begin with. Other air seat attempts in the prior art have bladders that have sidewalls and thus are still three dimensional shapes when uninflated. Most of these bladders are made from rubber products, and are designed to fill a chamber or empty space in the saddle. With these non-flat bladders, the resultant bike seat cannot be as sleek, since there is space needed for these air chambers. Furthermore, when the chamber is fully empty, the seat is not rideable, as its shape will be unacceptable or uncomfortable, and will sag into the evacuated chamber or not have sufficient cushioning. They are designed to be ridden with some inflation level to provide the basic comfort to the seat, and in some cases couldn&#39;t even be fully evacuated due to the shape of the walls. In the event of an air chamber failure, these prior art saddles would be uncomfortable to ride.  
         [0013]     The integrated pump of the present invention is preferably intimately connected to the film of the bladder itself. Other attachment methods will take away from the sleekness of the seat and its visual appeal. Also, having the pump as part of the bladder, means the attachment is also flat when uninflated, and thus the seat has no bump that might be caused by the attachment of a round tube or fitting. Since the seat of the present invention is designed to be a normal rideable seat when fully uninflated, the flatness of the entire bladder and pump mechanism is important. The integrated pump will also be more reliable, as it has no coupling point that could fail. When an electric pump is integrated into the present invention, it is not possible to avoid a coupling to the external device, and care has to be given to make sure the coupling is as secure and unobtrusive as possible.  
         [0014]     The convenience of the pumping mechanisms described in the present invention are better for dynamic adjustment than the systems employed in the prior art. An extended air tube with bulb is more cumbersome and could not be easily hidden in a sleek racing saddle. It also adds weight. The construction of the present invention allows easy dynamic adjustment with minimal weight and also does not impair the aesthetics of the sleek saddle. The pump mechanism of the present invention is an important part of being able to create a dynamically adjustable saddle which can still be almost exactly as flat and sleek as the best racing saddles in the market.  
         [0015]     The seats of the prior art are not well-suited for high performance riding. The prior art bicycle seats with air bladders typically involve the use of external pumping mechanisms to inflate or deflate the bladder and thus are not designed for dynamic use while riding. For example, U.S. Pat. No. 6,390,548, teaches an inflatable cushion with an air tube extending outwardly therefrom and extending outwardly of the bicycle seat with a free end of the air tube having a hand pump coupled thereto for selectively pumping air into the cushion. Other prior art seats have similar external pumping mechanisms. However, none of the prior art describes an inflatable seat cushion with an integrated pumping mechanism to solve the problem of ease of use during a performance ride, such as racing.  
         [0016]     Most notably, the prior art fails to provide a seat with an air bladder lifts the rider from the seat in selected areas so as to reduce pressure on other sensitive areas. Because a bike rider is in a dynamic situation on a ride, a seat configuration or firmness that feels comfortable initially may no longer feel comfortable after many minutes or hours of riding. The rider often finds it desirable or necessary to shift his or her position on the seat during the ride to vary the seat contact points with the body. Often, a rider will lift from the saddle for periods of time for the same reasons.  
         [0017]     It is therefore an object of the present invention to provide a bicycle seat that provides for the adjustable comfort of an air bladder.  
         [0018]     There is a further object of the present invention to provide a bicycle seat that allows for the shape and firmness of the seat to be customized and altered during a ride by the user to permit lift or support in selected areas to change the contact points to relieve pressure on others.  
         [0019]     There is also an object of the present invention to provide a bicycle seat that is light in weight yet still is comfortable, adjustable and suitable for high performance use.  
         [0020]     There is yet a further object of the present invention to provide a bicycle seat that is of a high performance saddle configuration yet is still capable of providing different profile contours of the seat without sacrificing the high performance characteristics of the seat.  
