Abstract: A vehicle seat comprising a seat back with a seat back frame, a seat cushion with a seat cushion frame and one first and second links. The first link is mounted pivoting relative to the seat cushion frame around a first transverse axis, and relative to a seat support around a second transverse axis. The second link is mounted pivoting relative to the seat cushion frame around a third transverse axis, and relative to a seat support around a fourth transverse axis. The first and second links are configured in order to allow lifting a rear part of the seat cushion frame relative to said seat support.

Abstract: An adjusting device for a vehicle seat may have a first adjustable assembly, a second adjustable assembly, and an electric motor. The electric motor may be operatively connected both to an adjustment gearing of the first adjustable assembly as well as to an adjustment gearing of the second adjustable assembly by at least one output shaft. A motor support may be provided which receives the electric motor, and the motor support may be secured to the two adjustable assemblies via a respective adapter. The motor support may have a metal material as a single piece. The adapters may be made of a non-metal material. A method for assembling the adjusting device may include first securing the adapters to the respective paired adjustable assembly. The motor support may be connected to the adapters in an additional step.

Abstract: A vehicle slouch seat having a carriage that includes a front side and a rear side. A link element is located on a rear side of the carriage and a slideable element is located on the front side of the carriage. A cushion is movable in an upward direction with the carriage connected to a base structure at one of a plurality of latch points. The cushion is prevented being rotated in the upward direction via a cushion rotational prevention structure with the carriage connected to the base structure at another one of the plurality of latch points.

Abstract: A seat assembly is provided that may include a seatback and a seat bottom. The seatback may extend generally upright. The seat bottom may be connected to the seatback and may include a frame and a seat bottom adjustment mechanism. The seat bottom adjustment mechanism may include first and second cushion pans that are movable relative to the frame and movable relative to each other between first and second configurations. The first and second cushion pans may support one or more seat cushions.

Abstract: A folding and reclining seat that can be folded against the back wall of the interior of an extended cab or super cab pick up vehicle is disclosed. The seat may be folded flush into the back wall thereby maximizing usable interior cargo space when not in use. The angle of the back seat can be adjusted by selective fore-and-aft movement of the seat cushion.

Abstract: The invention relates to a vehicle seat which may be adjusted forward and back along a seat rail arranged on both sides, and in which both the inclination of a seat surface and a back surface and a height thereof may be adjusted. Such a vehicle seat is intended to be adapted very easily and in an uncomplicated manner to the different body sizes of drivers. This is achieved in that a common adjustment mechanism is provided for all seat adjustment sequences, which coordinates the individual adjustment sequences, in that the coordination of the adjustment sequences produces seat adjustments in which the seating position of the respective driver is optimized irrespective of body size.

Abstract: The present document describes a link member for providing an interface between an actuator and a seat base. The link member has a translational degree of freedom and at least two rotational degrees of freedom. The link member comprises: a joint member having a spherical surface, the joint member for attachment to one of the actuator and the seat base; a housing for attachment to the other one of the actuator and the seat base; and a slider mounted on the spherical surface and within the housing. The slider is free to move in a direction of a translational plane within the housing thereby providing the translational degree of freedom. Furthermore, the slider is free to slide on the spherical surface and to pivot about a first axis and a second axis thereby providing the at least two rotational degrees of freedom.

Abstract: In a vehicle seat having a seat back and a seat cushion that are placed in one of a normal position and a reclining position that is more reclined than the normal position, a link mechanism is operable to change the positions of the seat back and the seat cushion by moving the seat back and the seat cushion in relation to each other, so that a back contact point of the seat back, where a predetermined portion of the back of the seated person contacts the seat back, contacts the predetermined portion of the back of the seated person in both the normal position and the reclining position, and so that an ischial contact point of the seat cushion, where a tuber-of-ischium of the seated person contacts the seat cushion, contacts the tuber-of-ischium of the seated person in both the normal position and the reclining position.

