Abstract:
The Dive Caddy is a two wheeled land vehicle with it&#39;s primary purpose being to transport scuba diving equipment across tough terrain such as sandy beaches, rocky trails, and other hard to traverse, or reach scuba diving, or free diving locations. It is different than other prior carts in as that it has a breaking system for traveling down hills, And can be fitted with an auxiliary battery powered booster motor to traverse uphill, or help bring itself out of hard to exit situations, and also has a bench seat to stage a completed scuba unit for the diver to sit on while dawning his equipment. Another new feature of the Dive Caddy is that it has the ability to change tires for different types of terrain, be it sandy beaches, rocky hills, or mud, the Dive Caddy can adapt to them all.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
   Not Applicable 
   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   With the increase in popularity of scuba diving for sport, came an increase in need for devices to transport all of the equipment necessary for one or more divers to an increasing number of dive sites. Typically, divers are limited to areas where they can drive to, or load their gear on a boat with a lot of work involved in getting all their gear to the actual site, or the boat. Many possible great dive sites are overlooked due to the logistics of getting the equipment to the site easily, and staged for diving. The Dive Caddy facilitates the ability for divers to load their dive gear, even before leaving home, on the Dive Caddy, transporting the equipment close to the site, and once staged there, using the Dive Caddy to get the gear to whatever actual site the diver chooses to use. 
   2. Description of Related Art 
   There are several other carts on the market that are designed to help carry dive gear to diving sites. Many of them are listed below. Problems with existing carts are several. Most have very small tires that make it hard to pull the equipment over a sandy beach, or up and down rocky terrain and trails. Another problem is not having the efficiency and convenience of pre-loading the cart at home, and being able to secure it in your vehicle ready to use once you reach the site. 
   Related US Patents
         U.S. Pat. No. 3,301,570 Berman 280/47.131   U.S. Pat. No. 6,341,789 B1 Checa 280/47.280   U.S. Pat. No. 6,047,983 Day III 280/652   U.S. Pat. No. 4,098,416 Fawley 414/453   U.S. Pat. No. 5,431,422 Gamache 280/47.190   U.S. Pat. No. D374,533 Read D34/24   U.S. Pat. No. 3,679,227 Rock 280/47.240       

   Another problem is the cumbersome activity of dawning your fully assembled scuba unit once you are on site. Even with a partner, it is easier to put on your dive gear if you have a stable platform to sit on. 
   BRIEF SUMMARY OF THE INVENTION 
   Although several other carts, and similar devices have been designed to assist in their effort, this cart adds several advantages that they don&#39;t. 
   The Dive Caddy is designed to travel easily over sandy areas, as some of the other carts do. It is also able to travel easily up and down trail systems well, as it is equipped with Mountain bike style tires, and a similar breaking system for slowing the loaded cart going down hills. One option for the Dive Caddy will be an optional battery powered electric motor to assist in getting out of muddy areas, or traveling uphill. It also will work very well at Motels, Hotels, Dive shops with great distances to the boat, and on Ferry Boat systems, such as the San Juan Islands in Washington State, all of which are places of great difficulty to reach for the sport diver. 
   An added feature of the Dive Caddy is the forward staging area where a diver is able to secure his or her assembled scuba unit, sit down on the provided seat, in front of the assembled unit, and don the unit. Under the bench seat is an adjustable leg that allows for changing the height of the seat for different sized divers. This makes donning your scuba unit much easier, and easier for your dive partner who will be assisting you. 
   Divers typically carry one or two duffel bags with gear which can be stored on the cargo net area behind the cylinder staging area, and over the tank storage area. 
   Another feature of the Dive Caddy is the loading handles which allow two people, one on each side of the cart, to pick it up fully loaded, and place it in the back of a pickup truck, or other vehicle, and ratchet tie it down for transportation to the dive site. 
   The Dive Caddy also has a small toolbox on board for maintenance and repair. 
   Also, The dive Caddy has a harness system for the operator to help disperse the load of the weighted cart, and assist with controlling it while traveling on rough terrain. 