         [0021]     There is yet a further object of the present invention to provide a bicycle seat that is fully functional when deflated and when inflated changes its contour or profile. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0022]     The novel features which are characteristic of the present invention are set forth in the appended claims. However, the invention&#39;s preferred embodiments, together with further objects and attendant advantages, will be best understood by reference to the following detailed description taken in connection with the accompanying drawings in which:  
         [0023]      FIG. 1  is a top view of the bicycle seat of the present invention in an uninflated condition;  
         [0024]      FIG. 2  is a side elevational view of the bicycle seat of  FIG. 1 ;  
         [0025]      FIG. 3  is a top view of the bicycle seat of the present invention in an inflated condition;  
         [0026]      FIG. 4  is a side elevational view of the bicycle seat of  FIG. 3 ;  
         [0027]      FIG. 5  is a bottom view of the bicycle seat of  FIG. 1  showing the pump and release mechanism;  
         [0028]      FIG. 6  is a close-up perspective view of the pump and release mechanism of  FIG. 5 ;  
         [0029]      FIG. 7  is a top plan view of the preferred bladder system of the present invention in an uninflated condition with pump and release mechanism at one end of the bladder;  
         [0030]      FIG. 8  is a perspective view of the bladder system of  FIG. 7  in an inflated condition;  
         [0031]      FIG. 9  is a top plan view of an alternative embodiment of the bladder system of the present invention in quilted form in an uninflated condition with pump and release mechanism at one end of the bladder;  
         [0032]      FIG. 10  is a perspective view of the bladder system of  FIG. 9  in an inflated condition;  
         [0033]      FIG. 11  is a top view of a bladder formed in accordance with the present invention from two sheets of the same film material with the pump and release mechanism in the position shown in  FIG. 5 ;  
         [0034]      FIG. 12  is a top view of a bladder formed in accordance with the present invention from two sheets of different material with the pump and release mechanism in a different position as shown in  FIG. 5 ;  
         [0035]      FIG. 13  is a top view of a bladder formed in accordance with the present invention from two sheets of material with the pump and release mechanism located in an integrated side pouch;  
         [0036]      FIG. 14  is a cross-sectional view through the line  14 - 14  of  FIG. 1 ;  
         [0037]      FIG. 15  is a cross-sectional view through the line  14 - 14  of  FIG. 1  but with the bladder encapsulated within a cushioning layer;  
         [0038]      FIG. 16  is a cross-sectional view through the line  14 - 14  of  FIG. 1  but with the bladder directly receiving a finish layer;  
         [0039]      FIG. 17  is a perspective view, with outer cover removed for clarity, of an alternative embodiment of the seat of the present invention;  
         [0040]      FIG. 18  is a perspective view, with outer cover removed for clarity, of another alternative embodiment of the seat of the present invention;  
         [0041]      FIG. 19  is a perspective view of the alternative embodiment of  FIG. 18  showing contour profiling of the seat in accordance with the present invention;  
         [0042]      FIG. 20  is a perspective transparent view of an alternative embodiment of the seat of the present invention showing an alternative bladder configuration;  
         [0043]      FIG. 21  is a perspective view of the alternative embodiment of  FIG. 16  showing contour profiling of the seat in accordance with the present invention;  
         [0044]      FIG. 22  is a bottom view of a bicycle seat in accordance with the present invention with electronic automatic controllers for inflation and deflation of the bladder;  
         [0045]      FIG. 23  is a bottom view of the cover for a bicycle seat in accordance with the present invention;  
         [0046]      FIG. 24  is a top view of the cover for a bicycle seat of  FIG. 23  in an inflated condition;  
         [0047]      FIG. 25  is a close-up view of the pump and release mechanism of the cover of  FIG. 23 ; and  
         [0048]      FIG. 26  is a bottom view of the cover for a bicycle seat of  FIG. 23  shown retrofitted to an existing bicycle seat. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0049]     The present invention provides for a new and unique seat  10  that is light in weight yet is comfortable and adjustable. The seat  10  of the present invention can be used in any type of environment where such a seat  10  is required. There is particular application of the seat  10  of the present invention for use in on a bicycle (not shown) due to the requirements of such an environment. The present invention is not limited to such a bicycle application and it is intended that other seats and other environments are within the scope of the present invention. Therefore, by way of example and for ease of discussion and illustration, a bicycle seat  10  construction will be addressed herein. The present invention can utilize standard bicycle seat construction for its base and stem and could utilize any of the materials conceived of in the prior art for the basic construction. Since the interconnection of seat to bicycles are so well know, this interconnection need not be shown herein.  