Abstract: In a vehicle seat (1), in particular a motor vehicle seat, vehicle seat, in particular motor vehicle seat, which may be transferred from at least one position of use suitable for conveying passengers into at least one pivoted-forward position of non-use, comprising a base (9), at least one rocker (13) which is linked at least indirectly to the base (9), in particular to a front foot (11) attached to the base (9), a seat cushion (3) which is linked to the rocker (13), at least one link (27, 29) which is linked at least indirectly to the base (9), in particular to the front foot (11) attached to the base (9), at least one rear foot (21) which is linked to the link (27, 29) and is releasably locked to the base (9), and a backrest (5) which is pivotably linked to the rear foot (21) about a backrest pivot axis (33), the seat cushion (3) is linked by means of an articulated joint (35) directly to the backrest (5).

Abstract: An adjustable passenger seat having a seat recline mechanism and including a seat base having first and second non-intersecting seat path guide slots for guiding the travel of a translation guide assembly interconnected to a linear translating seat pan drive rail through the seat pan such that translational movement of the drive rail with respect to the seat base causes movement of the seat pan and the seat back between upright and flat seating positions.

Abstract: An improved mechanism for a movable seat for use on a bi-directional work vehicle that laterally shifts the lower seating surface as it is pivoted between raised and lowered positions to increase clearance adjacent to the seat to improve operator ingress and egress to the vehicle operator platform. The incorporation of a biasing mechanism enables the seat mechanism to automatically reposition the seat for maximum ingress/egress clearance when the vehicle operator rises from the seat.

Abstract: A wheelchair having a tiltable and translatable seat for compensating for shifting of the center of gravity of an occupant during tilting is provided. Such a wheelchair includes a frame, a first actuator, a seat assembly, and a first rigid link. The first actuator includes opposing front and rear ends coupled to the frame, a rod that extends between the front and rear ends, and a connector that is capable of translating in response to actuation of the rod. The seat assembly is directly coupled to the connector of the first actuator. The first rigid link has a front end and a rear end. The link front end is pivotably coupled to the frame, and the link rear end is pivotably coupled to the seat assembly. The link may be oriented such that as the connector translates, the first link impels the chair to tilt.

Abstract: A stowable seat 10 for a motor vehicle 1, and in particular for a van, having a moveable bulkhead 9 is disclosed in which a backrest 11 of the seat 10 is stowed vertically above a base 12 of the seat 10 and a support mechanism 20 for the seat 10 is arranged so that no member of the support mechanism 20 is located to the rear of a vertical plane “V” aligned with a rearmost part of the stowed seat 10. This arrangement allows the moveable bulkhead 9 to be moved up to the rearmost edge of the stowed seat 10 thereby maximizing the carrying capacity of the motor vehicle 1 when the seat 10 is stowed. The support mechanisms 20 allow the seat 10 to be moved between its stowed and ‘in-use’ positions simply by moving the backrest 11.

Abstract: The invention relates to a seat for a vehicle, in particular for all-terrain vehicles, with at least one seat area extending in the longitudinal direction (X) of the vehicle and in the width-wise direction (Y) of the vehicle for receiving a person, a backrest for supporting the back of the person and a holding device connected in the vertical direction (Z) under the seat area and to the latter for keeping the seat area at a distance from a coupling region for coupling the seat to the vehicle, wherein the holding device has at least one spring device for the movable arrangement at least for a time of at least the seat area with respect to the coupling region in the longitudinal direction (X) of the vehicle and/or in the width-wise direction (Y) of the vehicle.

Abstract: A wheelchair having a tiltable and translatable seat for compensating for shifting of the center of gravity of an occupant during tilting is provided. Such a wheelchair includes a frame, a first actuator, a seat assembly, and a first rigid link. The first actuator includes opposing front and rear ends coupled to the frame, a rod that extends between the front and rear ends, and a connector that is capable of translating in response to actuation of the rod. The seat assembly is directly coupled to the connector of the first actuator. The first rigid link has a front end and a rear end. The link front end is pivotably coupled to the frame, and the link rear end is pivotably coupled to the seat assembly. The link may be oriented such that as the connector translates, the first link impels the chair to tilt.

