Patent ID: 7216925

Claim:
In combination: a vehicle including a frame having rearward and forward ends, a cab, having rearward and forward ends, movably supported upon said frame whereby said rearward end of said cab may move upwardly and downwardly with respect to said frame; a cab suspension system positioned at said rearward end of said cab for exerting an upward force upon said cab; said cab suspension system comprising a lower frame member secured to said vehicle frame, an upper frame member secured to said cab, an adjustable inflatable air spring positioned between said upper and lower frame members for exerting an upwardly force upon said cab, said air spring being in communication with a source of air under pressure, an air valve operatively fluidly connected to said air spring which controls the flow of pressurized air into and out of said air spring, said air valve including an actuator; and a linkage operably secured to and extending between said upper frame member and said actuator; said linkage comprising: an elongated lower linkage member having upper and lower ends; said lower linkage member having external, vertically spaced-apart, alternating annular ridges and grooves formed thereon for at least a portion of its upper end; an elongated upper linkage member having upper and lower ends; said upper linkage member below its upper end having a generally C-shaped cross-section defining a gap; said upper linkage member having internal, spaced-apart, alternating ridges and grooves complementary to said external ridges and grooves on said lower linkage member; said upper end of said lower linkage member being able to be vertically adjustably snap-fitted through said gap to connect said upper and lower linkage members together.