Abstract: Described are adjustable seats including an upper frame with a pair of support arms, a lower frame with a pair of support legs, and a coupling system with an upper rod and a lower rod. As examples, the upper rod and the lower rod are pivotally coupled to each of the pair of support arms and the pair of support legs. A linear actuator is coupled to the upper frame, and a track is coupled to the lower frame, wherein the linear actuator is configured to travel along the track. The linear actuator may comprise a first end and a second end, wherein the first end is coupled to a coupling location on the lower frame and the second end is coupled to a coupling location on the coupling system.

Abstract: A seat assembly for improving posture of a user comprises a substantially firm seat portion angled downwardly from rear to front, a back support extending upwardly in a rear area of the seat portion, a pad positioned on the back support and, the back support positionable at at least two locations for varying seat depth.

Abstract: Provided is a linkage mechanism for a recliner that includes a seat-mounting plate, a base plate vertically supported by high-legs, a footrest assembly adapted to extend ottoman(s) forward when the recliner is adjusted from a closed to an extended position, and a seat-adjustment assembly. The seat-adjustment assembly includes an ottoman drive link that has a front end pivotably coupled to the footrest assembly and a rear end pivotably coupled to a mid section of a connecting link. The connecting link further includes a front end rotatably coupled to a forward portion of the base plate and a rear end rotatably coupled to a lower end of a rear pivot link. The rear pivot link further includes an upper end that is pivotably coupled to a rearward portion of the seat-mounting plate. The combined operation of three links above locates the seat-adjustment assembly above the base plate's lower edge during adjustment.

Abstract: Describes are passenger seats including a seat pan assembly with a reclining mechanism, a seat back pivotally coupled to the aft end of the seat pan assembly, and a lumbar mechanism coupled to the seat back and/or the seat pan assembly. As examples, the seat pan assembly includes at least one track having a reclining path and a sleeper path, and a sleeper selection control configured to pull a diverter into a position substantially blocking the opening to the reclining path and to push the diverter into a position substantially blocking the opening to the sleeper path. In certain cases, the seat pan assembly also includes a tilting mechanism with a fixed component and a variable component adjustably engaged with each other.

Abstract: A seat comprising a seat support for receiving and bracing a seat plate, which comprises a rear region and a front region, the rear region, which receives the ischial bones (os ischii), being arranged lower than the front region and the seat support supporting the rear region, wherein the front region of the seat plate is formed resiliently as a flexible zone without direct supports.

Abstract: Embodiments of the present invention generally relate to transfer benches and, more particularly, to a transfer bench adapted to facilitate the movement into and out of an enclosure, such as a bathtub, by persons having limited mobility. In one embodiment of the present invention, a transfer bench comprises a first seating section, a second seating section rotatably coupled to said first seating section and configured to rotate from and between a substantially horizontal position to a substantially vertical position, wherein the second seating section cannot rotate more than about 90 degrees from the horizontal position, a first plurality of legs configured to support the first seating section, a second leg configured to support the second seating section, and a back support member extending from a side of the first seating section perpendicular to an axis of rotation of the second seating section.

Abstract: A reinforcement assembly for reinforcing a seat belt apparatus for use with a seat assembly is provided. The seat assembly includes a seat back frame having a pair of downwardly directed side frame members affixed to the vehicle floor. A top frame member traverses the pair of side frame members. A seat cushion frame is pivotally supported on the seat back frame. The reinforcement assembly includes a floor bracket and an elongated vertically aligned reinforcement member. The floor bracket includes a first side which faces the vehicle floor and an opposite second side. The reinforcement member is positioned between the pair of side frame members and includes a first end and an opposite second end. The first end is affixed to the top frame member of the seat back frame. The second end includes a mounting surface which contacts the second side of the floor bracket and in which the mounting surface is affixed to both the floor bracket and the vehicle floor.

Abstract: The present invention discloses a chair, comprising a seat, a backrest and a chair base, wherein the backrest and the chair base are connected through a first connector that comprises a base holder rigidly connected to the chair base, a back holder secured to the backrest, a rotation holder, a first linkage bar, a second linkage bar and a third linkage bar. The present technical solution solves the problem caused in using a traditional chair which is pulling up of a user's clothes when the backrest of the chair is inclined backward. The present design of a linkage movement not only makes a user feel more comfortable, but also is more user-friendly, thereby avoiding the damage of the user's clothes.