Abstract: The present invention is related to one massage chair with slant angle adjustable chair frame, primarily comprising one basic frame, one chair frame, two first connecting members, two second connecting members and one linearly retractable actuator. The basic frame comprises one base frame and two support frames arranged in parallel and stretching up from said base frame. Every support frame has one first pivot portion and one second pivot portion. The chair frame has at least one set of massage chair, comprising one seat frame with two side frames. Every said side frame has one third pivot portion and one fourth pivot portion. Every first connecting member has one top end and one bottom end. The top end is pivotally connected to the first pivot portion of the corresponding support frame. The bottom end is pivotally connected to the third pivot portion of one corresponding side frame. Every second connecting member has one top end and one bottom end.

Abstract: A floor structure of a driver's seat for an automotive vehicle comprises an organ type of accelerator pedal supported swingably at a support point with its lower-end hinge portion, a hanging type of brake pedal provided beside the accelerator pedal and supported swingably at a support point with its upper pivotal portion, a floor mat covering an upper face of a front portion of a floor panel located in front of the driver's seat, and an incline forming member provided at a specified portion of the floor mat located in back of a pressing-face board of the accelerator pedal, the incline forming member forming an incline portion at an upper face of a heel placing area on which a driver's heel is placed, the incline portion being inclined so that its front portion is positioned at a higher level than its rear portion.

Abstract: In a vehicle seat (1), in particular a motor vehicle seat, vehicle seat, in particular motor vehicle seat, which may be transferred from at least one position of use suitable for conveying passengers into at least one pivoted-forward position of non-use, comprising a base (9), at least one rocker (13) which is linked at least indirectly to the base (9), in particular to a front foot (11) attached to the base (9), a seat cushion (3) which is linked to the rocker (13), at least one link (27, 29) which is linked at least indirectly to the base (9), in particular to the front foot (11) attached to the base (9), at least one rear foot (21) which is linked to the link (27, 29) and is releasably locked to the base (9), and a backrest (5) which is pivotably linked to the rear foot (21) about a backrest pivot axis (33), the seat cushion (3) is linked by means of an articulated joint (35) directly to the backrest (5).

Abstract: Disclosed herein is an exercise chair for aiding in the alleviation of lower back pain. The chair device of the present invention comprises a central post portion defining a central axis with a base at one end and a coupling portion fashioned to be tilted relative to the central axis at the other end. A coil spring is concentrically located on the central axis and affixed to the post portion at the one end and to the coupling portion at the other end. The coil spring is normally biased to maintain the seat of the chair in a non-tilted position. Also disclosed herein, is a method of practice employing the chair device. In the method, a user in a seated position on the chair selectively and reversibly rotates their pelvic/hip region in three possible dimensions about a point of origin substantially centrally located to their pelvic region in various directions resulting in stretching and strengthening exercises of the abdominal, lumbar and pelvic/hip regions of the user.

Abstract: A synchronous office chair comprising a support (1) firmly connected with a supporting column, a seat base (2) articulated on a tilting axis (4) support with a flange (5) and a backrest (3) with a back bracket (6). The back bracket (6) features a first, second and third cam tracks (7, 8, and 9) and engages in an interstice between support (1) and seat base (2). Said seat base (2) with flange (5) and backrest (3) with back bracket (6) are formed to execute a synchronous movement. A first roller bearing (10) is mounted on flange (5) of seat base (2) that engages in the first cam track (7) of back bracket (6) and in which the synchronous movement is guided in first cam track (7). A second roller bearing 11 is mounted on seat base (2) that engages in second cam track (8) of back bracket (6) and in which synchronous movement is guided in second cam track (8).

Abstract: A curved tracking platform that can be employed on a dynamic seat or divan such as those used in a business jet aircraft so that the seat can be comfortably used as a seat or in an extended bed position. When in the unextended seat position, the tracking platform allows the horizontal portion of the seat to support an occupant pitched back toward the vertical seat cushion at or about an angle of 6° to the horizontal. However, when the tracking platform is extended so that the seat can be used as a bed, the tracking platform travels along a curved frame rail profile which allows the platform to lay flat or substantially flat, thus allowing the vertical cushion to be placed next to the horizontal seat cushion so that they lie substantially flat to provide optimized comfort.

