Abstract: A portable lift apparatus for use with chairs, seats and the like comprises a bottom portion that is to be placed atop the seat bottom of the chair and a top portion pivotally mounted to the bottom portion. Support brackets are fixed to the top and bottom portions for mounting the top portion for pivotal movement between a lowered position, a raised position and a neutral position intermediate its raised and lowered positions. Springs are provided for urging the top portion toward its raised position. Latches are provided for releasably securing the top portion in the lowered and neutral positions and comprises means for preventing the top portion from becoming unlatched while in the neutral position. The latches further comprise hook-shaped members attached to the top and bottom portions adapted to partially overlie one another to define a latch opening. A latch pin is movably mounted within the latch opening for movement between an unlocking position and an locking position.

Abstract: A chair adapted to passively adjust itself to be in equilibrium with the user's body in relation to changes in the center of gravity and thigh inclination. The chair includes a post from which is provided, in one embodiment, a convex track on which a carriage is allowed to travel, and a seat pan is pivoted on the carriage for angle adjustment relative to the carriage. In another embodiment, a first concave track is provided on the top of the post with a carriage slidable in the concave track and a seat pan mounted for travel in a track on the carriage wherein the second concave track has a smaller radius than the first track.

Abstract: An adjustable sitting device, e.g. a chair with the mutual angle between the seat and the back rest being adjustable, if desired, with simultaneous adjustment of the level of the seat and the back rest, said seat and/or back rest being turnable about an axis that is essentially coincident with an imaginary axis through the hip joints of the user. The lower portion of the back rest has a circle sector shaped cross section and the rear portion of said seat has a correcponding circle sector shaped cross section with a circle sector shaped mounting plate inserted between said portions for a sliding support of said back seat and seat portions.

Abstract: An improvement to the seat having relatively adjustable sections disclosed and claimed in U.S. Pat. No. 3,749,442 to restrict the movement of each separate seat section to movement only back and forth in a longitudinal rocking motion as opposed to universal movement, to thereby more effectively and efficiently assist in the comfort of the individual and adjustment of the seat to movements of the user without causing undue fatigue over time. The improvement includes a seat rocking member such as a cylindrical rod affixed to the lower portion of each seat half and a pair of spaced apart resilient receiving members for each seat half to movably and rotatably support a seat half on the base of the seat. The resilience of the receiving members permits the the seat rocking members to vertically move downward within the receiving members when a force such as the weight of a person pushes downward on the seat.

Abstract: A chair having lifting means for assisting a physically impaired occupant to arise from the chair, having a frame, a seat hingeadly mounted at its forward edge to the frame, seat lifting means, and spring biasing actuating means arranged to spring-bias the seat to an upwardmost position, thereby assisting the occupant of the seat to rise out of the seat.

Abstract: A marine vehicle comprising a hull, a deck supported by the hull, and a seat apparatus mounted on the deck and including a generally vertical seat back member, a seat bottom member moveable relative to the seat back member between a horizontal position wherein the seat bottom member extends generally horizontally, and a vertical position wherein the seat bottom member extends generally vertically and downwardly from the seat back member, and a mechanism for moving the seat back member generally vertically between a lower position and an upper position.

Abstract: A chair having lifting means for assisting a physically impaired occupant to arise out of the chair, the chair having a frame, a seat having its forward edge hingedly mounted on the frame, and means for applying lifting force to cause the rear edge of the seat to be lifted upwardly to assist the occupant to arise, comprising foot-operated lever means arranged to impart lifting force to the seat when the occupant applies foot force to a foot step connected to the lever means, manually operated lever means to apply lifting force when the manually operated lever means is pulled back by the hands of the occupant, means for coupling the foot-operated lever means with the manually operated lever means, and, in a preferred embodiment, spring means providing additional force in assisting the seat to be raised, the arrangement being such that when the occupant steps on the foot step and pulls back on the manually operated lever means, the rear portion of the seat is raised and assists the occupant to arise out of the

Abstract: A marine vehicle comprising a hull, a floor supported by the hull, and a convertible seat/sleeper supported by the floor and including a seat bottom member having a forward end, and a mechanism supporting the seat bottom member for movement between a horizontal position wherein the seat bottom member extends substantially horizontally, and a canted position wherein the seat bottom member is inclined upwardly toward the forward end.

