An eccentricity prevention apparatus for a pumping device is configured to prevent the eccentric movement of rotating parts operating for moving a seat up and down. The eccentricity prevention apparatus includes: a clutch device provided inside a housing; and an elastic member providing an elastic restoring force to the clutch device in a direction compensating for eccentric movement of the clutch device tilted relative to a rotating axis thereof.

An adjustment mechanism the includes a screw, a support having first and second transverse walls perpendicular to the screw, a casing having first and second end faces arranged facing the first and second transverse walls and having a nut housing which opens in opposite first and second openings, a first elastomer pad interposed between the first transverse wall of the support and the first end face of the casing, a second elastomer pad interposed between the second transverse wall of the support and the second end face of the casing, a nut screwed onto the screw, a bearing engaged in the second opening of the casing and traversed by the screw. The nut is in rigid abutment against the casing in the direction of the first opening and the bearing is in elastic abutment against the second elastomer pad.

A lumbar mat for a backrest structure for use in a vehicle seat, the lumbar mat adapted to be arranged between a lumbar support structure and a backrest cushion of the backrest structure, including a front surface adapted to face towards a backrest cushion of a backrest structure, when the lumbar mat is arranged in the backrest structure, a plurality of first spring elements arranged at the front surface of the lumbar mat, each of the first spring elements adapted to apply a first elastic force towards the backrest cushion via a first contact area of the first spring element, respectively, and a plurality of second spring elements, each of the second spring elements associated with a respective one of the plurality of first spring elements and adapted to apply a second elastic force towards the backrest cushion via a second contact area of the second spring element, respectively.

A cam assembly includes a pin, a first cam, a second cam, and/or a bearing. The first cam may be connected to the pin, and/or the second cam may be connected to the pin. A bearing may be configured to rotatable support the pin. The second cam may include a first portion and/or a second portion. The first portion of the second cam may be configured to contact a track in a first vertical position of the pin. The second portion of the second cam may be configured to contact said track in a second vertical position of the pin. The first portion may be vertically offset from the second portion. The first position of the pin may correspond to an unloaded state. The second vertical position of the pin may correspond to a loaded state.

A track assembly includes a track, a support member, a lever, and a slider. The support member may be configured for selective connection with the track. The lever may be connected to the support member, and the slider may be connected to the support member. The lever may be configured to limit movement of the slider and to limit movement of the support member. The slider may be configured to move longitudinally along the support member. The slider may be connected at a top of the support member. The lever may be configured to rotate about an axis that may be parallel to the track. The lever may include a top portion. The lever may include a first position and/or a second position. The slider may be configured to selectively contact the top portion of the lever when in a first position.

A swivel assembly for a vehicle seating assembly includes a fixed plate defining a first opening. A rotating plate defines a second opening. The rotating plate is positioned substantially parallel to the fixed plate. A gear ring is positioned about a periphery of the first opening. An inner retaining bracket is received by the first and second openings and is coupled with the gear ring. An outer retaining bracket is coupled with the rotating plate and defines a channel. The fixed plate is at least partially received by the channel. A washer is positioned between the fixed plate and the rotating plate. A bearing member includes first and second legs. The first leg is positioned between the rotating plate and the fixed plate. The second leg is positioned between the fixed plate and the inner retaining bracket.

A work vehicle includes a driver's seat attached to a seat base, a support shaft attached to the seat base and extending in a vehicle body transverse direction, the support shaft pivotably connecting the seat base with the vehicle body frame, and an isolator mounted on the support shaft to absorb only vibration in a vehicle body front/rear direction.

A recliner heart for a vehicle seat recliner assembly may include a first plate, a second plate and one or more pawls. The first plate may define a recess. The second plate may include a first inner diametrical surface having first teeth formed thereon. The pawl may be slidably disposed in the recess between a secure position in which the pawl is engaged with a portion of the teeth of the second plate to restrict relative rotation between the first and second plates and a release position in which the pawl is disengaged from the portion of the teeth of the second plate to allow relative rotation between the first and second plates. One or both lateral sides of the pawl may include one or more slots.

A vehicle seat includes a lifter device lifting/lowering a seat cushion. The lifter device includes a link member coupling a side frame and a riser to each other, and a clinching pin coupling the riser or the side frame and the link member to each other. The clinching pin includes a first portion located on the opposite side of the link member from the riser, a second portion located in a position corresponding to a hole of the link member, a third portion located in a position corresponding to a hole of the riser, and a fourth portion that is located on the opposite side of the riser from the link member. A surface of the second portion facing the riser has a portion adjacent to the third portion, and the portion is away from a surface of the riser facing the second portion.

A longitudinal adjuster (10), for a vehicle seat (1), includes at least one pair of rails (12), formed from a lower seat rail (14a) and an upper seat rail (14b). The seat rails mutually engage around each other and are movable relative to each other in a longitudinal direction (x) and are lockable to each other by a locking device (16). The locking device has at least one latching plate (18), which is movable in the vertical direction (z). The latching plate has a guide pin (20) protruding in the vertical direction. The upper seat rail has an opening (22) aligned with the guide pin. A guide sleeve (24) extends into a cavity between the seat rails and is accommodated in the opening. The guide pin is guided by the guide sleeve. The upper seat rail and the guide sleeve are connectable by a bayonet catch.