Abstract: The present invention is directed to a vehicle seat suspension apparatus that is mechanically simple, inexpensive, occupies little space, and operates effectively with force inputs from any horizontal direction. The invention comprises a base, an isolator, and a plurality of links connected to both the base and isolator so that the isolator is suspended from the base and can move or swing horizontally in all directions relative to the base. The isolator has an upper plate with two flanges that depend from the plate. The base is positioned directly below the upper plate and between the two flanges. The links are connected to the base and the flanges of the isolator by means of ball and socket connectors that permit the isolator to move in all horizontal directions relative to the base. A travel limit system is used to permit adjustment in the travel of the isolator relative to the base.

Abstract: A vehicle slouch seat includes a cushion frame attached to a seat back frame such that the cushion frame is pivotable from an upright position to a slouch position. The slouch seat is also foldable and stowable against a vehicle cabin wall. Motion between the upright and the slouch positions is mediated by a guide hook attached to the back side of seat back frame.

Abstract: A booster seat for children and infants and more particularly an improved feeding seat with telescoping and retractable arms extending from a base supporting a removable tray to facilitate feeding of a child. The feeding seat is reclinable and also foldable into a compact transportable unit separately from the removable tray for efficient use and compact storage and transport.

Abstract: A seat includes at least one inclinably adjustable seat component, such as a seat section (12), whose seat frame structure can be disposed on a floor structure (24) in such a way that the seating section is pivotable around its stationary legs (22). The pairs of stationary legs (22) in the region of the front edge (26) and the rear edge (28) of the seating section (12) act upon the seating section. An actuating device (30) adjusts the respective inclination of the seat section (12), and has an exit position, whereby the seat section (12) is orientated in an essentially parallel manner in relation to the floor structure (24) and cannot be inclined. The actuating device (30) extends in the exit position between the stationary legs (22), whereby one end (32) in the region of the front seat (26) is orientated counter to the floor structure (24) and the other end (34) in the region of the rear edge of the seat (28) is orientated in the direction of the seat frame structure (20).

Abstract: A vehicle seating system for adjusting, without rails, the vertical and longitudinal position and the inclination of a vehicle seat relative to a vehicle floor has, in one embodiment, first and second pivot levers, spaced apart from one another in an adjustment direction. The pivot levers are articulated respectively on the vehicle seat and on the vehicle floor by way of pivot pins extending parallel to one another. The pivot pins arranged on the vehicle seat and on the vehicle floor of at least one of the pivot levers are lockable independently of one another.

Abstract: A seat, preferably an aeroplane seat, includes a seat base (12) which can be positioned on the floor and seat components which are provided for each seat and are arranged on the seat base (12). The seat components can be a seat back (1) and a seating element (2) with a front region (3) and a rear region (4). The rear region is located at the point where the seating element joins the seat back (1). The seat back can be displaced from an upright position to an inclined position and vice versa, simultaneously adjusting the inclination of the seating element (2). The front region (3) of the seating element (2) essentially maintains its height above the floor. The rear region (4) sinks as the seat back (1) increasingly inclines. The seat back (1) has at least one first part (5) and one second part (6) which at least partially support each other with the adjacent surfaces and which can be displaced in relation to each other during the adjustment of the inclination of the seat back (1).

Abstract: A vehicle seat suspension apparatus that is mechanically simple, inexpensive, occupies little space, and operates effectively with force inputs from any horizontal direction. The preferred embodiment includes a base, an isolator, and a plurality of links connected to both the base and isolator so that the isolator is suspended from the base and can move or swing horizontally in all directions relative to the base. The isolator has an upper plate with two flanges that depend from the plate. The base is positioned directly below the upper plate and between the two flanges. The links are connected to the base and the flanges of the isolator by means of ball and socket connectors that permit the isolator to move in all horizontal directions relative to the base.

