Abstract: A chair chassis includes: a base, provided with an accommodation chamber; a backrest support; a memory stopper, disposed on the backrest support, wherein the memory stopper is provided with a first arc surface facing the base; a locking slider, slidably disposed in the accommodation chamber of the base, wherein the locking slider is provided with a second arc surface disposed opposite to the first arc surface, and a side of the locking slider is provided with a first rack; a first elastic member; and an elastic slider, slidably disposed in the accommodation chamber of the base, wherein one end of the elastic slider is provided with a second rack, wherein the second rack is meshable with the first rack. Accordingly, the chair chassis according to the embodiments of the present disclosure achieves reclination memory adjustment of a backrest of the chair.

Abstract: A method is described for adapting a position of a seat device of a passenger of a vehicle during and/or prior to a switchover of the vehicle from an automated driving mode to a manual driving mode, the method having at least a step of providing, in which an adjustment signal is provided to an interface to a seat device of the vehicle using a transition signal and a position signal, and the adjustment signal causes a change in the position of the seat device from a comfort position to an upright position, and the transition signal indicates or represents an upcoming transition from an automated driving mode to a manual driving mode of the vehicle, and the position signal indicates or represents the position of the seat device of the passenger, the provision of the adjustment signal taking place when the position signal indicates or represents the comfort position, and/or the provision not taking place when the position signal indicates or represents the upright position; and/or providing a blocking signal in

Abstract: 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.

Abstract: A seat may be obtained with good operability of plural operating members for operating plural adjustable units. A vehicle seat is provided with: a seat lifter, provided to a seat body for sitting on and adjustable by operation force transmitted from a first operating system; a reclining mechanism, provided to the seat body and adjustable by operation force transmitted from a second operating system; and an operation force imparting unit that is provided at a position where it is able to be operated by a seat occupant at a predetermined position on the seat body. The operation force imparting unit is able to independently take up a first state in which a lifter knob is operated and the seat lifter adjusted, and a second state in which the reclining lever is operated and the reclining mechanism adjusted.

Abstract: A seat may be obtained with improved operability of plural adjustable units. A vehicle seat 10 is provided with: a seat lifter 22 provided to a seat body for sitting on, adjustable by transmitted operation force; a reclining mechanism 20 provided to the seat body, adjustable by transmitted operation force; and an operation lever 30, to which operation force from operation by a seat occupant is input; and a switching mechanism 50 that is able to selectively switch between a first state in which operation force of the operation lever 30 is able to be transmitted to the seat lifter 22, and a second state in which operation force of the operation lever 30 is able to be transmitted to the reclining mechanism 20.

Abstract: A seat operation device having improved operability of both a height adjustment mechanism and an angle adjustment mechanism, and a seat. The vehicle seat (10) has a seat lifter (22) that is provided at a seat body for seating and is adjusted by operation force transmitted, a reclining mechanism (20) that is provided at the seat body and is adjusted by operation force transmitted, and an operation lever (30) that adjusts the seat lifter (22) and the reclining mechanism (20). The operation lever (30) can take both a first predetermined position and a second predetermined position. At the first predetermined position, operation force by operation of a person seated can be transmitted to an operation load input section (28) of the seat lifter (22). At the second predetermined position, operation force by operation of the person seated can be transmitted to a reclining release plate (38) of the reclining mechanism (20).

Abstract: A pumping device and a height adjuster for a vehicle seat are disclosed. The pumping device comprises a support plate; a cam receiver accommodated in the support plate; a brake cam received in the cam receiver to be integrally rotated with the shaft, and defining receiving spaces between the brake cam and the cam receiver; locking means received in each receiving space to allow and prevent rotation of the brake cam in the cam receiver; a control plate for applying the pushing force to the locking means; a bidirectional clutch coupled to the control plate if rotating force is applied and returned to a state of being decoupled from the control plate if the rotating force is not applied; a cover plate assembled with the support plate; a lever plate provided outside the cover plate; and elastic returning means for returning the lever plate to a predetermined reference position.

Abstract: The present invention relates to a leveling valve including a first port, a second port, a third port, a valve, and a clutch. The clutch is provided with an engaged position and a disengaged position. At least a portion of the clutch may move relative to the valve when the clutch is in the disengaged position. The clutch moves the valve when the clutch is in the engaged position. The valve is movable between a first position, a second position, and a third position. When the valve is in the first position, the valve blocks a first pathway, which extends from the first port, from connecting with a second pathway, which extends from the second port. When the valve is in the second position, the valve allows the first pathway to connect with the second pathway. When the valve is in the third position, the valve allows the second pathway to connect with a third pathway, which extends from the third port.