Abstract: The present invention is an orthopedic chair which may be used to assist an invalid to easily sit therein or to rise therefrom. The orthopedic chair includes a frame and a seat which is pivotally coupled to the frame at the front thereof, a back which is mechanically coupled to the frame, a right arm-rest and a left arm-rest both of which are mechanically coupled to the frame. The orthopedic chair also includes a spring tensioning mechanism which resiliently biases the seat, when it is in its first position, toward its second position and a releasing mechanism which releases the seat so that the spring tensioning mechanism moves the seat from its first position to its second position.

Abstract: A tilting mechanism (1), preferably for a chair seat or similar article, comprises a rigid element (2) which, via a mounting means (3), can be attached to a chair base (4), a supporting means (6) adapted to the chair seat and pivotably connected in relation to said mounting means (3), resilient means (8a, 8b) so arranged between the supporting means (6) and the rigid plate (2) that the supporting means (6) can be tilted in relation to said rigid plate (2) under the influence of the resilient means (8a, 8b), as well as locking means (20, 21, 24) for adjusting the seat supporting means (6) to various tilting positions. To achieve a compact tilting mechanism offering separate or individual tightening of the tilting stiffness in the forward direction and the rearward direction without changing the seat angle in relation to the neutral it is, suggested that at least one of the resilient means (8a, 8b) be displaced in relation to the tilting shaft (5) of the supporting means (6).

Abstract: An apparatus responsive to the energy generated by a collision of predetermined force and relative movement between its chassis and drive unit resulting therefrom for actuating a safety mechanism, e.g. for tightening a seat belt.

Abstract: A boat seat which effectively positions a person for paddling a boat such as a canoe or kayak includes an upper platform for supporting the posterior of the person and a lower platform for supporting the knees and shins of the person. The upper platform near its rear end is pivotally connected between the two frames on a substantially radial component of each frame near a rear pivot end thereof. The boat seat includes a device for adjustably stopping the downward pivotal movement of the upper platform front end at a position selected from a plurality of positions along a vertical component of each frame. The lower platform includes a back end which can rest on the boat floor. A front end of the lower platform is adjustably connected between two substantially horizontal brackets which are each affixed to one side in spaced opposition to each other.

Abstract: An invalid chair (10) has a seat (28) which rises (under spring or other power) at the front (36) as well as at the back (38) to assist the occupant to stand. The seat (28) is mounted by means of a mechanism (30) comprising two pairs of tracks (40,46) on the frame (12) and seat (28) respectively, two pairs of levers (50,62) forming a scissor-like linkage (76) with lever ends (52,64) carrying respective rollers (54,66) running in the tracks (40,46), and torsion springs (78) to provide the force urging the seat (28) upwardly. A latch mechanism (102) is provided to latch the seat (28) down. It can be released by a sitting occupant operating a manual device (114) under one arm (18). When the seat (28) rises, the back (38) rises further than the front (36).

Abstract: A variable posture chair (1) including a horizontally oriented seat (2), a vertically oriented body support platform (2) and an upwardly inclined leg support platform (4) is disclosed. At least one of the body support platform (2) and leg support platform (4), and preferably both, are movably mounted with respect to the seat (3) to enable support of the user in any one of six support posture modes. Both the body support and leg support platforms (2,4) are pivotally mounted about a central post assembly (10) for the seat (3). A method of supporting a user on the posture chair (1) is also disclosed.

Abstract: A seat such as an office chair has at least two gas spring units for performing different functions such as adjusting the angles of inclination of the backrest portion and the seat portion of the chair. The gas spring units are operated by a common operating lever having an operating handle at one end while at its second end it is carried in a vertical slot so as to be pivotable in a horizontal direction about the vertical axis of the slot and slidable lengthwise of the slot. At a location spaced from its second end the lever is mounted in a horizontal slot so as to be pivotable in a vertical direction about the axis of the horizontal slot as well as being slidable lengthwise of the horizontal slot, whereby different spring units can be actuated by different combinations of movements of the lever.

Abstract: This device comprises elements for fixing it to slides (6) which are longitudinally movable on fixed slides (10), other elements allowing the mounting of a seat (4) carrying a cushion (3) and a backrest (2), and, on each side of the seat structure, a cam (5) interposed between the slide (6) and the seat (4). There are provided in the cam (5) bearing tracks (7, 8) for the cam (5) on the slide (6) for the adjustment of the cam (5) in height. Jacks (12, 13) control the height of the cam (5) and the attitude adjusting movement of the seat (4) relative to the cam. This device permits the obtainment of the exact required attitude path, is of small overall size and avoids practically all play or vibrations.