Abstract: A child safety seat pivots between a sitting and reclining position on a base secured by a vehicle safety belt. A pair of pivot arms extending from each side of the safety seat slide in a pair of grooves in each side of the base. The primary pivot arm moves in an essentially horizontal groove to maintain a low center of gravity. A secondary pivot arm stabilizes the safety seat and helps to maintain the safety seat back in close proximity with the vehicle seat back. A high pivot arm near the top of each side of the seat may be positioned in a mating opening or a slotted opening in each side of the base. A motor and reversible drive assembly, which may be remotely controlled can be used to move the safety seat.

Abstract: The chair comprises, for its support on the floor, a structure (16, 12) carrying a seat and a back-rest. The chair is provided with a mechanism (10) which enables the seat to be advanced relative to the back-rest, within a predetermined range.

Abstract: A reclining passenger seat, including a seat frame for being attached to a supporting deck, a seat bottom carried by the seat frame, and a seat back carried by the seat frame and moveable with the seat bottom from and between the upright and sleep positions. A legrest assembly is mounted adjacent a forward end of the seat bottom for being selectively extended generally downwardly and outwardly from the seat bottom for supporting the legs of the passenger. An armrest assembly is carried by the seat frame and includes an armrest moveable between a horizontal position with an upper support surface supporting a forearm of the seat occupant in the upright seat position and a forwardly-inclined, lowered position wherein the upper support surface is aligned with an upper surface of the seat bottom for providing a wider sleeping surface for the seat occupant when the seat is in the fully-reclined sleep position.

Abstract: A seat hinge assembly includes a lower support pivotally supporting an intermediate support and an upper support pivotally supported by the intermediate support. The intermediate support is selectively locked in one of two positions via a lower cam and lock pin. A pawl is pivotally supported by the intermediate support and includes a tooth portion for selective engagement with a tooth portion of the upper support. A spindle is rotatably supported by the intermediate support and is in operative communication with an upper cam. Rotation of the spindle in a first direction disengages the upper cam from the pawl, thus disengaging the teeth portions for enabling forward rotation of the upper support relative to the lower support. Subsequently, the spindle is rotatable in a second direction for disengaging the lower cam and lock pin arrangement for enabling rotation of the intermediate support relative to the lower support.

Abstract: A reclining chair is formed of a base frame, a seat frame, and a backrest frame. The base frame is provided with two horizontal slide rails and two inclined slide rails. The seat frame is provided with two first slide wheels slidable on the horizontal slide rails, and two second slide wheels slidable on the inclined slide rails. The backrest frame is fastened at one end to the seat frame such that the backrest frame reclines along with the seat frame.

Abstract: A lift and tilt chair including both motorized lift capability and motorized tilting capability A hydraulic lift cylinder is provided and operates in conjunction with a motorized tilting system. A seat support is provided having rollers affixed thereto for providing the tilting motion and having the lift cylinder attached thereto for allowing raising and lowering of a patient seated within the chair.

Abstract: A wheelchair has a constant center of gravity tilt assembly which can be connected to any type of frame structure. A chair is pivotally attached to the tilt assembly which includes a slidable guide member. The guide member is slidably attached to a guide rail which can be mounted on the frame. An actuator for moving the chair forward and backward is operatively connected at one end to the slidable guide member and at the other end to the wheelchair frame. A link arm has one end operatively connected to said frame and the other end pivotally connected to the seat of the integral chair. Upon actuation of the actuator, said guide member moves said chair forward or backwards and as a consequence thereof, said seat is tilted backward or forward by said link arm to substantially maintain the center of gravity of a person seated in the chair.

