ADJUSTABLE MECHANIZED SEAT SUSPENSION

摘要

A seat suspension system (30) for supporting a seat support member (31) on a base member (32) includes support arms (46, 48) which cooperate with a spring suspension (76) so as to suspend loads imposed on the seat. The support arms are connected to one of the seat support member and base member by a support mechanism. A cam element (38) acts upon at least one of the seat support member and the base member and presents a cam surface (68) offering a resistance to the motion of the accompanying cam follower (72) which varies depending upon the height of the seat support member. The system preferably includes a height adjust mechanism (100) for adjusting the unloaded distance between the seat support member and the base member. The height adjust mechanism (104, 106) may be either a ratchet mechanism which is operated by lifting the seat support member, or a spring assisted mechanism (200) which is operable independently of the main suspension springs and which automatically biases an unloaded seat support member upwardly.