         [0050]     Referring first to  FIG. 1 ., a top perspective view of the bicycle seat  10  of the present invention is shown in detail in an uninflated condition while  FIG. 2  shows an elevational view of the seat in the same uninflated condition. The bicycle seat includes a base  12 , which is preferably in the form of a racing style “horse saddle” configuration. While this configuration is preferred, the seat  10  may employ any type of configuration. The bicycle seat  10  uniquely includes an integrated fluid bladder  14  that preferably resides directly on the top surface  16  of the base  12 . The bladder  14  is preferably filled with air for ease of use.  
         [0051]     A layer of cushioning material  18  is provided over the top of the bladder  14  to not only provide a impact and shock absorption for the rider but also to secure the bladder  14  into place. As will be described in detail below, the cushioning material  18  is preferably a gel material that is overmolded over the bladder  14 . In  FIGS. 1 and 2 , the cushioning gel  18  and bladder  14  are transparent for ease of illustration and explanation but these components may be of any color. Cross-sectional views in  FIGS. 14-16 , discussed below, show additional details of this construction.  
         [0052]     As can be seen in  FIG. 1 , an integrated pumping mechanism  20  and release valve  22  in provided in fluid communication with the bladder.  FIG. 5  illustrates a bottom view of the bicycle seat  10  of the present invention showing an example positioning of the integrated pumping mechanism  20 . This pumping mechanism  20  can be seen through the bladder  14  and cushioning layer  18  in  FIG. 1 . A close-up view of the preferred pumping mechanism and release valve is shown in  FIG. 6 .  
         [0053]     The integrated pumping mechanism  20  is preferably in the configuration of a dome pump with an air release valve  22  located proximal thereto for ease of access. As seen in  FIGS. 5 and 6 , the pump  20  and air release valve  22  are preferably located underneath the seat  10 , however, they may be alternatively located anywhere on the seat  10 , such as on its side, under the front tip of the seat  10 , or in any other area allowing the rider easy access and one-handed operation. The pump mechanism  20  shown in  FIGS. 1, 5  and  6  can employ any type of pump mechanism but preferably employs a dome style pump and check valve technology manufactured by Dielectrics Inc of Chicopee, Mass. The dome pump  20  and release valve  22  are in fluid communication with the air bladder  14  disposed on the base  12  of the seat  20  and underneath the cushioning layer  18 . As will be discussed below, the bladder  18  is preferably constructed of film layers which are welded together.  
         [0054]     Referring now to  FIG. 3 , a top view, and  FIG. 4 , a side elevational view, the bicycle seat  10  of the present invention is shown to be in an inflated (or partially inflated) condition. As can be seen, the contour profile of the top  24  of the seat  10  has now been effectively changed by the inflation of the bladder  14 . In this particular configuration, the bladder  14  is selected to be of a substantially V-shape with two primary lobes  14   a  and  14   b  toward the rear of the seat  10 . When these lobes  14   a  and  14   b  are inflated, they effectively elevate selected portions of the seat  10  to provided target comfort to the rider (not shown). This is in contrast to prior art seats that merely inflate a large cavity in similar fashion to a large air cushion. The present invention maintains the substantial racing performance style seat but also provides targeted cushioning and profile adjusting which does not reduce overall performance of the seat  10 . As stated above, the seat  10  is a normal functional riding shape even when uninflated which is when the bladder  14  is flat. The bladder  14  can be provided in different shapes and still be within the scope of the present invention. For example, one includes a connection between the lobes at the front nose. Another, with the lobes separate (unconnected) at the nose, but connected in the rear of the seat. Another, with two distinct lobes, with no major connection. The air flows between small welded channels, or the seat is inflated with two separate pump mechanisms.  
         [0055]      FIGS. 3 and 4  also illustrate that it is possible to position of the pump mechanism  20  in any desired location. In  FIGS. 3 and 4 , the pump  20  is located under the front tip of the seat  10 , as can be seen through the transparent layers  12 ,  14 .  