Abstract: A self-levelling apparatus for a seat comprises a base (21, 22, 27), a seat levelling assembly (2, 18, 19, 41) displaceably connected with the base, and a reversible electrical motor (40) disposed between the seat and the base for rotation of the seat levelling assembly around an axis about parallel with the base. The seat levelling assembly is disposed between the base and the axis. Themotor shaft (42) extends parallel with the axis and engages with a flexible actuation means, such as a roller chain, fixed at its one end at the base. The apparatus also comprises a positional detection means for control of the motor. The apparatus further comprises arcuate co-operating seat and base bearing elements (2; 22) of which at least one has a surface defined by rotation of a straight, curved or irregular line around the axis, such as a cylinder or cone segment surface.

Abstract: An office chair with a pedestal (14) and, attached thereto, a seat carrier (13) that carries a seat element (10) and that can be shifted with relation to the pedestal (14) out of an initial position (a) against the restoring spring force along a guide track that when the chair is inclined rearwardly relative to the vertical direction. To improve sitting comfort, the increase in the restoring spring force along the shifting path in a first shifting path segment adjoining the initial position is greater than in a second shifting path segment that is spaced away from the initial position (FIG. 2).

Abstract: A tilt system for tilting a power wheelchair seat comprises a seat frame having laterally extending front and rear cross tubes and side tubes. A rear cross plate extends laterally between the wheelchair side frames and is slidably engageable with the side frames. A pivotal connection is provided between the rear seat cross tube and the rear cross plate. A front actuator cross tube is supported at a front end of the wheelchair base. A linear actuator is supported between the rear cross plate and the front actuator cross tube. A tilt linkage is disposed along opposite sides of the seat frame. Each tilt linkage has a front end pivotally connected to the wheelchair base and a rear end pivotally connected one of the side tubes of the seat frame. Another embodiment of the invention includes a glide system is secured to the inner surfaces of the wheelchair side frames. Another embodiment of the invention includes a wheelchair having a base comprises of two side frames.

Abstract: The chair for handicapped individuals has an undercarriage with a descending and ascending track system, and a tiltable assembly equipped with track followers for riding the descending and ascending track system of the undercarriage. A brake shiftable between a locked condition for holding the tiltable assembly against movement on the track system and an unlocked condition for allowing movement of it on the track system is provided. The tiltable assembly includes a seat assembly and an adjustable hip-limiting assembly at each lateral side of the seat assembly, plus a back assembly pivotally mounted to the seat assembly and an adjustable leg assembly mounted at each lateral side of the seat assembly. No power assistance is required to accomplish tilting of the tiltable assembly or any adjustment of any feature of the chair. The variety of chairs incorporating features of the invention include shower and commode chairs.

Abstract: A safety system for a motor vehicle having a chassis, including a vehicle chair mounted on the chassis for slidably and rotational movement relative to the chassis under inertial forces above a pre-selected threshold acting on the seat and rider in the event of vehicle collision. The vehicle seat is arranged for angular rotation through a gradually growing radius, simultaneously with, and in a direction opposite to, the slidable linear movement of the vehicle seat. Chest and abdomen safety belts are affixed to the vehicle chair. A spring damper system, capable of undergoing large deformation, couples the vehicle seat to the chassis. Preferably, the spring damper system is non-linear, whose stiffness and/or damping coefficients grow with displacement.

Abstract: An office chair includes a tilt control mechanism which connects a seat assembly to a base. The tilt control mechanism defines a pivot connection between the seat assembly and the base whereby the seat assembly effectively pivots about a pivot point in any direction extending radially from the pivot point. The tilt control mechanism includes an annular elastomeric ring which resists multi-directional tilting and biases the seat assembly to a neutral position. The elastomeric ring has a contact area on which the tilting moment of the seat assembly acts which contact area can be selectively varied to adjust tilting resistance.

Abstract: A lift and tilt chair including both motorized lift capability and motorized tilting capability. A hydraulic lift cylinder is provided and operates in conjunction with a motorized tilting system. A seat support is provided having rollers affixed thereto for providing the tilting motion and having the lift cylinder attached thereto for allowing raising and lowering of a patient seated within the chair.

