Abstract: A seat adjuster includes upper and lower track members having interfitting U-shape cross-section side portions which are slidably guided relative to each other by runners of low friction plastic material. The track members are slidably supported relative to each other by a shoe of the same material. A latch member includes a U-shaped locking portion which is receivable within slots in the side portions of the upper track member and a pair of a plurality of slots in the lower track member to releasably lock the track members to each other. Seat mounting brackets have hook shaped portions which are hooked to the base wall of the upper track member to releasably secure the brackets thereto. The brackets support a vehicle seat on the upper track member. One of the brackets has provisions for mounting seat belt restraints thereto with the loads imposed on the upper track member by such restraints being resisted by the interfitting side portions of the track members.

Abstract: A vertical seat adjuster for vehicle seats includes a seat support bracket. The rear portion of the bracket is supported on the vehicle by a lever which is rotatable through a screwjack mechanism to raise and lower the rear portion of the bracket. The front portion of the bracket is likewise supported on the vehicle by a rotatable lever. The front portion of the bracket mounts a pair of lock plates which are movable between engaged and released positions with respect to a detent mounted to the vehicle in order to lock the front portion of the bracket against movement. Each lock plate includes a series of alternating notches and abutments, with the notches and abutments of the locking plates being offset with respect to the other whereby the notch of one lock plate engages the detent to lock the bracket against movement while the abutment of the other engages the detent to maintain the other lock plate in released position.

Abstract: A vertical seat adjuster arrangement for vehicle seats includes spaced opposite hand mechanisms, each of which includes a seat support bracket. The rear portions of the brackets are supported to the vehicle by levers which are conjointly rotatable through a screwjack mechanism to raise and lower the rear portions of the brackets. The front portions of the brackets are likewise supported to the vehicle by conjointly rotatable levers. Each bracket mounts a lock plate which is movable between engaged and released positions with respect to a detent mounted to the vehicle in order to lock the front portions of the brackets against movement. Each lock plate includes a series of alternating notches and abutments, with the notches of one locking plate being offset with respect to the other to thereby obtain an increased number of adjusted positions of the brackets relative to the vehicle.