Abstract: A sitting device that gives the user an option to sit with a lower portion of the body supported by a half seat, while maintaining a standing posture with the unsupported leg. The sitting device includes two, left and right, half seats and a foot stool. The device also includes a seat support frame and two half-seat-position-adjusting actuators. The frame includes a horizontal crossbar and a vertical guide tube, wherein the back end of each of the two half seats is pivotally secured on the horizontal bar. The vertical guide tube houses a length-changing mechanism to vary the height of the sitting device and a height fixing mechanism which prevents yielding of the height of the sitting device when the user sits. Also comprising are the two half-seat-position-adjusting actuators attached at one end of each to the vertical tube and at the other end to the respective half seat.

Abstract: A pinch guard for a vehicle seat (1) is provided that can be transferred from a normal use position into a step-in position. The vehicle seat (1) includes a rear foot, which is attached to a base (5) in the normal use position of the vehicle seat (1) and in the step-in position of the vehicle seat (1) the rear foot is arranged at a distance above the base (5). The vehicle seat (1) includes a rear lower pivoting axis firmly fixed to the base. The pinch guard includes at least one movable trim (17) with a pivoting axis (A), and the pivoting axis (A) of the movable trim (17) is arranged at a distance from the rear lower pivoting axis, fixed to the base of the vehicle seat (1).

Abstract: Seats that are moveable from a seating orientation, which allows a user to sit on the seat, to a standing orientation, where the seat at least partially supports the user in a standing posture are disclosed. At least a portion of the seat is moveable away from the user's legs when the seat is in the standing position.

Abstract: A seat for a wheelchair is provided. An exemplary embodiment of the seat includes a seat back portion, a bottom portion, and a linkage coupling the bottom portion to the seat back portion such that the seat back portion is movable relative to the bottom portion. The linkage generally includes a first link and a second link. The first link is generally pivotally connected to the bottom portion and the seat back portion. The second link is generally pivotally connected to the bottom portion and the seat back portion. The first link and the second link pivot relative to the seat back portion and the bottom portion as the seat back portion is moved relative to the bottom portion.

Abstract: An adjusting device (10) is provided for a vehicle subassembly to be adjusted. The adjusting device has an adjusting motor which, via an adjusting mechanism, drives a toothed rocker (12) assigned to the vehicle subassembly to be adjusted. The adjusting mechanism structurally reinforces the vehicle subassembly to be adjusted, and an adjusting worm (20) of the structurally reinforcing adjusting mechanism acts directly on the toothed rocker (12).

Abstract: Ergonomic supporting/sitting device useful on all those jobs which are performed while standing, being particularly useful for document sorting jobs and in operating rooms while performing surgery, including a base resting on the floor and a shaft for mounting a seat body such that this ergonomic device includes a base resting on the floor which has a flat back portion and a front portion curved convexly forward and toward both sides in relation to the supporting base surface resting on the floor.

Abstract: A vehicle seat system and method in which a seat belt restraint assembly is secured directly to the seat. The vehicle seat system includes a seat frame and a seat base that supports the seat frame. The system includes a first stop operating at rear portions of the seat base and seat frame to couple the seat base and seat frame and to limit forward pivoting movement of the seat frame upon sudden deceleration. The system may also include a second stop to limit rearward pivoting movement of the seat frame. The coupling of the seat base and seat frame provides the seat system with sufficient strength to satisfy load testing requirements and to provide comfort to the occupant. The vehicle system may include a tilt adjustment mechanism that allows tilting of the seat frame and that may also form part of a cushion slide mechanism.

Abstract: Vehicle seat including a link for raising and lowering the seat and a tilt pan disposed forwardly of seat cushion frame of the seat. Rotatably provided to the seat cushion frame is an actuator link having: one end portion pivoted to the tilt pan; and another end portion formed with sector gear portion and arcuate hole. A pin for supporting a gear case having a pinion meshed with the sector gear portion is fixed to the seat cushion frame. Such pin is used with both of the link and actuator link, in common. Namely, an upper end portion of the link and the afore-said another end portion of actuator link are collectively disposed at that pin so as to overlap each other, and the upper end portion of link is pivotally connected to the pin, whereas the pin passes through the arcuate hole of actuator link.

