Abstract: Wheelchair of which a sitting support is pivotable about a virtual or non-virtual pivot axis, extending substantially horizontally, substantially at right angles to a main driving direction of the wheelchair, wherein the upper part of the body of the user, at least its center of gravity, viewed in the main driving direction, lies behind the pivot axis and wherein the pivot axis is located preferably adjacent the hinge point of the knees of a user seated in the wheelchair during use. The sitting support may be freely pivotable about said pivot axis or be fixed at a particular pivot angle. The pivot axis can for instance be designed as a torsion bar.

Abstract: An articulated seating mechanism including a rocker base, a seat plate, and a pair of side rails, each having an arcuate side. The side rails may be disposed downwardly from the seat plate or upwardly from the rocker base. First and second arcuate gear portions are disposed on the arcuate side of each of the side rails and a first and second substantially flat or linear gear racks are affixed either to the underside of the seat plate or the upper side of the rocker base, so as to bring the linear gears and the arcuate gears into intermeshing relationship. A back support is pivotally connected to the seat plate and to first and second back links, and the back links are pivotally connected to the rocker base to provide a rocking motion of the seat plate and a dynamic synchronous adjustment of the angular variation between the seat plate and the back support. The linear gear racks move in a tangent to the arcuate gear portions to provide a moving fulcrum during rocking movements.

Abstract: A lifting chair, having a seat which is pivoted upward, being hinged along its front edge to help lift an individual who has trouble rising from an ordinary chair, also has arms which move upward during this pivoting process. Similarly, the seat and arms are moved downward to help the individual sit down. The linkage preferably is a parallelogram type preventing rotation of the arms as they are moved upward and downward along arcuate paths.

Abstract: A tilt chair having a foot adapted to be supported by a support surface and a first leg pivotally mounted to the foot. A second leg is pivotally mounted to the first leg. A moveable support member is mounted to the second leg and is adapted to be supported by the support surface. The moveably support member is moveable in a first and second direction toward and away from the foot respectively as the first leg pivots relative to the second leg and as the first leg pivots relative to the foot. In one embodiment, the moveable support member is configured as a wheel. In one embodiment, a lower back member has a lower end pivotally mounted to the first leg and an upper back member pivotally mounted to an upper end of the lower back member. A restraining link is pivotally mounted between the lower back member and the second leg. An upper back link has a lower end pivotally mounted to the first leg and an upper end pivotally mounted to the upper back member.

Abstract: A foldable safety rail includes at least one fixing seat attachable to a wall, and at least one armrest body pivotally mounted on the at least one fixing seat. Thus, the armrest frame of the armrest body is located at the horizontal state rigidly and stably when in use so that a user holds safely the armrest frame of the armrest body so as to provide a support effect to the user. In addition, the armrest frame of the armrest body is movable to be parallel with the wall, so that the safety rail is folded when not in use, thereby saving the space occupied by the safety rail.

Abstract: A high-technology armrest with integrated buttons connected to a command transmission cable for the adjustment of the seat and the seat back movements of an office chair with articulations for the synchronized movement of the seat plane and the seat back. The invention includes a mobile base of the “rocket launcher” type, from which base a column rises, which is adjustable in height, and which supports the seat plane and the reciprocally hinged seat back. A first armrest of the office chair is equipped near the front end with two side-by-side buttons. A second armrest of the office chair, designed symmetrically to the first, is equipped near the front end with a single-control button, for the function of adjusting the height of the chair.

Abstract: A passenger seat for a vehicle includes a seat back; and a seat bottom. The seat bottom is selectively moveable between a first, generally flat position for supporting a passenger in an upright seating position with the passenger's hips located at a first height above the floor, and a second, raised position for supporting a passenger in a semi-standing position wherein the passenger's hips are positioned at a second height above the floor substantially greater than the first height.