   
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
       FIG. 1A  is a side view of the cart depicting items  1 - 10   
       FIG. 1B  is an overhead view of the cart depicting items  11 - 19   
   

   DETAILED DESCRIPTION OF THE INVENTION 
   Two wheels are used as shown in Item  1 , fitted with a rubber mountain bike type tire for rough terrain, a balloon type tire for sandy beach like applications, or any other type tire needed for any terrain encountered are used here. This wheel assembly is mounted on an axle of size and strength as to satisfy all structural, functional, and safety needs. This axle is attached to the wheel fork assembly. 
   As shown in Item  2 , the wheels are attached to a wheel fork assembly, which can be made from standard mountain bike parts. The forks are attached to wheel on each side of the wheel just like on a bicycle, with nuts tightened on to the axle which is part of the wheel assembly. This wheel fork assembly is then attached to a u shaped cross member that pivots on the main frame of the cart. This is held in place by collars fixed to the cart allowing the two frames, main cart frame, and wheel fork frame, to be attached to each other, but still allowing the wheel fork frame assembly to rotate up and down being controlled by the shock absorption system. All framework is made from 1″½ metal tubing, or any other material suited for this application. All materials used to be corrosion resistant and meet necessary structural and safety requirements. 
   As shown in Item  3 , the breaking system is attached to the wheel fork assembly in a similar fashion as would be on a mountain bike, or other bicycle. It operates in a similar fashion as well, and has a cable running to a lever on the handle bar assembly. Pulling this lever draws the two brake pads into the wheel causing friction and the slowing of the cart, and releasing the lever frees up the wheel. This is really nice for traversing down long inclines. The wheel shown in Item  1 , the fork assembly shown in Item  2 , and the breaking system shown in Item  3 , are collectively called the wheel fork assembly. 
   As shown in Item  4 , the cargo net frame, supported by hinges on the vertical brace frame, is the main support system for the cargo net, which carries gear and equipment over the cylinder storage area. The cargo net and frame are raised to allow dive tanks to be secured in the cylinder storage area under the cargo net frame, and then lowered and secured in place by a locking device. This is the normal mode for transporting gear. Once again, all framework is to be made from 1″½ tubular metal, or any other material suited for this application. All materials used to be corrosion resistant and meet necessary structural and safety requirements. 
   As shown in Item  5 , the adjustable shoulder and body harness system is designed to take weight off of the operator&#39;s hands and arms, and redistribute that weight onto his or her shoulders and hips. 
   The harness is adjustable length and in width, and attaches to the handlebars with swivels for more maneuverability. The harness is made of nylon or other similar material for lightweight use and strength. The harness is used by unbuckling the chest strap on the front of the harness, sliding the left arm in under the left shoulder pad, and then sliding the right arm in under the opposite shoulder pad on the right side. Then securing the chest strap buckle. 
   As shown in Item  6 , the scuba unit clamp and base assembly is used to hold in place the assemble scuba unit for the diver while donning. It is supported in place by the vertical bracing system Item  14 , and the main cart frame assembly Item  18 . It is used while the diver is sitting down on the staging area seat Item  12 . The clamp assembly can be made from existing clamps available on the market. This area can also be used for additional storage when in transport mode. 
   As shown in Item  7 , the forward strut assembly consists of an upper receiver tube, lower foot tube, and a forward brace. The upper receiver tube is fitted with holes that line up with the hole in the lower foot tube to allow it to be pinned at different lengths to adjust the height of the seat above where the diver sits to don his or her assembled scuba unit. This assembly is attached to the main frame Item  18 , at the top of the receiver tube, and at the top of the forward brace. There is a foot on the bottom of the foot tube that distributes the forward weight of the cart to the ground evenly. This foot is fitted with a rubber shoe to prevent slipping and sliding. This assembly is also fabricated out of tubular steel. 
   As shown in Item  8 , the cylinder storage holding brackets are attached to the main frame Item  18 , by a tubular steel bracing system, and designed in two pieces consisting of an upper half circle, and a lower half circle. These two pieces are hinged on one side and secured with wing nuts or clamps on the other side. They swing up and open to allow the cylinder to be placed inside, seated on the rubber inner lining. 