Abstract: A fold and tumble seat assembly includes a seat cushion having an underside that forms a floor surface when the seat cushion is rotated to a stowed position, and a seat flap attached to the underside of the seat cushion for bridging a gap formed between the seat cushion and an adjacent vehicle floor surface when the seat cushion is in the stowed position. The flap includes a protruding tip adjacent a distal end thereof for facilitating sliding movement of the distal end along the adjacent vehicle floor surface when the seat cushion is rotated.

Abstract: An adjuster mechanism (14) includes a tilt bracket (52), a sector (54), and a motor and transmission assembly (56) and has minimal mass. The adjuster mechanism (14) is useful hi providing adjustability to a vehicle seat (12) for adjusting the front portion of a seat base cushion (16) between a plurality of positions.

Abstract: A fold and tumble vehicle seat assembly includes a seat cushion having an underside that forms a floor surface when the seat cushion is rotated to a stowed position, and a seat flap attached to the seat cushion for bridging a gap formed between the seat cushion and an adjacent vehicle floor surface when the seat cushion is in the stowed position. The seat flap has an outer sleeve formed of a first material and an insert received in the sleeve formed of a second material.

Abstract: Seats that are moveable from a seating orientation, which allows a user to sit on the seat, to a standing orientation, where the seat at least partially supports the user in a standing posture are disclosed. At least a portion of the seat is moveable away from the user's legs when the seat is in the standing position.

Abstract: The device is embodied in four variants. The home chair comprises a three-dimensional frame with a seat pivotally connected thereto in such a way that it is tiltable forward and up-and-down, a seat arresting device, a smooth displacement compensator, a reset mechanism embodied in the form of an oil-gas damper and a backrest, the tilt angle with respect to the seat is less than 90° and the distance between the top edge and the seat is less than 250 mm. The school variant is provided with a smooth displacement compensator and a reset mechanism embodied in the form of a spring. The child variant is adjustable in the vertical and horizontal planes, thereby making it possible to select the optimal sitting parameters of a child during the growth thereof, and comprises a seat provided with a tilt angle adjusting unit, a smooth displacement compensator and a reset mechanism.

Abstract: Apparatus for a perineal wash system includes a seat with a pair of pads spaced apart front to back to define a gap. The pads and frame define front and rear access areas dimensioned to allow a caregiver to access the perineal area of a seated person. In various embodiments at least one pad is movable sideways and may include a biasing spring, an operating handle, and/or a latch. The seat is suitable for a shower chair, a wall-mounted chair, and a bathtub chair. A gas spring optionally lifts one end of the seat. In one embodiment a perineal washer is supported adjacent the seat. The washer receives a nozzle of a sprayer and redirects the spray through a movable conduit to direct liquid upward to the perineum. In one embodiment a commode pot below the seat has a gap sufficient to avoid pinching dangling body parts.

Abstract: An adjustable seat ramp adapted for use with a seat base and defining a first angle of inclination, includes a structure translatably disposed within or integrally formed with the base and presenting a first position, and further includes an actuator employing a shape memory material element and configured to cause the structure to translate to a second position, wherein a second angle of inclination is defined.

Abstract: A sit down and stand up walker for assisting a user during walking and when not walking in a standing, partially standing or sitting positions with partial or full weight bearing support and with means to change from standing, partially standing to sitting positions with partial weight bearing support to a fixed elevation with full weight bearing support in any varied or repeated sequence. The partial or full weight bearing means supports a seat assembly which includes a seat and front body support with adjustable positioning to provide pelvic stability. The angle of the seat assembly relative to a flat ground surface is maintained at any elevation of the seat assembly between a standing and sitting position. The weight bearing means is responsive to the variable force supplied by the user as the user walks, stands or sits allowing the seat assembly to move up or down.

Abstract: A raiser seat for assisting a person from a sitting to a standing position is described. The seat comprises: a seat frame (4); a seat (10) supported for movement relative to the seat frame between a lowered position and a raised position; and a movement mechanism for moving the seat between the lowered and the raised positions. The movement mechanism comprises at least one cam (104) and the seat rests on the at least one cam such that rotation of the at least one cam results in movement of the seat relative to the seat frame.