Abstract: A seating device in the form of seat furniture or for placing on seat furniture. The device comprises a seating element which can be pivoted transversally to the seating direction in relation to a support element about at least one axis. The seating element can be moved in the seating direction (X) in relation to the support element by means of at least one actuatable regulating device, and a regulated self-locking position is fixed.

Abstract: A tilting seat bottom assembly for a passenger seat includes: a seat pan assembly for supporting a passenger and a pivot assembly for being attached to the seat frame. The seat pan assembly is mounted for pivotal motion about at least two axes relative to the seat frame, and can be locked in a selected orientation by the passenger.

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 seating structure 30 includes spaced housings 34 and 36 between which a seating portion 92 of a platform 60 is located. The platform 60 is also formed with non-seating portions 94a and 94b at opposite sides of the seating portion 92, which are isolated and are within the housings 34 and 36, respectively. The non-seating portions 94a and 94b engage resilient elements 90a through 90h above and below the non-seating portions. When a user sits on the seating portion 92, the resilient elements 90a through 90h provide a buoyant and floating experience for the user. The seating portion 92 is movable relative to the housings 34 and 36 to allow for outward movement and for a rocking action.

Abstract: A chair is operable between a seating position and a rise-assist position. The chair comprises a base; first and second legs; a seat pivotally connected to the first and second legs; and a back pivotally connected to the seat. The chair further comprises first and second members pivotally connected at a first end to the legs, and pivotally connected at a second end to the back. At least portions of the legs, first and second members, back and seat form first and second four-bar linkages, respectively. At least one biasing member is pivotally connected at a first end to one of the base and at least one of the legs and pivotally connected at a second end to at least one of the four-bar linkages. The at least one biasing member operates to assist movement of the chair between the seating position and the rise-assist position.

Abstract: A seating device comprising a connecting element having an end portion dimensioned to be releasably and rotatably inserted into an aperture defined in a ground or floor. The aperture is dimensioned to receive the connecting element so as to support the seating device. The seating device also comprises a supporting element connected to a seat. The supporting element is pivotably connected to the connecting element. Moreover, at least one of the connecting element and supporting element comprises at least one stop so as to permit the supporting element to pivot between a first position whereat the supporting element is in a substantially vertical position, and a second position whereat the supporting element is forwardly inclined of 30 degrees or less with respect to the first position. Such a device is particularly useful for persons who need to stabilize their posture while performing a task.

Abstract: A seat is pivotally connected to a frame of a wheelchair and is connected by one or more resilient supports. Each support includes a housing attached to either the seat or the frame and a bracket arrangement attached to the other of those wheelchair components. A spring biases the bracket arrangement with respect to the housing and an adjuster enables the force of the spring to be varied to alter resiliency of the support.

Abstract: A removable anatomic seat (10) comprises a support structure (22) for an anatomic seating recess (20) for a user, where the structure is rested above a piece of furniture (14) and where the recess (20) is hinged at least one end (at 24) to the structure (22), being foreseen lifting elements (30, 32, 34, 36, 38, 40, 42, 44) to tilt the recess (20) with respect to the structure (22).

Abstract: A rocking chair has a flexible joint between a chair base and a chair component permitting rocking action. The flexible joint includes a housing with a plurality of internal surfaces. A plurality of compressible rods are disposed within the housing and a rigid member extends among the rods to engage the rods against the internal surfaces of the housing. The rigid member is attached to either the chair base or the chair component while the housing is then attached to either the chair base or the chair component whichever is not attached to the rigid member.

Abstract: A lifting toilet chair having arm rests which are utilized to provide a leveraging action to allow the user to control the ascent and descent of a pivoting toilet seat as well as to assist the user in raising himself/herself from a sitting to a standing posture.

Abstract: A chair has a seat connected to a support leg in an up and down angularly displaceable manner, elastic elements for propping up a rear end of the seat to a higher position, and a mechanism for limiting position of the seat when the seat seats people; the mechanism has an adjustment rod, a gear turnable together with the adjustment rod, an elastic plate for engaging the gear so as to prevent rotation of the gear when the adjustment rod isn't operated, and eccentric cams for holding the seat at desired position when the chair seats people; the cams can turn together with the adjustment rod, and are each formed with a stopping edge having several sections; thus, the depressed position of the seat, i.e. the position when the seat seats people, is decided by the position of the cams, and the seat can move accordingly when the sitter leans forwards.

