Abstract: A seat comprises a base assembly adapted to be fixed to the body of the vehicle, an articulated support assembly comprising front and rear support links for a seat cushion of the seat each of which has two ends articulated about axes which are respectively fixed relative to the seat cushion and to the base assembly, devices for adjusting the angular position of the support links relative to the seat cushion, and devices for controlling the position of a seat back of the seat relative to the seat cushion. The control devices comprise a convex or concave articulated quadrilateral, which has four corners, a first corner is connected to the seat cushion and the second and fourth corners are connected to the seat back.

Abstract: The invention is based on an apparatus for adjusting a vehicle seat, the position of which can be adjusted via one or more geared motors (8, 38, 41, 42), wherein the geared motors (8, 38, 41, 42) can be actuated via a control (24). A vehicle seat underbody (3, 32, 45) is supported at at least three points by means of driven lifting spindles (16), driven guide bars (28, 39, 40) or sliding fixtures (34, 35, 43), wherein at least one support point (16, 29, 34) can be varied relative to the other remaining support points of the vehicle seat in such a fashion that a spherical seat adjustment results.

Abstract: The ergonomic chair of the present invention provides a seating system that allows an occupant, while seated, to shift his or her position while exercising major muscle groups. The present invention chair includes a seat support frame that supports a seatrest and a backrest. The seatrest and the backrest are connected so that they can pivot relative to each other. The backrest of the invention chair can move along backrest tracks mounted to the frame between a lower resting position and a raised extended position. Because the seatrest is hinged to the backrest, it moves with the backrest by translating and rotating in relation to the frame. The seatrest is supported by the seat support frame so that the seatrest can slide and rotate in relation to the seat support frame. The occupant of the invention chair can push against the backrest, translate the backrest along the backrest tracks, stretch out into the extended position and then return to the resting position.

Abstract: A wheelchair is provided, having a recline mechanism for the chair back and wherein the seat is repositioned forward in response to recline to reposition the user's weight relative to the supporting wheels. The chair is also independently equipped with a weight-shifting tilt mechanism. Moreover, a bilateral tracking mechanism (i.e., controlled motion is transmitted to both sides) is used to reposition the seat. This avoids torque due to uneven loading of the chair. Back canes of the chair and/or brackets on the chair back are slotted to enable infinite adjustment of chair arms, ventilator trays, and other accessories.

Abstract: A wheelchair has a base and further comprises a seat frame mounted for tilting with respect to the base, and a seat frame tilting mechanism for rotating the seat frame with respect to the base. A back frame is mounted for reclining with respect to the base, and a back frame recline mechanism is positioned for rotating the back frame with respect to the base. A controller is provided for separately controlling the seat frame tilting mechanism and back frame recline mechanism so that the seat frame and the back frame can be rotated independently.

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 chair seat tilt lock mechanism has a detent to latch an actuating lever in a locked and unlocked position. When the lever is moved to a locking position, a spring urges a moveable locking member toward a locking position, however, the moveable locking member only moves to its locking position when the chair is tilted to properly register the moveable locking member with a fixed locking member. When the lever is moved to an unlocking position, another spring urges the moveable locking member to an unlocking position. The moveable locking member may be a slider which slides under a fixed abutment to lock the chair from tilting. Alternatively, the moveable locking member may be a pivoting arm with a series of openings which may receive the forked end of a tongue in a locked position.

Abstract: A folding chair having adjustable rear legs for use on flat, even ground and in addition, on sloping terrain from about zero degrees to twenty degrees and being continuously adjustable over this range by a user in a seated position.

Abstract: A portable recliner assembly includes a recliner seat having a plurality of spaced-apart first connectors, and a support having a second connector that is selectively coupled to one of the plurality of first connectors. The recliner seat can have first and second side walls, and at least one side connector provided along each of the first and second side walls, with each side connector adapted to couple a side connector from another recliner seat.

Abstract: A latch assembly for use in a vehicle having a movable component such as an upper seat frame member and a fixed component such as a lower seat frame member. The latch assembly is operable to allow selective movement of the movable component relative to the fixed component. The latch assembly includes a first frame member adapted to be fixed to the fixed component of the vehicle seat and a second frame member adapted to be fixed to the movable component of the vehicle. The second frame member is coupled to the first frame member for movement between a first operative position, such as a set position, and a second position such as a titled position. The latch assembly also includes a locking mechanism, a release mechanism, a spring, and a lockout cam.

Abstract: An office chair is provided. The office chair includes an eccentric adjustment of the tilt of the seat surface. In order to prevent against undesired tilt adjustments, it is provided to use a rotating shaft with a manipulation part and a functional part for the eccentric adjustment and to control a disengageable locking catch, which blocks any rotating angle adjustment of the functional part of the rotating shaft in the non-disengaged state by the manipulation part in a first rotating angle region.