         [0056]     Turning now to  FIGS. 7-10 , an air bladder  14  with integrated pump and valve are shown alone prior to installation into the seat of the present invention.  FIG. 7  illustrates one embodiment of the V-shaped configuration in an uninflated condition. As can be understood, the lobes  14   a  and  14   b  of bladder  14  on the free end are positioned at the rear of the seat  10  to provide the targeted cushioning required by a rider.  FIG. 8  shows the bladder  14  configuration of  FIG. 7  in an inflated condition. In this figure, the bladder  14  is inflated substantially to its maximum, however, it should be understood, that any degree of inflation can be provided as desired by the rider to achieve a custom delivery of targeted cushioning and contour profiling. To avoid overinflation of the bladder, an optional bleed off valve  26 , as seen in  FIGS. 7 and 8  may be provided. It should be noted that with the hand dome pump  20 , the bleed off valve is option. Where the bleed off valve  22  is preferably used with when an electric pump  50  is used to inflate by bouncing. In this case, the bleed off valve  22  really sets the seat pressure. The bleed off valve  26  may be tuned to open once a certain pressure inside in the bladder  14  is reached to avoid it from bursting.  
         [0057]      FIGS. 9 and 10  show an alternative embodiment of the V-shaped lobed configuration of the bladder  14  of  FIGS. 7 and 8 . This embodiment  28  of a bladder includes a quilted configuration where certain portions of the bladder are welded down at  30  to control the height of the bladder  28  in those locations. Further details of this option are discussed below.  
         [0058]     The bicycle seat  10  can be formed into many different configurations and still be within the scope of the present invention. More specifically, the bladder  14  (and  28 ) can be formed in many different ways. It is preferred that the bladder  14  be a flat as possible when in an uninflated condition so the inherent profile of the seat can be enjoyed by the user if additional contouring is not desired. In other words, when the bladder  14  is not inflated, its envisioned that the seat  10  performs similar to a standard bicycle seat. Furthermore, the bladder system described can be added to many existing comfortable seat designs without significantly altering their basic design or comfort when uninflated.  
         [0059]     To achieve the foregoing, it is preferred that two layers of material, such as film are secured together, such as by welding. For example, as in  FIG. 11 , the films  32  and  34  can be welded at lines  40  into a pattern or shape that allows the seat  10  to change shape in a specific region or many regions when inflated to various pressures.  FIG. 11  illustrates this welding of two layers  32 ,  34  to form the desired configuration prior to trimming the excess material  36 . The pump  20  and release valve  22  can be located effectively anywhere within the welded boundary of the bladder. In  FIG. 11 , the two layers  32 ,  34  are of the same material, such as stretchable polyurethane film. As a result, when inflated, both sides of the bladder  14  will tend to expand equally.  
         [0060]     While it may be desirable to include both films  32 ,  34  of the bladder  14  as the same material in certain applications and environments, it may also be desirable to provide bladder films  32 ,  34  of two different types of materials. For example, as shown in  FIG. 12 , a first film layer  32  that faces upwards when installed can be of a stretchable material while the opposing layer  34  is of a non-stretchable material. Thus, in this case, when the bladder  14  is installed into a seat  10  and then inflated, the bladder  14  will tend to expand in one direction. Preferably, the layer  34  that is closest to the base  12  of the seat  10  is of a non-stretchable type while the opposing layer  32  is stretchable. Thus, during inflation, the bladder  14  will expands upward toward the rider without tending to separate from the base  12 .  
         [0061]     In  FIGS. 14, 15  and  16 , cross-sectional views of different embodiments of the seat  10  of the present invention are shown in detail. As shown in  FIG. 14 , a cross-sectional view through the line  14 - 14  of  FIG. 1 , the bladder  14  is preferably integrated into the seat construction below a top layer of fabric  38  and a layer of cushioning  18 , such as gel or other cushioning material. As a result, the bladder  14  is beneath an additional external cushioning layer  18 . As in  FIG. 15 , the bladder  14  can be completely embedded with the cushioning layer  18 , such as gel. Thus, in this embodiment, the bladder  14  is fully encapsulated for additional cushioning on all sides. In  FIG. 16 , the bladder may also be integrated into the seat  10  just below a cover layer  38  of fabric, vinyl or leather (or other suitable material) without a cushioning layer, as in  FIGS. 14 and 15 . Still further, the bladder  14  can also include a layer  38  laminated film, fabric, or other cover material construction where this laminated bladder  14  itself serves as the top layer of the seat  10  to interface directly with the rider.  