Abstract: A chair, in particular an office chair, comprising: a base structure, a seat support structure, articulated to the base structure around a transverse axis, an adjustable elastic device to apply an elastic force between the base structure and the seat support structure, a manually operated adjustment device for varying the distance between said adjustable elastic device and said transverse axis.

Abstract: An apparatus to automatically raise and lower a planar member, particularly a seat, that includes a number of pivotally connected support members, all attached directly or indirectly to a base member, one of the support members being mechanically actuable, vertically extending, and vertically extendable. The seat or planar member has a range of motion that is restricted to the middle portion of the base member, the base member having a portion extending forwardly therefrom.

Abstract: A chair, in particular office chair, comprises a seat support with a front seat support part and a rear seat support part which is pivotable in relation thereto about a horizontal pivoting axis. An adjustable-length energy storing device, which is articulated to the seat support parts, serves for adjustment of the two seat support parts relative to each other. An interlocking mechanism is provided for locking the pivotability of the seat support parts relative to each other, the interlocking mechanism being designed for providing a plurality of positions of interlocking of the front seat support part relative to the rear seat support part. The seat support parts of the chair can therefore be interlocked in a selected position of interlocking, meeting a user's wishes. This helps put into practice a chair that offers improved ease and convenience of sitting.

Abstract: A seat for vehicle use, the front portion of which is capable of tipping up. The seat includes a seat back, a seat cushion, a tip-up unit which tips up a forward end side of the seat cushion from a base position to an upward tip-up position, and a rock unit which holds the seat cushion at at least one position between the base position and the tip-up position. The seat cushion includes a front seat cushion positioned at a front side of a vehicle and a rear seat cushion positioned at the rear of the front seat cushion. The front seat cushion is provided with the tip-up unit. The rock unit includes a first gear and a second gear both mutually engaged so as to permit tip-up motion of the seat cushion and restrict the tip-down motion of the seat cushion.

Abstract: A seat adjuster system includes a shaft and an elongated member. In another aspect of the present invention, the member is a lever which is attached to the shaft by an interference fit. A further aspect of the present invention employs hydro-forming of the shaft to attach the member to the shaft, which is preferably a torsion tube for an automotive seat.

Abstract: In case the seat portion of the inclining chair is inclined periodically, if a supporting shaft to incline the seat portion is arranged away from a position supporting an ischial tuberosity portion of a seated person in an ordinary posture of sitting, an upper body of the seated person makes an up and down movement widely in compliance with a periodical inclining movement of the seat portion, which might cause dizziness due to a vertical shock to the upper body of the seated person.

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: The vehicle seat (10) comprises at least one electrically powered functional member (24, 26, 28, 30, 31, 32, 34, 38). This functional member comprises an active element (24E, 26E, 28E, 30E, 31E, 32E, 34E) designed to perform a unique elemental function; a local control unit (24D, 26D, 28D, 30D, 31D, 32D, 34D) for controlling an active element (24E, 26E, 28E, 30E, 31E, 32E, 34E); units (24B, 26B, 28B, 30B, 31B, 32B, 34B) of receiving commands; and units (24F, 26F, 28F, 30F, 31F, 32F, 34F, 38F) for collecting operational status data from the functional member (24, 26, 28, 30, 31, 32, 34). The seat comprises a communication bus (42) to which each of the receiving units (24B, 26B, 28B, 30B, 31B, 32B, 34B).