Abstract: An apparatus which will largely prevent irritated ligaments, and sore necks and backs arising from spending long hours at a computer terminal by allowing the user to position themselves in multiple comfortable positions is disclosed. The apparatus for use with a monitor and keyboard comprises: a base; a carriage slidably mounted on the base; a seat member having rear, and front side portions, said seat member carried on the carriage; a back member having a lower side portion pivoted to the rear portion of the seat member; a leg member having an upper side portion pivoted to the front side portion of the seat member; an arm member carried by the carriage, said arm member having a front end portion adapted to carry the keyboard; a monitor arm carried by the carriage; and motorized threaded screws used to move the carriage on the base, and move the back and leg members relative to the carriage.

Abstract: Chair assembly, in particular a chair assembly for use in virtual reality devices, comprising a substructure which comprises a stationary bottom frame and situated above it a top frame bearing a chair, movement means being present between the bottom frame and the top frame, in order to make the top frame move relative to the bottom frame, which movement means comprise drive means and a connecting arm of fixed length which interacts hingedly by way of a top hinge axis with the top frame and hingedly by way of a bottom hinge axis with the bottom frame, wherein the top hinge axis and the bottom hinge axis extend substantially parallel to each other.

Abstract: A reclining chair has a seat structure for supporting a an occupant, a free-standing support assembly for supporting the seat structure, a guided rail system connected to the seat structure and support assembly for allowing an occupant to recline in the seat structure in various positions, and a brake assembly for inhibiting movement of the seat structure. The seat structure includes a frame contoured to comfortably support the occupant. The support assembly includes first and second side members. The guide rail system includes a pair of semi-circular tubular rail members, one rail member connected to opposite sides of the frame, and one or more guide elements mounted to the side members. The frame rotates as the rail members slide through the rail guide brackets, thereby reclining the chair.

Abstract: A wheelchair incorporates a tilt mechanism with a center of gravity compensation by employing a rotary actuator. The actuator is secured to the underside of the seat and has an arm pivotally secured to the frame. A seat pivot axis is located on a movable member that allows the axis to shift from a rear portion of the wheelchair toward a front portion as the seat is tilted from its upright position to a tilted position. This assures that the center of gravity of the user is maintained within the wheelbase of the chair, i.e., compensates for center of gravity.

Abstract: A wheelchair frame has a guide member operatively and slidably connected thereto. A chair is pivotally attached to the slidable guide member. An actuator for moving the chair forward and backward is connected at one end to the slidable guide member and at the other end to the wheelchair frame. A link arm has one end operatively connected to the frame and the other end pivotally connected to the seat of the integral wheelchair. Upon actuation of the actuator, the guide member moves the chair forward or backwards and as a consequence thereof, the seat is tilted backward or forward by the link arm to substantially maintain the center of gravity of a person seated in the chair.

Abstract: A rear seat apparatus for a vehicle is disposed on a rear elevated portion of the floor of the vehicle and allows at least a rear seat cushion, which is a portion of the rear seat apparatus, to swing by approximately 90 degrees toward the front of the vehicle from a horizontal seating state to an upright state. The rear seat apparatus includes a connecting mechanism which connects the rear seat cushion to the floor so as to allow the rear seat cushion to be swung between the seating state and the upright state. In the seating state, the rear seat cushion is disposed on the floor so that a passenger can sit thereon. In the upright state, the rear surface of the rear seat cushion is allowed to abut the vertical wall surface of a stepped portion of the floor.

Abstract: A desk chair particularly designed to have supporting members disposed between guide members having facing complementary grooves, and the supporting members having supporting rollers riding in said grooves whereby the chair responds to movement of the body to retain it in a good posture position, the only force present in said structure being that of gravity.

Abstract: A chair comprises a base with a fixed stem extending vertically from the base and a track member mounted to the top of the stem. The track member is a segment of a circle, the center of which is forward of the chair and coincident with either the knee or ankle of the person utilizing the chair. A carriage having wings which are concentric with the track slides in the track. A seat is mounted on the carriage. The disclosure also relates to a backrest for a chair which pivots around an axis coincident with the H point axis relative to the chair, and to a chair which can shift in response to a person sitting on the chair, the chair also comprising a backrest which pivots around the H point.