Abstract: An article of furniture includes a base, a seat frame supported by the base, and a back frame attached to the seat frame. The back frame includes an upper portion and a lower portion. The upper portion is connected to the lower portion by at least one first elastomeric member such that the upper portion is moveable relative to the lower portion. The upper portion is moveable from an upright position to at least one reclined position. In some embodiments of the article of furniture, the at least one first elastomeric member is a strap composed of a polymeric material, such as, for example, a thermoplastic polyester elastomer or a polymeric material containing at least one elastomer. In some embodiments, the article of furniture may be designed as a chair, a lounge chair, or an office chair.

Abstract: An office chair has a seating element with an upright tubular element (3) and a base, the seating element being connected to the base by means of the support element (1) so as to be swiveled and reset. Rubber buffers (19, 24) are provided between a connecting element (2) of the base, ring discs (11) and (17) and a tubular element (8) extending from the seating element downward and allow an oscillating movement of the seating element. The rubber buffers at least partially enclose the connecting element (2), thereby retaining the same. A pneumatic spring (4) allows to adjust the height of the seat. A thumb screw (16) allows to adjust the restoring force by compressing the rubber buffers (19, 24) to a greater or lesser extent.

Abstract: According to the present invention there is provided a module for use with a chair having a seat portion supported by a support portion, for triggering movement of a person sitting thereon. The module is adapted for attachment to the chair between the seat portion and the support portion, and comprises a driving motor, a base platform adapted for fixed attachment to the seat portion, and an angled axis system (AAS). The AAS has a main rotary element having a main axis, and an auxiliary rotary element having an auxiliary axis and coupled with the first rotary element so that the auxiliary axis is oriented at an angle to the main axis. The module is designed such that when the main rotary element rotates about its main axis, the auxiliary rotary element also rotates about the main axis.

Abstract: An inclination adjusting assembly for a seat of a chair includes a disk; two coupling blocks limited at a bottom of the disk; the two coupling blocks having threaded holes, respectively to be threaded to an adjusting threaded rod so that by threadedly moving the coupling blocks, one of the coupling block fixed to a retaining sheet of the disk; an upper end of each coupling block being formed with an inclined surface; a pad being movable along the two inclined surfaces; a control rod connected to the pad; a first end of the control rod being engaged to the pad; a second end of the control rod being connected to an engaging tube; the tube having a polygonal through hole; and a polygonal post combined to the disk; a section of the polygonal post penetrating through and tightly engaging with the through hole of the tube.

Abstract: This application provides a mechanism that consists of right and left mounting bases that in different embodiments are adapted for mounting on a variety of different chairs. These mechanisms have roller tracks that have been designed on a radius with the fulcrum or pivot point positioned very close to where the center of mass is located, for a wide spectrum of different sized people from children through over-sized adults, to achieve varying degrees of movement. On the inside of the left and right mounting bases are curved slots that are parallel to the curvature of the roller tracks where guide members on the front and rear mounting brackets keep the seat and back rest from coming off the chair. There are front and rear rollers that traverse within the roller tracks that pivot on axles in the front and rear mounting brackets. In the curved slots on the sides are adjustable stop pins that limit the tilt or travel of the seat and back rest.

Abstract: A chair having an adjustable seat pan is disclosed. The chair includes a seat frame having a front end and a rear end, a seat back attached to the rear end of the seat frame, a seat pan pivotally connected to the seat frame, and a seat drop down link having a first end attached to the seat frame and a second end in contact with a catch member located beneath the seat pan so that the seat pan can be raised and lowered from a flat position to approximately a 6° angle with respect to the seat frame.

Abstract: A stool includes a body having a seat and a wheel assembly. The seat is selectively rotatable about an axis of the stool. The wheel assembly is engaged to the seat. The wheel assembly includes a plurality of wheels. Each of the wheels includes an exterior surface having a first portion and a second portion. The second portion includes a contoured surface. The body is adapted to tilt onto the second portions of the wheels.

Abstract: The disclosure relates to a chair comprising a seat part, at least one leg part, at least one foot part that consists of a predetermined plurality of foot elements and at least one spring assembly. According to the disclosure, at least one designated foot element and/or a sub-section of said element is configured to be mobile and is subject to a restoring moment under the action of a load.

Abstract: Provided is a configuration for imparting at least partial body support to a user in multiple positions. The seating apparatus has a support structure holding a body supporting assembly that includes one member defining a seating surface and another member that can be configured to form an auxiliary body support surface essentially parallel to and at a different level than the seating surface. The different level can include at least one level that is below that of the seating surface.