Abstract: In the case of a geared fitting (1) for a vehicle seat adjuster, having a first internal-geared wheel (11) and a second internal-geared wheel (22) which is mounted rotatably relative to the first one and is arranged axially thereto, as central gear wheels, and having at least one revolving planet wheel (18) which is arranged axially between the internal-geared wheels (11, 22) and is in engagement with the two internal-geared wheels (11, 22), the second internal-geared wheel (22) is mounted on the first internal-geared wheel (11) with an undulating and/or polygonal bearing bushing (21) positioned between the internal-geared wheels.

Abstract: An electric seat assist device having a seat pivotally secured to a base. One or more cam members extend in generally opposing relationship from the seat and base and are seated on one or more sets of rollers which are linearly adjusted to raise and lower the seat by a drive member which is pivotally mounted relative to the base and the rollers of the seat assist device. Stroke detectors are used to control motor drivingly connected to the drive member after being activated to initiate raising or lowering of the seat.

Abstract: The invention relates to a seating device in the form of seat furniture or for placing on seat furniture. Said device comprises a seating element (2) which can be pivoted transversally to the scating direction in relation to a support element (8) about at least one axis (3). The seating element (2) can be moved in the seating direction (X) in relation to the support element (8) by means of at least one actuatable regulating device, and a regulated self-locking position is fixed.

Abstract: A seat suspension system includes a first seat (e.g., a base) member and a second seat (e.g., a seat) member preferably overlying the first seat member. At least one spring (e.g., elastic or rubber) mount is interposed between the first and second seat member. The at least one elastic mount provides a projected elastic center spaced from (preferably located above) the second seat member such that the second seat member is pivotable about the projected elastic center. Embodiments describing seat suspension systems having a single focalized mount or a plurality of spaced apart, focalized mounts are included.

Abstract: A seat arrangement for sitting furniture such as chairs has a seat member and a support arranged underneath the seat member, wherein the support has an elastic body allowing a tilting movement of the seat member about a pivot point arranged at the central seat member area. The elastic body is arranged at the center of the seat member and has an upper side and an underside. The support has a rigid top plate fixedly connected to the upper side of the elastic body and a rigid bottom plate fixedly connected to the underside of the elastic body. The top plate is correlated with the seat member and the bottom plate is correlated with an underframe of the sitting furniture. The same type of tilting support can also be arranged on a back rest of a chair.

Abstract: A stand aid is provided with at least one sitting surface that is arranged on a support frame and can be adjusted between a load-free rest position and at least one sitting position in which it is subjected to the load of a user, whereby adjustment is carried out by the support frame which automatically readjusts the sitting surface back into the rest position by a resetting mechanism as soon as the load of the sitting surface is removed. The aim of the present disclosure is to provide a stand aid that takes over as much of the strain of standing as possible. To this end, the support frame is provided with a pivoting mechanism, can be anchored at a bottom and is provided with at least one support leg. The support frame rests on the support leg in the sitting position in order to receive the vertical forces and define the adjusting angle at the bottom.

Abstract: A seat assembly (21) including a seat (22), a backrest (23) and a mounting assembly (24) mounting the seat (22) in a near horizontal orientation for movement along an upwardly concaved arcuate seat path having a center of curvature (37) proximate the center of mass (39) of a person seated on the seat, and the mounting assembly (24) further mounting the backrest (23) in a near vertical orientation for movement independently of the seat along a forwardly concaved arcuate path having a center curvature (37) proximate the center of mass (39) of the person. An adjustment assembly (61) is provided for adjusting the radius of curvature of the path of motion of the backrest (23). Also provided are a backrest tilt adjustment assembly (71), an armrest adjustment assembly (90), a seat biasing assembly (110) and a seat motion latching assembly (111). A method of self-adjusting support and alignment of a backrest also is disclosed.

Abstract: Disclosed is a chair and a method using the chair, which can be not only used easily and comfortably but also utilized in treating an improper alignment of spinal vertebrae. The chair has a seat assembly for seating the user on the seat assembly, the seat assembly being operated by the user in such a manner as that the user can adjust a height of the seat assembly; a backrest assembly for supporting a back of the user, the backrest assembly being operated separately from the seat assembly by the user in such a manner that the user can adjust a height of the backrest assembly; a headrest assembly for resting a head of the user on the headrest assembly, the headrest assembly being assembled with the backrest assembly; and a backrest frame for supporting the backrest assembly and the headrest assembly, the backrest frame being fixed to the seat assembly, the backrest assembly moving along the backrest frame when the height of the backrest assembly is adjusted.