Abstract: A vehicle seat adjustment apparatus includes a height control device and an inclination control device mounted on a seat frame for independently adjusting the height and inclination of a vehicle seat. A support base slidably supports a seat in a forward and a rearward direction. The seat frame means is mounted on the support base for supporting the seat. A rear portion of the seat is pivotally attached to the seat. A plurality of links pivotally connect the seat frame to the support base for raising and lowering the seat frame relative to the support base to adjust the height of the seat. The plurality of links include a control link, which is rotatably mounted on the seat frame. The height control device is connected to the control link and holds the plurality of links in a selected pivotal position. The height control device is operative to rotate the control link in a first direction to raise the seat and to rotate the control link opposite the first direction to lower the seat.

Abstract: Attachments and adjustments are applied to conventional chairs which provide a knee rest normally positioned in a retracted position beneath the seat cushion. Special mechanisms permit withdrawal of the cushion to a position facing the seat cushion and tilting the seat cushion to permit use of the chair in a knee rest position and provide for return of the cushion to its original position. Related mechanisms provide for corresponding adjustments to the seat rest and the back rest to effect conversion of the chair from conventional to other uses. The latter include adjustment of the seat rest and back rest to convert the chair for use in a lounge position.

Abstract: In a device for adjusting the support pressure of the passenger's thighs by raising or lowering a thigh support part in a seat cushion, a lock mechanism is mounted both in a seat frame and the thigh support pipe which rotates in the up and down directions of said seat frame. The lock mechanism consists of a lock piece pivotally fixed to a rotating shaft disposed horizontally in the thigh support pipe, a stopper which engages with the lock piece mounted rotatably free to the thigh support pipe and a lock release lever which releases a locking state by pushing said stopper in the direction opposite to its engaging direction.

Abstract: A tilting seat having a base for supporting the seat on the floor and a stem extending upwardly from the base, either integrally or separably from the base, the seat being arranged such that it tilts about a tilting axis passing through the base such that a user can tilt the seat forward when in a working position. The base may be a turntable.

Abstract: The present invention is an improvement in seat construction for seating at least two passengers which includes a seat frame having front and back sides running the length of the frame and left and right sides running transverse of the frame, and is adapted to support at least two passenger seats. In particular, the present invention includes independent thigh support devices for each of the passengers, and a cushion member for each of the passengers which extend from the back of the seat frame and are arranged on each of the thigh support devices for simultaneous movement therewith and each of which have a perimeter dimension for supporting a passenger. Each of the thigh support devices, in turn, includes a thigh support frame pivotally fixed to the back of the seat frame for upward and downward rotation each thigh support frame formed so that it is substantially coextensive with the perimeter of each cushion member.

Abstract: A seat support mechanism for a tilting chair with separate adjustments for front and rear tilt, which mechanism includes interconnected torsion bars which are adjustable to vary the resilient restraining force which opposes rearward tilt of the seat when occupied. The support mechanism also includes a separate torsion member and adjustment to vary the resilient restraining force opposing front tilt of the seat when the seat occupant leans forward.

Abstract: In the self-releasing pawl and ratchet mechanism of this invention, for controlling positions of adjustment of a seat element that is movable relative to a frame element, one member of the pawl-ratchet pair is fixed to one of those elements, the other member is confined to movement relative to the other element in directions transverse to the directions of adjustment of the seat element. A latch for locking the pawl and ratchet members out of engagement with one another is carried by the element that carries the movable member of the pawl-ratchet pair and is actuated in the adjustment directions, between latching and release positions, by a lost motion connection with the other element. In its release position the latch is disengaged from the movable member of the pawl-ratchet pair. In its latching position, wherein it is releasably retained, as by friction, the latch holds that movable member in a ratchet disengaged position.

Abstract: A seating assist device including a base member, a seat member for receiving a person to a seated position, a main spring for simultaneously acting as a hinge between the base member and the seat means, and exerting a resilient force biasing the seat member away from the base member, and an arrangement for adjusting the resilient force of the main spring including at least one helper spring sized for close fitting relation with the main spring. An adjustable spring assembly having a main spring with a generally C-shaped portion, at least one helper spring sized for close fitting relation with the main spring for varying the resilient force of the assembly, and means for securing the helper spring to the main spring including a pair of guides on opposite ends of the C-shaped portion and a pair of corresponding grooves on the helper spring for frictionally contacting the guides when the helper spring is manually inserted within the C-shaped portion, is also disclosed.