Abstract: A system for adjusting the relative position between two furniture parts includes a first part provided on one side with at least two parallel guide surfaces at a prefixed distance X apart, a second part facing the first part, an eccentric multi-lobe cam, the continuous profile of which is composed of tangential curves disposed such as to form an odd number n of pairs of opposing arcs, each pair of arcs having the same center of curvature with the sum of the radii of curvature being equal to X, the cam being housed between said two parallel guides and being pivoted to said second part on the eccentric pin, and means for rotating the multi-lobe cam.

Abstract: A chair device, wherein the chair has a base, an upright, length-adjustable supporting column which at the bottom is connected to the base, and a seat device which is tiltably or non-tiltably connected to an upper region of the supporting column. A lower, elastically resilient coupling forms a tiltable connection between the base and a lower portion of the supporting column. The lower coupling is designed to permit tilting of the supporting column relative to the base in any one of 360° of tilting direction or only in one tilting direction.

Abstract: A dual front linkage system for a adjusting a vehicle seat includes a seat sub-frame member, a first linkage member, a second linkage member, and a base member. The first end of the seat sub-frame member is coupled to the second end of the first linkage member and the second end of the seat sub-frame member is coupled to the seat base, the first end of the first linkage member is coupled to the first end of the second linkage member, the second end of the second linkage member is coupled to the first end of the base member, and the second end of the base member is coupled to the vehicle. The linkage system enables the seat base and seat back to be folded forward and downward into a stowed position and allows the seat to be tumbled forward to enhance vehicle ingress and egress.

Abstract: A vehicle seat includes a seat part having a seat substructure. The seat part is displaceable along a transverse axis with respect to the seat substructure and the seat part is at least partially swivelably about the transverse axis. The seat includes a displacement element having a displacement length, a fixed lower part and an upper part. A first longitudinal movement of the seat part and a first transverse movement of the seat part occurs along a first section of the adjustment length. A second longitudinal movement of the seat part and a second transverse movement of the seat part occurs along a second section of the adjustment length. The ratio of the first longitudinal movement to the first transverse movement differs from the ratio of the second longitudinal movement to the second transverse movement.

Abstract: A chair having an adjustable seat pan that can be moved from an angled to a flat position is disclosed. The chair includes a seat frame having a front end and a rear end with a seat back attached to the rear end of the seat frame. A seat articulator that includes a ramp bar that has a first end connected to the seat back and an upper edge with a second end displaced downward from the upper edge is adjacent to the seat frame. The seat pan is pivotally connected to the seat frame and a drop down link is pivotally attached to the seat pan. A cam roller is attached to the drop down link where it is positioned on the upper edge of the ramp bar in contact with the seat pan.

Abstract: A chair having an adjustable seat pan is disclosed. The chair includes a seat frame having a front end and a rear end, a seat back attached to the rear end of the seat frame, a seat pan pivotally connected to the seat frame, and a seat drop down link having a first end attached to the seat frame and a second end in contact with a catch member located beneath the seat pan so that the seat pan can be raised and lowered from a flat position to approximately a 6° angle with respect to the seat frame.

Abstract: Seating mechanisms enable the user to vary the seating angle of a chair or stool by enabling at least the portion of the chair that supports the thighs to be tilted forwardly to controllably increase the seating angle while maintaining the spine and pelvic region in vertical alignment. The extent of forward tilt is controlled by pressure applied by the user's thighs that also serves to counterbalance the weight of the user's torso.

Abstract: An adjustment mechanism and an inclination-adjustable seat are provided. The inclination-adjustable seat comprises a connecting base, a seat frame, at least one adjustment mechanism and a supporting base, wherein the seat frame is connected to the connecting base, the adjustment mechanism is adapted to adjust the inclination of the inclination-adjustable seat and is connected to the seat frame and the connecting base, and the supporting base is connected to the connecting base for supporting the connecting base.

Abstract: The invention relates to a delordosation device for users of a rehabilitation appliance, in particular for the verticalization of a sit/stand exercise machine or a wheel chair with a seating area and support aids for a user, the seating area supported in a swiveling manner swiveling for verticalization. To avoid hyperlordosis while patients with a restricted mobility are being straightened up in rehabilitation measures or a verticalization in a sit/stand exercise machine 1 or wheel chair, it is provided that the seating area is supported in a swiveling manner, and at least a portion of the seating area is mounted in a movable manner. Thus, a pelvis rotation can be initiated during verticalization, whereby hyperlordosis is avoided.