         [0062]     As stated above, the bladder  14  can be constructed from any type of fluid-tight containing films  32 ,  34 , such as ones that can contain air, but is preferably made out of relatively soft and durable films. It is also desirable for the films  32 ,  34  to be dielectrically weldable or heat sealable to be economically fabricated into the appropriate shapes. Thermoplastic polyurethane films are preferred for the bicycle seat  10  of the present invention, but other films materials may be suitable as well. More specifically, the polyurethane films can be polyether or polyester polyurethanes and can be utilized in thicknesses from 1 mil to 20 mil or thicker, but preferable thicknesses are in the range or 3 mil to 10 mil, which provide the good strength without adding unnecessary weight or costs.  
         [0063]     The construction of bladder  14  can also be formed in different ways and still be within the scope of the present invention. For example, one method of manufacturing the air bladder  14  is from welded polyurethane films. These are somewhat ideal, in that they are both flexible and strong, and exhibit good cold-crack strength. These materials are also dielectrically weldable. The bladder  14  may of course be made of other materials such as polyolefins and vinyls, block copolyester and Nylon, and other films. The bladder  14  could also be heat sealed or glued instead of dielectrically welded, but the welding  40  does perform very well and allows easy attachment of the weldable pump parts.  
         [0064]     More specifically, the inflation height and welding spots  30  and welding lines  40 , as in  FIGS. 11 and 12 , can be optimized to improve performance. In design of the bladder shape, it is important to design for the maximum ultimate height of the inflated bladder  14 . If the films  32 ,  34  are welded together as two flat sheets, then the height of the inflated bladder  14  will relate to the expanse of film between the welded points  30 ,  40 . Thus, a narrow bladder channel will inflate to less height under pressure than a wider area in the bladder  14 . It is possible to alter the height of the inflated area by pre-forming the film sheet prior to welding. This is preferably done through vacuum-forming or thermoforming the urethane film into a shape prior to molding, and thus building into the film a greater room to expand when inflated. Rather than allowing for greater inflation height, it is sometimes desirable to limit the inflation height in specific areas of the seat  10 . As stated above, the welded bladder  14 , with basic flat sheets  32 ,  34 , inflates according to its shape, and wider areas of the bladder  14  will naturally inflate to a higher profile under pressure than narrow bladder areas. The height of the inflated seat  10  in these wider areas of the bladder  14  can be limited by a welding a quilted type pattern into the bladder, as seen in  FIGS. 9 and 10 . Small spots or dots  30  can be welded between wide expanses to keep the inflated height at a controlled limit. Thus, using the design techniques above, it is possible to create a seat  10  that has a specific molded gel profile when uninflated, and changes to a specific alternative profile when fully inflated.  
         [0065]     The bladder design and shape can be provided in many different configurations and still be within the scope of the present invention. One specific novel aspect of the present invention is to utilize the bladder  14  in a shape that when inflated lifts the rider from the seat in selected areas, and thus relieving pressure on the genital area or other sensitive areas of the rider. The configuration can be modified for male and female riders. In order to carry this out, the bladder  14  is made in a contoured shape in the pattern of the areas to be lifted. The V-shaped lobed design, with lobes  14   a  and  14   b , is preferred for this purpose. This bladder  14  is shaped specifically to relieve pressure on the genital area when inflated or to change the contact points between the rider and the seat at various points in the ride.  FIGS. 17-21  show additional possible embodiments of the bladder configuration. For example,  FIG. 17  shows an embodiment with the bladder  14  across the rear of the seat  10  while  FIG. 18  shows two long lobes  14   a ,  14   b  that are fluidly connected to one another.  FIG. 19  shows the top of a seat  10  that has been inflated using this configuration. The custom contour profiling of the bladder  14  of  FIG. 18  can be clearly seen.  FIG. 20  shows yet another bladder configuration with a plurality of longitudinal running lobes  14   a - d  are interconnected with a transverse bladder member  14   e .  FIG. 21  shows the top of a seat employing the bladder of  FIG. 20 .  