Abstract: A chair comprises a pedestal base and a support member (6) mounted on the base. A seat carrier (5) is connected at its forward end portion with the member (6) to be pivotable relative thereto about a first horizontal axis (7), which is fixed relative to both the member and the carrier. A backrest carrier (11) is similarly connected with the member (6) to be pivotable relative thereto about a second horizontal axis (17) and additionally with the seat carrier (5) at its rearward end portion to be pivotable relative thereto about a third axis (23), this axis being movable relative to the seat carrier (5). The carriers (5, 11) are pivotable together relative to the member (6) in the same rotational sense with the backrest carrier (11) traversing a greater pivot angle than the seat carrier (5). A spring unit (32) acts between the member (6) and the backrest carrier (11) to bias the backrest carrier in an upward and forward direction.

Abstract: A chair, specifically engineered and designed for musicians which in both adjustable and stackable. A highly developed human factored design which is mechanically correct has been developed. The basic framework for the seat pan and back support of the chair is specifically designed and contoured to enable a performing musicians to breathe properly while comfortably seated. Blow molded plastic is used for the seat pan having a desired amount of flexibility. The seat pan is covered by molded foam and a stretch fabric to enhance the function and comfort of the chair. This combination of materials prevents degradation of the posture configuration of the pan for the life of the chair. The backrest is similarly designed and provides upper back support rather than just a posture guide.

Abstract: A device for adjusting the height of a cushion pad in the front part of the seat cushion of a seat, for example, for a vehicle, which has a hard plate disposed laterally of the seat cushion under the cushion pad, and a rotating mechanism connected to a shaft disposed under the cushion pad for rockably moving the front edge of the hard plate elevationally up and down between a position in the vicinity of the seat cushion frame and an upper position remote from the seat cushion frame. With this connection, the device can simultaneously adjust the height and the hardness of the cushion pad in response to the occupant's individual favorite value.

Abstract: A biophysiometer having two seat sections which support the right and left sides respectively of a person's body, and are adapted for relative vertical movement and relative tilting movement to positions displacing the two sides of the body relative to one another in a manner tending to correct an abnormal posture condition or otherwise attain a desired treatment effect. The two seat sections are preferably supported by a balancing connection operatively interconnecting them in a relation in which downward movement of one of the sections causes upward movement of the other section, and vice-a-versa. Desirably, the apparatus includes automatic control means which respond to displacement of the two seat sections relative to one another by the weight or positioning of a person's body, and then automatically actuate the seat sections to changed relative positions tending to correct the posture or other abnormal condition sensed by the device.

Abstract: The invention comprises an ergonomic support system for a person in a seated position comprised of torso support platform, a seat, a shin support platform all supported by a main frame generally the size of a common chair, related attachments for facial and arm supports, further includes a pelvic tilt seat for the system to allow alignment of the body and unimpeded movement of the arms and pelvis and a healthy and comfortable position of the spine.The support platforms are preferably padded and shaped to fit the users body telescoping legs for distance adjustment coupled to a pivotal joints for angular adjustment and sliding joints for height and lateral adjustment provide flexibility for these platforms to adjust to an individual body in various positions.

Abstract: The present invention refers to an adjustable seat, particularly for use in buses and trucks. There is described an adjustable seat having a seat portion and a back portion, which permits the correct simultaneous positioning of the back, arms, and legs of a driver irrespective of his stature. The seat includes an adjustable seat portion which may be moved longitudinally towards or away from the seat back portion, such longitudinal movement being accompanied by a simultaneous rotation of the seat portion about a first transverse axis, the angle between the seat portion and the back portion increasing or decreasing as a result of longitudinal motion of the seat portion. There is also described a second mechanism which allows a limited angular rotation of the seat portion about a second transverse axis.

Abstract: A seat mounting for a swivel chair has a channel shaped base member connected to the base of the chair, a T-shaped seat supporting element having a channel shaped bearing member and an angular second member and being pivotable relative to the base member, height and pitch adjusting devices on the base member, and a clamp which is pivotally attached to the base member and supports a backrest.

Abstract: A tilting mechanism for a chair includes a stationary support frame member for connection to an upright chair column, a seat frame member for mounting a seat portion of the chair, and a backrest frame member for mounting a backrest portion of the chair. The seat frame member defines a downwardly directed channel and respective horizontal pivots between parallel sides of the channel to pivotally mount the seat frame member to the support frame member, and the backrest frame member to the seat frame member, allowing the tilt of the seat and the backrest to be adjusted. The support frame member and the backrest member are connected by links to respective toothed quadrant members pivotally mounted in the channel.