Abstract: An adjustment assembly including a 2 in 1 activating lever that has two operating positions, a forward position and a rearward position. The 2 in 1 activating lever is operatingly coupled to a bracket including a first and second cam that are operatingly coupled to an inner and outer rotating shaft. In the forward position, the movement of the 2 in 1 activating lever upward or downward causes the first cam and inner rotating shaft to rotate clockwise or counterclockwise. In the rearward position, the movement of the 2 in 1 activating lever upward or downward causes the second cam and outer rotating shaft to rotate clockwise or counterclockwise. The adjustment assembly may be utilized on an automotive seat assembly to control both the seat height and seat inclination angle.

Abstract: A seat may be obtained with improved operability of plural adjustable units. A vehicle seat 10 is provided with: a seat lifter 22 provided to a seat body for sitting on, adjustable by transmitted operation force; a reclining mechanism 20 provided to the seat body, adjustable by transmitted operation force; and an operation lever 30, to which operation force from operation by a seat occupant is input; and a switching mechanism 50 that is able to selectively switch between a first state in which operation force of the operation lever 30 is able to be transmitted to the seat lifter 22, and a second state in which operation force of the operation lever 30 is able to be transmitted to the reclining mechanism 20.

Abstract: A seat may be obtained with good operability of plural operating members for operating plural adjustable units. A vehicle seat 10 is provided with: a seat lifter 22, provided to a seat body for sitting on and adjustable by operation force transmitted from a first operating system; a reclining mechanism 20, provided to the seat body and adjustable by operation force transmitted from a second operating system; and an operation force imparting unit 28 that is provided at a position where it is able to be operated by a seat occupant at a predetermined position on the seat body. The operation force imparting unit 28 is able to independently take up a first state in which a lifter knob 32 is operated and the seat lifter 22 adjusted, and a second state in which the reclining lever 30 is operated and the reclining mechanism 20 adjusted.

Abstract: The seat back unit has a seat back frame which can be tilted around the tilting axis (11) of the support (21). Movable on the seat back frame (13) is the seat back (25). A linear motor (33) serves to incline the seat back frame (13) together with the seat back (25). With a linear motor (33) the distance between the support (21) and the connecting section (17) of the back frame (13) can be reduced or increased, respectively. A tape (43) extends from a stationary part (45) of the linear motor (33) via the connecting section (17) to the seat back carrier (44). Accordingly, if the seat back frame (13) is tilted towards the rear, the seat back (25) is moved downward together with the arm rests (29) attached to the seat back carrier (44). A stabilizing mechanism (51) keeps the arm rest (29) in a practically horizontal position. Accordingly, on reclining the arms of the user remain always in a practically horizontal position and are finally lowered to a position practically parallel to the body.

Abstract: A reclining seat includes a base, a back frame and back support connected to the back frame for translation relative to the back frame. In a first embodiment, a mechanism is provided to couple the back frame to the back support such that rotation of the back frame relative to the base automatically translates the back support relative to the back frame. In a second embodiment, a mechanism is provided to allow a user to control movement of the back support independently of back frame rotation. Preferably, the reclining seat is incorporated into a wheelchair.

Abstract: The present assembly relates to a link assembly for a chair. The assembly includes a frame link for connecting to a frame of the chair and a back support link for connecting to a back support of the chair. The frame link and the back support link are pivotably connected in order to facilitate displacement of the back support according to movement of a back frame of the chair. An adjustable pivot point is located on one of the links for selectively adjusting the extent of displacement of the back support relative to the back frame.

Abstract: A reduced shear reclining seat back assembly employs a single rotary actuator for reclining a seat back relative to a seat portion and controlling movement of a seat back member in response to the reclining operation. A rotary actuator includes a first arm pivotally secured to the seat back, preferably through a link which is connected to the movable back member. A second arm of the actuator is pivotally secured to the seat portion. As the angle between the first and second arms decreases, the seat back reclines and the movable seat back member is drawn toward a seat pivot axis. Likewise, when the angle between the arms increases, the seat back is brought to an upright position and the movable seat member travels away from the seat pivot axis.