Abstract: The present invention concerns an apparatus for adjusting the vertical and longitudinal position and the inclination of a pivotable seat part (2) of a vehicle seat (1) relative to a floor structure (4) of the vehicle, having a linkage that encompasses a linkage part, constituted by at least one articulated rectangle (ABCD), that has a base (ABe), two rockers (BC, AD), and a coupler (CD). The base (AB) is arranged in a plane extending substantially parallel to a longitudinal seat axis (X-X). The rockers (BC, AD) are pivotable about rotation axes extending substantially parallel to transverse seat axis. The linkage encompasses two linkage parts, each constituted by at least one articulated rectangle (ABCD; CDEF), that each have a base (AB, CD), two rockers (BC, AD; DE, CF), and a coupler (DC, EF).

Abstract: A chair back upright tilts about a pivot axis with respect to a chair seat plate and has a protrusion on the bottom portion thereof. When the occupant of a chair reclines, the protrusion on the back upright and a stop plate make contact with each other. The contact stops the tilting of the back upright. A lever handle, fixedly attached to the stop plate, can be rotated thereby providing more or less tilting of the back upright before contact between the protrusion and the stop plate occurs.

Abstract: The invention concerns an adjustable work chair such as an office chair having a height-adjustable seat comprising a front seat part (2) and a rear seat part (3) connected by a hinge (4) that extends transversely of the seat. A first arm (15) is coupled between the front part of the seat and the head of a fixed part (13) of a seat lift (14), and a second arm (16) is coupled between an extendable piston of the lift (14) and the underside of the rear part (13) of the seat.

Abstract: A locking mechanism (11) suitable for use with office type chairs comprising an operating lever (13) movable between a locking position in which locking takes place and an unlocking position in which unlocking takes place, a spring, which biases the lever (13) into the locking position and a catch (23, 27, 29), which holds the lever (13) in the unlocking position upon movement of the lever (13) into the unlocking position. The catch (23, 27, 29) is disengaged when the lever (13) moves past the unlocking position. Upon disengagement of the catch, the lever (13) returns to the locking position under the action of the spring.

Abstract: An electric seat assist device having a seat pivotally secured to a base. One or more cam members extend in generally opposing relationship from the seat and base and are seated on one or more sets of rollers which are linearly adjusted to raise and lower the seat by a drive member which is pivotally mounted relative to the base and the rollers of the seat assist device. Stroke detectors are used to control motor drivingly connected to the drive member after being activated to initiate raising or lowering of the seat.

Abstract: An anti-submarine device installed to the seat frame of an automobile for preventing a submarine phenomenon, and more particularly, an anti-submarine device capable of providing a passengers with comfort when sitting and rigidly holding the buttocks of a passenger at the front end of a seat cushion by a protruding means which protrudes the front end of the seat during a head-on collision or sudden stop.

Abstract: In the case of a vehicle seat, in particular a motor vehicle seat, having a seat frame (3), a seat shell (21) which is fitted to the seat frame (3) and bears a seat cushion (23), and an inclination adjuster (11) by means of which one part (19) of the seat frame (3) and/or of the seat shell (21) can be moved in order to adjust the inclination of the seat cushion (23), the seat shell (21) is fitted at one end to the movable part (19) of the seat frame (3) and at the other end is mounted on a fixed part (7) of the seat frame (3) in a manner such that it can be moved by means of a guide (29).