Abstract: A sit-kneel chair (10) for distributively supporting the posterior of a user, and the knee and/or lower leg portion of a user. The chair (10) comprises a seat (12) for supporting the posterior of the user, and the knee support (14) for supporting the knee or lower leg portions of the user. The chair (10) further comprising a frame (16) including a first support assembly (20) for pivotally supporting the seat (12) and a second support assembly (22) for pivotally supporting the knee support (14). Means are also provided for selectively altering the linear distance between the seat (12) and the knee support (14). In the preferred embodiment, such means comprise a connector arm (40) secured to the first support assembly (20) for slidably engaging the second support assembly (22).

Abstract: A structure for adjusting the height of the seat of an automotive vehicle including a handle-operated coupler for pivoting supporting members at the four corners of the cushion, the supporting members being mechanically coupled together for raising or lowering the cushion vertically upon the pivoting of an activator supporting member adjacent the handle. The coupler includes a driving device and a coaxial driven device operatively interconnected by a spring coiled about at least a portion of the driving device and driven device, and a housing including a shell closely fitted about the coiled spring. A driven pin is securely fitted to the actuator supporting member for pivoting the actuator supporting member upon the application of lateral force to the driven pin. The driven device includes a driving pin linked to the driven pin for pivoting the actuator supporting member upon the rotation of the handle.

Abstract: A chair comprising a supporting element adapted to tilt about a horizontal axis can be constructed in an ergometrically acceptable way when the supporting element is coupled with the frame through both a torsional spring and a gas spring. In this manner the supporting element can be simply set in the correct position.

Abstract: A chair which is fixed in a single location yet which may be selectively positioned to face any direction includes a seat member, a back member, and two or three legs, a first leg of which is structured to provide an approximately vertical pivot axis disposed at the rear of the chair midway between its sides. A cross member secured perpendicular to the first leg proximate the upper edge of the seat back defines a horizontal axis about which the chair can be pivoted. Arm rests provide grip means disposed toward the front of the chair at a position which gives the user a mechanical advantage so as to easily effect simultaneous pivotal movement about the horizontal and vertical pivot axes. Lightweight in construction, the chair can be readily positioned by the user in any desired direction with an easily executed movement.

Abstract: The present invention relates to a seat for airplanes, buses and like vehicles. The seat comprises a frame, an upholstery support, and a three-piece device for locking both sides of the upholstery support in a selectable pivot position. The locking device includes a stepless adjustable-length bar in the nature of a hydraulic piston, a body for connecting the front end of the hydraulic piston to a front cross member of the seat frame, and a pivot lever for attaching the rear end of the hydraulic piston to a rear cross member of the upholstery support.

Abstract: A device for regulating the position of an element with respect to a support, in which two movable structures are spaced from each other and are fixed to the element, two fixed structures are spaced apart and fixed to the support, and an actuating means comprised of a transverse slide having stepped diameters and slidable in a first structure and engaged in a slot including a plurality of circular apertures having a diameter equal to a larger diameter of the slide and a slot portion interconnecting the apertures having a diameter slightly greater than a smaller slide diameter.

Abstract: A seat height adjusting device has a first link pivotally connected at its lower end to a support member and pivotally connected at its upper end to a front portion of the seat. A device is provided for turning the link about its lower pivotal connection for raising and lowering the front portion of the seat. A second link is pivotally at its lower end to the same support member, and a pin-and-slot lost motion connection is provided between the second link and the member fixed to the seat. Releasable means are provided to maintain the pin at one end of the slot so that the first and second links are held in substantially parallel relationship.

Abstract: A vertically adjustable seat for vehicles which includes a shaft member, an axle connected to said shaft, a lever member operatively connected to a rear end portion of the seat at a first end thereof and to the axle and connected with a shaft member at a second end thereof opposite the first end, a female screw member forwardly and rearwardly moveable and operatively connected to the second end of a lever member by the axle, the handle fixedly connected to a front end portion of the shaft member and a supporting member for supporting the shaft member at front and rear side portions adjacent the female screw member.

Abstract: An adjustable seat bracket particularly useful in connection with vehicular seats, and a set assembly including a seat affixed to the adjustable seat bracket are disclosed. The bracket has first and second support means joined by a hinge at their respective rear portions. The bracket is provided with latch means for releasably maintaining the support members in a fixed angular relationship with each other. In a preferred embodiment, the latch means comprises a slotted catch bar projecting from one support member, and a bolt means movably attached to the other support member and adapted to engage the slotted catch bar.A seat may readily be affixed to the present bracket which is in turn easily attached to a seat support surface.