         [0066]     As can be understood due to the integrated pump and release valve, the rider can vary the pressure before or during the ride to maintain comfort. The profile and support of the seat can be significantly changed by varied inflation levels. This shape combined with molded gel, as described below, provides a very unique combination of support and comfort that testers have never before experienced in a seat or gel cover. In accordance with the present invention, air provides support under the preferred cushioning layer of gel to lift the rider so that the genital area is relieved of pressure on the seat. This is very different than and is an advance over the prior art. Thus it is new and novel to integrate an air bladder into a bike seat wherein the shape of the air bladder is designed to provide support and lift to relieve pressure on the rider in other areas by changing the contour of the seat in specific locations. In addition to relieving pressure, the air bladder also provides lightweight support and cushioning for the rider.  
         [0067]     Specifically, it has been found that the integration of the bladder with a gel layer or layers, as in  FIGS. 14 and 15 , provides for both cushioning and stabilization of the bladder. It has been found that stabilizing of the bladder inside of molded gel or in between two layers of gel that is tacky achieves superior results and performance. Using the bladder as the top layer of the seat or just under a top fabric or leather layer, as in  FIG. 16 , allows for more significant feel of the bladder that some riders may not like, and can also allow for the sensation of movement of the air cavities while riding. Thus, the use of a gel layer is optional. In many cases we it has been found that is thus most desirable to place the bladder in beneath a layer of gel, as in  FIG. 14 ; having the bladder between two gel layers or in the center or a molded gel, as in  FIG. 15 , also provides further stability for the bladder  14 . The preferred gel  18  is a low durometer polyurethane material, but silicone and other gel or gel-like materials can also be used in accordance with the present invention. Because the aforementioned low durometer materials are usually very tacky, it is desirable to cover the gel  18  with a surface treatment appropriate to the end-use, such as fabric, leather, and the like, to serve as a cover  38 .  
         [0068]     As to more specifics of encapsulating the bladder  14  in gel  18 , as in  FIG. 15 , there are a number of configurations that can be employed. The bladder  14  can placed in a mold and covered in gel. The resulting part will be a bladder  14  encased in gel  18 , and can be a flat part (when deflated), or the gel portion can be molded to have an ergonomically pleasing shape, so as to not be flat when the bladder  14  is fully or partially deflated.  
         [0069]     The bladder  14  can also be placed between two flat gel sheets. These sheets can have fabrics or films on one side with the other side being tacky, or can have both sides tacky by means of removing a release liner. In either case, the bladder  14  is positioned between the gels, where the tacky sides of the gel are adhered to the bladder  14 , and openings in the gel layer allow for the pumping mechanism to protrude. The exposed sides of the gel, if tacky, can be adhered to other materials, such as a top finish fabric or the base of the seat or seat cover, as will be described in detail below. Alternatively, the opposite side of the gel sheet may be designed to be the top or bottom layer of the seat or seat cover.  
         [0070]     Still further, either or both of the above mentioned gel sheets, can be molded instead of being of a flat configuration, such as  18  in  FIG. 15 . In this way, the gel  18  can again have a molded profile that is ergonomically pleasing even when the bladder  14  is fully or partially deflated. It is also possible, that a single layer of gel sheet can be used on the top of the bladder, and the bladder  14  is either adhered by glue to a bottom layer of the seat  10 , or the tacky top layer adheres the bladder  14  to the seat  10  through the open spaces around and within the bladder  14 .  
         [0071]     One or both sides of the bladder  14  itself may be constructed out of a gel sheet  18  that is weldable. In this case the gel  18  is formed with at least one side made with a weldable film layer. This gel sheet  18  may then be molded into the bladder  14  itself so it is possible that bladder itself is made of gel sheet material  18 .  
