Patent ID: 7484746

Claim:
A wheeled conveyance ( 2 ) comprising: a chassis ( 4 ); support means for a load mounted on the chassis ( 4 ); a suspension assembly mounted on the chassis ( 4 ) and comprising suspension arms ( 8 , 20 ) pivotably mounted on the chassis ( 4 ) and extending in forward and rearward directions in the region of opposite sides of the chassis ( 4 ), each suspension arm having a wheel ( 16 , 26 ) rotatably mounted at the free end ( 18 , 28 ) thereof, and two separate spring means ( 32 ), one disposed in the region of each side of the chassis ( 4 ), the free ends ( 18 , 28 ) of the forwardly and rearwardly extending suspension arms ( 8 , 20 ) being arranged to tend to pivot towards each other by means of the two separate spring means ( 32 ) being provided between, and acting on, the forwardly and rearwardly extending suspension arms ( 8 , 20 ); and two shock absorber means ( 38 ) separately cooperating between the chassis ( 4 ) and each of the suspension arms ( 8 , 20 ) extending in the forward direction, wherein the two shock absorber means ( 38 ) are provided in a substantially horizontal plane so as to limit and dampen tilting of the chassis ( 4 ) relative to at least part of the suspension assembly under dynamic load conditions tending to produce such tilting, upward and downward movement of the wheels ( 16 , 26 ) with the suspension arms ( 8 , 20 ) being substantially uninhibited by said two shock absorber means ( 38 ) in the absence of tilting motion of the chassis ( 4 ).