Abstract: A seat is disclosed for use in a vehicle. The seat includes a pivotable seat cushion, a pivotable seatback, and a pivotable headrest. A rearward portion of the seat cushion is pivotably attached to the floor of the vehicle by an anchor member. A forward portion of the seat cushion is pivotably coupled to a forward support leg that contacts the floor of the vehicle when the seat cushion is retained in a generally horizontal position. The forward support leg automatically retracts to a position proximate the seat cushion when the seat cushion is released and pivoted upwardly to a generally vertical stowed position proximate the seatback. The seatback is pivotably attached to the anchor member and may be downwardly pivoted to a generally horizontal stowed position proximate the seat cushion. The headrest may be pivotally attached to the seatback, and may be movable to a stowed position.

Abstract: A connecting structure comprises a tubular connection joint and a tubular pipe-shaped cardboard tube for integral engagement with the tubular connection joint. The tubular connection joint is generally curved-shaped and has an insertion portion and a lock projection disposed along a curved inner surface of the insertion portion. The pipe-shaped cardboard tube has an oblique front end portion configured to be inserted into the tubular connection joint so that the oblique front end portion engages between the lock projection and the curved inner surface of the insertion portion.

Abstract: The invention relates to improvements in the object of patent P200603269 for “Automatic rotation system for tilting seats of chairs or armchairs”, comprising rotation supports formed by two parts (1 and 2) which are rotating in relation to one another, between which there is incorporated a rotating draw-spring (4), one of the parts (2) of each rotating support determining an annular channel (5), in which there is housed a ring (6) together with a high-viscosity silicone filler, such that said ring (6) is linked by pulling with the other part (1) of the rotating support, a braking action occurring on the rotation movement between the two parts (1 and 2) due to the friction of that ring (6) with the silicone in the channel (5).

Abstract: A chair is provided comprising a seat assembly including a seat back and a seat bottom and a support frame including a left leg assembly and right leg assembly connected by a transverse support member. The seat back is pivotably connected to each of the leg assemblies such that an upper portion of the seat back pivots in relation to the leg assemblies between a first seat back position and a second seat back position. The seat bottom is rotatable in relation to the seat back between an upright position and a horizontal position. The seat bottom is slidingly engaged with the leg assemblies such that pivoting of the seat backward from the first seat back position to the second seat back position causes the seat bottom to slide forward from a first seat bottom position to a second seat bottom position.

Abstract: A seat is disclosed herein. The seat includes a seat cushion frame assembly. The seat also includes a seat cushion mounted on the seat cushion frame assembly for pivoting movement about a cushion pivoting axis. The seat also includes a cushion lock operably disposed to selectively lock the seat cushion frame assembly and the seat cushion relative to one another and thereby prevent the pivoting movement. The cushion lock defines a plurality of locked positions such that the seat cushion is positionable in a plurality of different orientations relative to the seat cushion frame assembly.

Abstract: An ergonomic musician's stool or chair, comprising of a sitting surface at the top, which is supported by a support frame or structure with a number of legs attached. One or more of said legs having the ability to telescope to be able to be of a different length than at least one, and possibly more, of the other said legs. The ability to adjust the length of one or more of said legs gives a user the ability to affect the pitch, or lack thereof, of said sitting surface. This allows the user to affect the position and tilt of their pelvic region, the outcome being an overall benefit to the user's posture. An ergonomic attachment for a musician's stool or seat comprising a receiving piece capable of securely connecting to the stool or seat's supporting frame or leg, a telescoping foot or leg piece, a locking mechanism allowing said telescoping foot or leg piece to be locked or held into a desired position or length, and a self-leveling foot-base.

Abstract: A vehicle seat is provided, in particular a commercial vehicle seat, having a scissor-type stand (3) that can vibrate and comprises a bottom frame (5), a top frame (7), two first rocker arms (8a) and two second rocker arms (8b) that intersect in pairs at a scissor axis (10) extending in a transverse seat direction (y). At least one first rocker arm (8a) is supported at one end by at least one bearing mechanism (20) on the top frame (7) or on the bottom frame (5) so as to be able to rotate and vibrate in the longitudinal seat direction (x). The at least one bearing mechanism (20) has at least one damping spring (26), which elastically absorbs and dampens vibrations in the longitudinal seat direction (x).