         [0072]     As stated above, a dome style pumping mechanism  20  is preferred because it has some advantages over other pumping mechanisms, however, many different types of pumps may be used and still be within the scope of the present invention. For example, non-dome type pumps may be employed. As seen in  FIG. 13 , an alternative integrated pumping mechanism  42  (also manufactured by Dielectrics) includes of a sealed pouch of film  44  that contains a piece of polyurethane open celled foam  46  at its center. The polyurethane foam  46  acts to spring bias the pouch  44  of film to an open condition to reinflate after pressing by the user. The usual release valve  22  is also preferably provided. This pouch  44  can be made in any appropriate shape and integrated into the air bladder construction. This pumping pouch  44  can be attached as a flap that hangs from the bladder  14  and can be tucked in the seat or underneath by hook and loop fasteners, or the like. Both the pouch  44  and dome pump  20  use a check valve assembly as part of the pumping mechanism. The dome-style pump, as seen in  FIG. 6 , can also be hung off the side on a flap like the pouch. In both cases the flap is still an integrated part of the bladder and is created while sealing the film sheets. Other similar types of mechanical pumping mechanisms and release valves could be utilized, so long as they are able to be integrated into the seat assembly to allow for one handed inflation and deflation.  
         [0073]     It should also be noted that the bladder of  FIG. 6 , can be affixed directly to the top surface of a seat  10  to effectively retrofit that seat  10  with an inflatable bladder  14 . Simply, the bladder  14  may be affixed in any fashion, such as by adhesive, for the example, the peel and stick type. Thus, the bladder will rest on the top of the seat  10  and be secured in place while providing the unique features of the present invention. In such cases, the bladder which is affixed to the top surface of the seat may be encased with gel or further covered in a layer of gel. It may also then be optionally covered in a layer of stretchable top surface material or fabricated skirt.  
         [0074]     As an alternative to the integrated mechanical hand pumping mechanism  20  or  42 , it is envisioned that an electric pump  50  can be used instead of the dome  20  or pouch type pumps  42  described above. An electric pump  50  is generally shown in  FIG. 22  with its associated release valve  22 . For example, a small battery operated electric pump  50 , such as those used in the wrist blood pressure cuff devices, can be employed. This electric pump  50  can be integrated into the bike seat  10 , as in  FIG. 22 , or a seat cover assembly  100 , shown and described below, and still provide the same desirable one handed operation. While  FIG. 22 , shows the release valve  22  for direct manipulation by the user, the unit can be inflated or deflated by an attached switch  52  strategically located on the seat  10  or seat cover, or by a remote control on the handlebars (not shown) or elsewhere. Thus, inflation and deflation of the bladder  14  may be electronic controlled in this embodiment.  
         [0075]     Further, with any automatic inflation device such as the electric pump  50 , the seat  10  can be automatically reconfigured during a ride. It is envisioned that with the addition of a simple electronic or mechanical control device  54 , as in  FIG. 22 , is electronically interconnected to the electric pump  50  and release valve  22 , which are electrically actuatable. The seat  10  can be set and programmed to dynamically change its inflation during the ride, shifting between several inflation pressures and/or seat shape configurations, or possibly between two separately inflatable bladders. The advantage of this automatically changing dynamic seat is that the bicyclist can remain comfortable without needing to personally adjust the seat. For example, the seat could be timed to relieve pressure points before they became noticeable or painful to the cyclist, as the seat cycles between various shapes and/or pressures to relieve any particular areas of pressure over the long term.  
         [0076]     Still referring to  FIG. 22 , additional pressure control and information can be provided. For example, a seat  10  or cover  100 , that incorporates the bladder configuration of the present invention, can have an on-board pressure readout  56 , such as in either an analog or digital display. This display may be alternatively located in an easily readable position via wires of wireless connection. This allows the user to select their seat pressure in a repeatable fashion. In addition, with the remote control version, the remote (not shown), which could be attached to the handlebars or any other convenient location, could display a pressure reading. As an alternative to a pressure gauge  56 , an inexpensive bleed off pressure valve  58  similar to what is seen on some tire compressors can be employed. In this case, the user can set this attached pressure dial to the desired setting, and then pump the seat  10  up either manually or electronically. Any pressure in excess of the setting is bled off, thus the pressure is established by the setting at which air bleeds off.  