Abstract: The seat frame can either come with a height adjustment device of the seat frontal edge or not. Its seat carrier has at least one side part, one front arm means and one longitudinal adjustment device. The side part is provided with a first bore and a second bore. The front arm means is either realized by a parallelogram arm or a pair of arm means. The parallelogram arm has a first bearing member cooperating with the first bore. The pair of arm means is composed of an upper arm and a lower arm and a device for adjusting the angular position of the upper arm relative to the seat carrier. The upper arm is provided with a second bearing member which is spaced from the common joint and cooperates with the second bore. Both arms are pivotally joined together in a common joint.

Abstract: A lift seat specifically suited for assisting an individual from a seated to a standing position or from a standing to a seated position. The lift seat has a hinged seat platform that is pivotally coupled with a base platform and a lift link assembly coupled to a wheeled carriage. The wheeled carriage is driven linearly by a motor powered lead screw that operates in either direction of rotation to advance the position of the carriage. The movement of the carriage in one direction causes the lift link assembly to raise the seat platform while the movement in the opposite direction causes the platform to lower.

Abstract: A seat structure for a chair which has a frame with a front frame section and a rear frame section, the front frame section and rear frame section being joined by an articulation joint such that the front frame section may be articulately moved with respect to the rear frame section. There are provided stopper means to limit the degree of articulation of the front frame section. There is also provided means for connecting the front and rear frame sections together.

Abstract: A bicycle seat and adjustable mount includes an arcuate rail extending generally upward and backward from a base mounted on a bicycle seat post, and a seat support slidably mounted on the rail and capable of being positioned at various positions along the rail. The seat support preferably carries a seat having a planar laterally elongated base with terminal upstanding hip restraints to position the rider on the seat.

Abstract: A wheelchair with a tiltable seat locates the tilt fulcrum between 3 and 7 inches from the front edge of the seat pan and between 1 and 4 inches below the surface of the seat pan. This minimizes the elevation of the rider's knees when in a tilted position, and allows for more stability and a shorter wheel base. Manual self-tilting is facilitated by a gas strut arrangement disposed on brackets below the seat pan, and operated by a rider-controlled valve.

Abstract: A vertical movement apparatus for a vehicle seat includes a first bracket adapted to be secured on a floor side member, a second bracket arranged to be adjustable relative to the first bracket, a sector gear disposed between the first bracket and the second bracket, and a braking mechanism having a pinion gear that meshes with the sector gear. The first bracket and the second bracket are pivotally connected to each other and the sector gear is pivotally connected to the second bracket and engages the first bracket via a slide member secured on the sector gear.

Abstract: An improvement in an ARMCHAIR WITH SEATLIFT, as patented in U.S. Pat. No. 5,816,655 designed for a disabled person, or a person with weak legs, the armchair having a seat able to move vertically up and down in the frame of the armchair from a normal seating position to a position flat on the ground, the improvement being: making the armchair automatically mobile and automatically immobile when desired, by attaching wheels to the armchair in such a manner that the armchair automatically becomes mobile by making the wheels automatically become in contact with the ground when the seat moves to it's upper position, and automatically making the seat become in full frictional contact with the ground when the seat is in it's lower position, thereby facillitating the transfer of a person, fallen on the ground, safely onto the seat, without the seat tending to move away from the person during the transfer.

Abstract: A manual uplift apparatus comprising a structural frame unit, a mechanical uplift assembly unit, and a power translating mechanism connecting the two units to allow the user to more easily obtain a standing position from a previously seated position. A second use for the apparatus may be as an exercise product for exercising upper body muscle groups. The structural frame unit is used to support and guide the mechanical uplift assembly unit. The mechanical uplift assembly unit has two sections that can independently move vertically with respect to the structural frame unit. One section has a seat, the other has rails or hand engagement handles. When downward force is applied to the hand engagement handles, the section having the handles move vertically downward and produces an upward force in the section having the seat through the power translating mechanism.

Abstract: A device for adjustment inclination of a chair seat has a spindle rotatable upon applying a torque and a seat bearing member, which is mounted on the spindle. The seat bearing member is displaceable axially along the spindle and pivotal about an axis which extends perpendicular to the spindle, to provide the chair seat with angular displacement.