Abstract: A reclining chair that avoids skin shear. The reclining chair has a seat, a backrest, and a backrest surface. The backrest is pivotably attached to the seat. The backrest surface is slidably mounted with respect to the backrest. Pivoting of the backrest with respect to the seat causes the backrest surface to slide with respect to the backrest. Sliding of the backrest surface with respect to the backrest maintains the backrest surface at a constant position relative to a back of a person sitting on the reclining chair.

Abstract: A chair primarily for use by persons with spinal chord injury, comprises a universally positioned chair back and a universally positioned front support. Users sit upright and are held between the chair back and front support. Both the chair back and front support have sides to prevent users from falling to their sides. A tray also may be attached to the front support. The seating surface also adjusts vertically to the base and floor. Articulating arms attach the chair back and front support to other chair parts. The arms allow easy vertical, horizontal and angular movement of the chair back and front support, and the arms can be locked to secure the back and support.

Abstract: An angularly adjustable backrest mounting assembly for a seat, has an upper transverse member securable at opposite ends to transversely spaced uprights of a seat so as to be angularly movable about a horizontal axis, and a lower transverse member is securable at opposite ends to the transversely spaced uprights below the upper transverse member. An upright member is secured adjacent an upper end thereof to the upper transverse member and adjacent a lower end thereof to the lower transverse member, and a transverse angle retaining member pivotably secured at opposite ends to opposite ends of the upper transverse member is adjustably securable at different heights to the upright member to enable the upper transverse member and the upright member to be retained in the different angular positions. The upright member has attachments to enable a backrest to be secured thereto.

Abstract: The apparatus is a biomechanical body support including a substructure, a seat which is supported by said substructure and is tiltable relative to said substructure, a backrest which is coupled to said seat and is tiltable relative to said seat, the tilting axis of the backrest approximately coinciding with the pivotal point of the hip joint of a person resting on said seat, as well as a leg support also tiltably connected to said seat.

Abstract: A wheelchair having a backrest assembly that is pivotally connected adjacent the rear end of its seat frame. The back assembly has a rear panel fixedly attached thereto and there is structure on the front surface of the rear panel which connects to structure on the rear surface of the front panel which allows the front panel to reciprocally travel upwardly and downwardly with respect to the rear panel. There is structure for forcing reciprocal movement of the front panel and this is attached to the rear surface of the front panel and this is made possible by the cutout slot in the rear panel. The wheelchair has structure for forcing the back assembly to recline rearwardly and this is coupled together with the structure for forcing the reciprocal movement of the front panel of the back assembly so that their travel is coordinated to operate together.

Abstract: A seat, which is transformable into a berth for a vehicle comprises a horizontal seat member and a seat back connected to the support of the seat member by an articulated linkage. The linkage maintains the lower portion of the seat back in permanent contact with the rear portion of the horizontal seat member during the pivoting movement of the seat back, from an upstanding position to a position in which the surface of the seat and member of the seat back are in alignment.

Abstract: A backrest for use with devices having cycle-type seats mounted on support posts, such as exercise machines, bicycles, tricycles, stools and the like, in which the back support is pivotally attached to a support frame and the support frame is selectably adjustable in height and in angle with respect to the seat of said machine. The support frame is adjustably secured to a yoke which in turn is clamped to the support post of the seat.

Abstract: The invention relates to a vehicle seat whose frame is formed by a shell made from moulded plastic material.This shell is formed from two half-shells, one for the sitting portion 1 and one for the seat back 4 and these two half-shells comprise complementary slide elements 10-13 adapted to slide against each other and centered on the same transverse horizontal axis disposed in the vicinity of the pivoting axis of the hips of the person sitting in the seat, these elements being associated with a mechanism 18, 19 for adjusting and locking their mutual sliding positions.

Abstract: A vehicle seat comprises a seat assembly including a seat pan, a backrest assembly including a backrest pan, a backrest height adjustment mechanism connected between the seat pan and the backrest pan and including a height adjustment knob, and a backrest tilt adjustment mechanism connected between the seat pan and the backrest pan and including a tilt adjustment knob. The backrest pan can be tilted regardless of its vertical position relative to the seat pan and can be moved vertically regardless of its tilted position relative to the seat pan. The tilt adjustment mechanism further includes a connector assembly connected to and tiltable in response to rotation of the tilt adjustment knob and including a pair of relatively slideable connector members, one of the connector members being connected to the tilt adjustment knob and the other of the connector members being connected to the backrest pan.