         [0077]     Also, an automated mechanical pump can be used. A mechanical pump powered from the up and down bouncing of the rider could also be used in conjunction with the pressure bleed off valve configuration. For example, the dome pump  20  could ride against an impact member to cause this automatic mechanical pumping action. In this case, the rider sets the desired pressure on the bleed off valve  58 , and the seat  10  would stay pressured at that level through the pumping action caused by bouncing. A mechanical pump may be attached to the tire movement or pedals could also be used to deliver air to the bladder. In this configuration, the user control inflation and deflation through any of the methods mentioned earlier, such as a switch on the seat  10 , a remote control, or a pressure bleed off valve  58 .  
         [0078]     The unique bladder configuration  14  can also be adapted into a retrofittable cover  100  that can be installed on an existing bicycle seat  102  to provide that existing seat  102  with the unique contour profiling of the present invention. Such a cover  100  is shown in detail in  FIGS. 23-26 . The bladder is integrated into the add-on cover  100  using substantially the same bladder constructions described above. Details of such internal construction for this cover is not needed because it is the same as the seat discussed in detail above.  
         [0079]     As part of the cover  100 , as in  FIG. 23 , a relatively rigid fabric layer  104  serves as a base and is adhered to the bottom of the molded gel and bladder structure, as above. An appropriate finish layer  106  is provided on the outside of the cover  100 , as best seen in  FIG. 24 , such as a soft suede-like fabric that is adhered to the top of the molded gel and bladder structure. In  FIG. 24 , the inflated lobes  108   a ,  108   b  can be seen through the top fabric material  106  for contact with the rider. The top and bottom fabrics are stitched around the edges. As seen in  FIG. 25 , the dome pump  20  and release valve  22  of the encased bladder  14  (not seen) is allowed to extend through a hole  110  in the base side fabric  104 . A small fabric skirt  112  is sewn around the edge, as in  FIG. 23 , and contains a drawstring  114  to secure the skirt  112  to the rider&#39;s standard seat  102 .  FIG. 26 , shows a bottom view of the cover  100  secured to an existing seat  102  using the skirt  112  and drawstring  114 . It should be noted that other methods to secure the cover  100  to an existing seat  102  can be used.  
         [0080]     While the positioning of the pump  20 , such as a dome pump, in this particular cover configuration does not allow for adjustment during the ride, it does allow for easy adjustment before the ride and at when the rider stops to rest using the integrated pump  20 . The pump  20  can also be placed in a different location if mid-ride adjustments are desired, but this placement does provide for an extremely economical method of making a cover  100 , and from a practical standpoint, is desirable because it can be constructed from pre-existing bladders  14  that are used for the standard seat configuration, described above.  
         [0081]     The invention is intended to cover all types of configurations, not only ones that allow for mid-ride adjustment. This cover  100  can obviously be made using any of the alternative pumping mechanisms listed above, but specifically might be also made economically using the attached pouch pump  42  construction illustrated in  FIG. 13 .  
         [0082]     In summary, the present invention is unique in integrating air bladder technology into the construction of customizable profiles that allow the cyclist to relieve pressure in selected areas. It is also unique in allowing the user to dynamically customize the profile and firmness of the seat  10  or seat cover  100  before or during the ride. It is also unique in its combination of gel  18  and air bladder  14  together to create a lightweight stabile and comfortable seat  10  or seat cover  100 . It is contemplated that any or all of these features may be used together or separately to create a unique seat  10  previously unavailable with any of prior art seat  10  or cover  100  for a seat.  
         [0083]     While the specific examples of the invention provided above relate to a bicycle seat  10  or seat cover  100 , it is also contemplated that the invention is beneficial in other seat applications where any or all of the features of the invention would be desirable. Such other applications include motorcycle seats, tractor seats, horse saddles, wheelchair seats, office seats, portable or permanent stadium seats, automotive seats, and the like.  
         [0084]     It would be appreciated by those skilled in the art that various changes and modifications can be made to the illustrated embodiments without departing from the spirit of the present invention. All such modifications and changes are intended to be within the scope of the present invention.