Abstract: A sofa sleeper having a foldable bed frame connected by a collapsible frame support linkage with a sofa frame. The collapsible frame support linkage includes a novel styling structure that permits the pitch of the seat, when the bed frame is in the sofa position, to be adjusted as desired. This styling structure, in preferred form, includes a styling link incorporated in the collapsible frame support linkage that cooperates with a vertically adjustable styling bolt mounted on the sofa frame. The abutment position of the styling link against the styling bolt, which position depends on the vertical location of the styling bolt relative to ground, determines the collapsed position of the collapsible frame support linkage, thereby establishing the seat pitch of the sofa.

Abstract: The specification discloses a seat pitch adjustment assembly which a user can adjust upwardly or downwardly with basically the same applied force. A seat support is pivotally mounted with respect to a supporting assembly at one point and is joined thereto at another point through a pivot bracket. The pivot bracket is pivotally mounted to the support assembly on one pivot axis and to the seat support on a second pivot axis. The pivot bracketing includes a cylindrical wall defining at least a portion of the wall of a right circular cylinder whose axis of revolution lies on the aforesaid second pivot axis. The cylindrical wall includes at least one helically oriented slot receiving a projection from a slide slidably mounted on the seat support member whereby movement of the slide one way or the other rotates the pivot bracket about said second pivot axis and thereby changes the relative elevation of the first pivot axis with respect thereto.

Abstract: A simple, inexpensive rocker construction for a rocking chair comprising a pair of vertically-spaced, horizontally-disposed plates, the upper of which is adapted for securement to the undersurface of the seat of a rocking chair, and the lower of which is adapted to have swivel connection with a disc to which the supporting legs are attached. A pair of tubular posts are disposed vertically between the plates to provide a sweeping rocking action for the chair. Sturdy coil springs are connected between the plates to hold the latter assembled with the posts and to urge the chair to a normal position it would occupy if no one were sitting in the chair.

Abstract: Seat mounting apparatus, especially for use with tractors and similar vehicles, utilizing a seat supporting mounting plate and support arms adjustably affixed thereto wherein elongated slots defined on the mounting plate permit the arms to be selectively positioned and affixed to the plate in a wide variety of patterns permitting the plate and associated seat to be readily mounted upon a wide variety of vehicles without requiring modification to the vehicle or machining of the plate or seat structure.

Abstract: The inclination adjuster for motor vehicle seats having a seat carrier extending at lateral sides of the seat and being pivotable at its rear end about a pivot axle supported for rotation on a guiding track assembly, includes gear segments secured to the lateral sides of the track assembly; a transverse axle supported in horizontal guiding slots in the side walls of the seat carrier and each supporting for rotation a gear pinion; a holding bracket having a vertical cutout defining superposed recesses for receiving the shaft in a selected vertical position of the seat and a free vertical passage; and a hand-operated and spring-biased arresting linkage normally urging the transverse shaft into the selected recess and permitting the movement of the shaft in the guiding slot to adjust the vertical position of the seat when actuated.

Abstract: This invention is a reclining and rocking article of furniture comprising as an integral part of its construction a structural body shaped in a unique way to allow for a smooth reclining transition from a sitting to a lying down position while the user experiences full body support, and a variable weight positioned in such a way as to serve as a leverage device for balancing the article and as a means to facilitate rocking motion.

Abstract: The chair described has a single support leg carrying a support plate. An elongate member is pivotally secured to the support plate. A back rest is rigidly secured to the rear end of the elongate member while a seat portion bearing support is pivotally secured to the front end of the elongate member. Separate means are provided on the support plate to vary the inclination of the rear end of the elongate member, and therefore the back rest, and to vary the inclination of the bearing support and therefore the seat portion which it supports.

Abstract: A seat cushion is mounted on the seat base for forward and rearward adjusting movement with respect to the seat back by a mounting arrangement having latch members that also latch the seat cushion to the seat base while permitting tilting movement of the seat cushion.

Abstract: A folding chair having a pair of X-shaped cross leg braces wherein the front and rear upper end portions of the leg braces are respectively connected to the front and rear end portions of a pair of arm rest bars by connecting means so as to cause them to swing relative to each other. When the folding operation of the chair is performed by each connecting means, both arm rest bars can approach each other in a manner that two planes including the respective arm rest bar are parallel to each other. The inclination of the seat can be varied by manually operating the connecting means on the back of the chair.