   As shown in Item  9 , the tool storage area is located at the rear of the cart and is attached to the main cart frame assembly Item  18 . It is removable, and houses necessary tools for small repairs and maintance of the dive cart. 
   Item  10 , shows the shock absorption system is attached to the wheel fork system Item  2 , and the main cart frame assembly Item  18 . It provides a smooth ride for transporting the scuba equipment over rough terrains. The complete shock absorption system is comprised of the shock absorber itself, a lower mounting bracket, an upper mounting bracket, and rubber pads with metal covers on both ends of the shock absorber fastened with nuts to the main cart frame assembly, and the wheel fork assembly, to provide shock absorption between the shock absorber itself, and the frame of the cart. 
   As shown in Item  11 , the wheel break system operating cable is connected to the breaking system item  3 , and the breaking lever, attached to the handlebar assembly Item  13 . There is one cable running down each of the two handlebars to actuate each of the two breaking assemblies separately. 
   As shown in Item  12 , the seat is positioned in a way so that while the cart is stationary, the diver can put his or her assembled scuba unit in the scuba unit clamp and base assembly, sit down on the Dive Caddy in front of the scuba unit, and put it on without having to have his or her partner help with donning the gear. This seat can be made from mold injected plastic, or nylon webbing. 
   As shown in Item  13 , the handlebar assembly is connected to the main cart frame Item  18 , by a locking swivel device Item  16 , and hosts the break cable assembly Item  11 , the break control levers, and the shoulder harness assembly. It also has rubberized handgrips to prevent slippage while carrying the cart. The handlebar assembly has the ability to rotate 180 degrees back to the main cart frame to allow ease of storage during transportation in a secondary vehicle. 
   As shown in Item  14 , the vertical bracing system houses the hinges for the cargo net frame Item  4 , the upper spring clamp assembly, and the tank staging base, allowing the scuba cylinder on the assembled scuba unit to be held vertically while being donned. This frame also adds structural support to the cart, while also defining between the forward scuba units donning area Item  6 -Item  12 , and the rear tank storage and cargo area Item  4 -Item  17 . 
   As shown in Item  15 , the loading handles are welded to the sides of the main cart frame allowing for ease of loading into a secondary vehicle. One person gets on each side of the cart; a grab a forward and rear handle, and then lifts the loaded cart into a secondary vehicle. Then tie down straps are used to secure the cart into the vehicle. 
   As shown in Item  16 , the locking swivel device is attached to the main cart frame Item  18 , and the handlebar assembly Item  13 . This device also has increments allowing it to be adjusted farther apart at the ends where the operator stands if more room is needed. The swivel rotates 180 degrees folding back the main cart frame for ease of storage while transporting, and also allowing more room for a second unit in the back of a pickup truck or other vehicle. 
   As shown in Item  17 , the scuba cylinders are being stored under the cargo net area, and are held in place by the cylinder storage brackets Item  8 , and the main cart frame item  18 . A skid plate is also in place directly beneath the cylinder valves to protect them while in transportation mode. They are accessed by raising the cargo net frame Item  4 , and retrieving the cylinders from the cylinder storage holding brackets. 
   As shown in item  18 , the main cart frame assembly is made from 1½″ tubular metal framing of a corrosion resistant, and structurally sufficient size and type. It shall also meet any and all safety requirements needed. The main cart frame carries the suspension arm for the wheel fork assembly Item  2 , and also receives the upper bracket for the shock absorption system Item  10 . It also houses the seat for the scuba unit donning area Item  12 , and is attached to the vertical brace frame Item  6 , which supports the scuba unit clamp and base assembly. The main cart frame also supports the cylinder storage holding brackets Item  8 . In essence, the main cart frame is the support system for the entire Dive Caddy cart. 
   As shown in Item  19 , these are the skid plates for the cylinder valve assemblies. They are attached to the wheel fork assembly arm, and are made from corrosion resistant plate steel. They may also be fitted with rubber padding to prevent unnecessary damage to cylinders while being transported.