A wheelchair having a front and back end and a left and right side, said wheelchair comprising:
- a front wheel assembly including:
- a left front wheel and a right front wheel, each said front wheel located at said front end of said wheelchair, said left front wheel located on said left side of said wheelchair, and said right front wheel located on said right side of said wheelchair;
- a left steering caster assembly, said left steering caster assembly connected to the center of said left front wheel and including:
- a left steering caster perpendicular portion which extends inwardly and perpendicularly from a hub at the center of said left front wheel;
- a left steering caster parallel portion which is parallel to said left front wheel, said left steering caster parallel portion extending forwardly from said left steering caster perpendicular portion;
- and,
- a left steering caster curved portion extending forwardly and upwardly from said left steering caster perpendicular portion, said left steering caster curved portion having a turn axle stub attached to its upper end;
- a right steering caster assembly, said right steering caster assembly connected to the center of said right front wheel and including:
- a right steering caster perpendicular portion which extends inwardly and perpendicularly from a hub at the center of said right front wheel;
- a right steering caster parallel portion which is parallel to said right front wheel, said right steering caster parallel portion extending forwardly from said right steering caster perpendicular portion;
- and,
- a right steering caster curved portion extending forwardly and upwardly from said right steering caster perpendicular portion, said right steering caster curved portion having a turn axle stub attached to its upper end;
- a front camber tube assembly having:
- a center portion having a left end and a right end,
- a left portion having a left end and a right end, said left end of said left portion pivotally attached to said turn axle stub and the front end of said parallel portion of said left steering caster to form a left steering pivot, said left portion including a left wheel stopper attached at the center of said left portion and extending arcuately toward said left steering caster parallel portion, said left wheel stopper having a rubber plug at its end;
- a right portion having a left end and a right end, said right end of said right portion pivotally attached to said turn axle stub and the front end of said parallel portion of said right steering caster to form a right steering pivot, said right portion including a right wheel stopper attached at the center of said right portion and extending arcuately towards said right steering caster parallel portion, said right wheel stopper having a rubber plug at its end;
- and,
- said left and said right portions extending inwardly and forwardly such that they connect with said center potion at its left and right ends, said right end of said left portion connected to said left end of said center portion and said left end of said right portion connected to said right end of said center portion;
- and,
- a linkage assembly having a linkage rod, a left wheel link and a right wheel link, said linkage rod having a left end and a right end, each said wheel link having a left and a right end, said right end of said left wheel link connected to said left end of said linkage rod and said left end of said left wheel link connected to said perpendicular portion of said left steering caster, said left end of said right wheel link connected to said right end of said linkage rod and said right end of said right wheel link connected to said perpendicular portion of said right steering caster;
- a tubular frame assembly including:
- a main frame member having a forward and rear end, said forward end of said main frame member attached to and extending perpendicularly and rearwardly from the center of said center portion of said front camber tube assembly;
- a seat support having an upper end and a lower end, said lower end of said seat supporting member attached to said rear end of said main frame member and extending diagonally upwardly and rearwardly therefrom;
- a swing arm support member including:
- a first portion with an upper and a lower end extending upwardly from said rear end of said main frame member;
- a second portion with an upper and a lower end, said lower end of said second portion attached to said upper end of said first portion and extending rearwardly and upwardly, said second portion having a hole to receive a latching device;
- a seat tube having a front and a rear end, said seat tube attached to said upper end of said second portion and extending rearwardly;
- and,
- a seat mount extending upwardly from said seat tube;
- a frame shock mount which includes two tabs extending upwardly from said main frame member, each of said tabs having a hole for receiving a latching device;
- and,
- a pneumatic cylinder having an upper and a lower end, each end having a hole for extending a latching device therethrough, said lower end of said pneumatic cylinder being attached to said tabs by a latching device extended through said hole in said lower end of said pneumatic cylinder and said holes in said tabs;
- a rear wheel assembly including:
- a left rear wheel and a right rear wheel, each said rear wheel located at said rear end of said wheelchair, said left rear wheel located on said left side of said wheelchair, and said right rear wheel located on said right side of said wheelchair, said rear wheels larger than said front wheels;
- a rear camber tube having a left and a right portion, each said portion having a left and a right end, said left end of said left portion of said rear camber tube connected to said left rear wheel, said right end of said right portion of said rear camber tube connected to said right rear wheel;
- an axle extending through said camber tube, said axle having a left and a right end, said left end of said axle attached to said left rear wheel, and said right end of said axle attached to a said right rear wheel;
- and,
- a swing arm pivotally attached to said second portion of said frame assembly, said swing arm including:
- a left and a right shock arm, each of said shock arms having a forward end and a rear end, said rear end of said left shock arm extending inwardly and forwardly from said left portion of said rear camber tube at a point near said left end of said left portion of said rear camber tube, said rear end of said right shock arm extending inwardly and forwardly from said right portion of said rear camber tube at a point near said right end of said right portion of said rear camber tube;
- a left and a right pivot arm, each of said pivot arms having a front and a rear end, said left pivot arm extending forwardly from said left shock arm, said right pivot arm extending forwardly from said right shock arm;
- a spreader bar extending between said front end of said left pivot arm and said front end of said right pivot arm;
- a pivot arm shock mount including an inward projection from each of said pivot arms, each inward projection having a hole for receiving a latching device, said upper end of said pneumatic cylinder attached to said projections by a latching device extended through said holes in said upper end of said pneumatic cylinder and said holes in said projections;
- and,
- a swing arm pivot including a latching device passing through holes in said left pivot arm, said second portion of said frame assembly, and said right pivot arm;
- and,
- a chair assembly.