Abstract: A vehicle seat assembly comprising a seat back and a seat bench that pivot relative to each other so that the seat back may be locked generally upright to provide a seating position or locked generally folded onto the seat bench to provide a cargo position. The seat assembly is mounted to the floor of the vehicle using front and rear latches which engage respective front and rear anchors. From the upright position, the seat assembly may be rotated forward to provide access to and egress from the area behind the seat. From the folded position, the seat assembly may be pivoted forward to provide additional cargo space. The seat assembly is configured to facilitate installing and removing the seat assembly by preventing the latches from contacting the anchors until such contact is desired. The seat assembly is also configured to facilitate moving the seat while in the vehicle and while removed from the vehicle.

Abstract: An inclinable seat arrangement, in particular for a sick or handicapped occupant, is described. It comprises a framework (2) and an inclinable seat (3) connected to the framework by an articulation (4) and by a positioning mechanism arranged so as to facilitate the manipulations for inclining the seat by the occupant or by another person. The axis of the articulation (4) is preferably located proximate a vertical line passing through the center of gravity (G1) of the occupant when in a position corresponding to the equilibrium position of the empty seat. An elastic mechanism, exerting a progressive return couple toward the equilibrium position, comprises elastic bearings (24) within the articulation. The elastic mechanism also preferably comprises a constant force gas thrustor (6) which includes a controlled blocking arrangement. In place of the gas thrustor there may be provided a motorized jack (51) controlled by the occupant (48).

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 is adjustable axially toward and away from the pivot point to adjust resistance to tilting.

Abstract: A simplified reclining mechanism, as for chairs and seating, is herein described. The balanced design of such a reclinable chair for yard or patio usage is herein described. The reclining mechanism is an integral part of the chair or seat. The contoured design of the seat, back, legs and headrest gives firm, comfortable support to all parts of the body in both positions. What makes this chair stand above the rest is its unique 2 position balanced design. In the upright position it functions as a chair with head and legrest. Balance is the key to this design. By slightly throwing or shifting your weight backwards, this chair teters, giving a feeling of weightlessness and falling backwards until it lands solidly on its rear legs. In this position, every part of the occupant's body is cradled by the design. This chair also has the health advantage of having your legs lifted and held at heart level.

Abstract: An adjustable baby chair is disclosed. The baby chair has a first locking device; a height adjusting device; a seat adjusting device; a second locking device; and a foot rest. With such an arrangement, the feet of the chair are foldable, the angle, height of the seat are adjustable, the seat is fixed after the baby is seated in the seat and the height of the foot rest is adjustable.

Abstract: A flexible chair includes a seat frame having a bidirectional fabric stretched over the seat frame to define seat back and seat bottom portions. The seat frame is supported on an upper axis and a lower axis by a flexible frame. In one embodiment, the flexible frame is a substantially continuous symmetrical loop defining arm portions. The arm portions are supported by a pair of u-shaped support forks. The connection geometry between the forks and the frame may be adjusted to provide varying degrees of flex from the chair frame. In another embodiment, the flexible frame is a pair of symmetrical loops including ground supporting portions.

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 provides a seat mounted to a base preferably through use of a universal joint to provide for selective orientation of the seat. A pair of actuators are interposed between the seat and base so that selective extension and retraction of the actuators orients the seat as desired. A level sensing device(s) provides suitable output signals to control the extension and retraction of the actuators, and thus the final orientation of the seat. This allows a wheelchair occupant to remain level while the chair traverses uneven ground or to selectively reposition the seat to relieve pressure points without the assistance of an attendant.

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: 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: A multiple position, reclining and stretching chair includes a base structure having side walls with corral openings into which the ends of an axle extend. The axle is rotatably secured to a lumbar platform that is a part of a multi-panel body support platform assembly. The body support platform assembly is positioned above an arcuate, adjustable, lockable, contact support structure that pivots forward and rearward about one or more pivot members either or both of which that may be substantially attached to the base structure. The contact support structure may also comprise two sets of independently acting contact support members that allow the front roller to move independently of the rear roller. Also disclosed is an embodiment wherein the arcuate roller assembly rocks back and forth about the surface of a horizontal cross support member of the base structure.

Abstract: A vehicle seat assembly comprising a seat back and a seat bench that pivot relative to each other so that the seat back may be locked generally upright to provide a seating position or locked generally folded onto the seat bench to provide a cargo position. The seat assembly is mounted to the floor of the vehicle using front and rear latches which engage respective front and rear anchors. From the upright position, the seat assembly may be rotated forward to provide access to and egress from the area behind the seat. From the folded position, the seat assembly may be pivoted forward to provide additional cargo space. The seat assembly is configured to facilitate installing and removing the seat assembly by preventing the latches from contacting the anchors until such contact is desired. The seat assembly is also configured to facilitate moving the seat while in the vehicle and while removed from the vehicle. A cupholder is included in a cover for the seat assembly.

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 front seat assembly (10), comprising first and second seats, is to be installed as a unit into a vehicle (12). A plurality of brackets (18) and (20) are attached to fixed rails (16) for attachment to the vehicle (12) and for interconnecting the fixed rails (16) of the two seats making up the front seat assembly (10). A slide rail (24) is supported by each of the fixed rails (16) for fore and aft movement relative to the fixed rails (16) and a pair of front (28) and rear (30) cross beams interconnect the slide rails (24) for supporting all of the remaining components of each seat. The rear cross beam (30) has an triangular cross section and a seat back (34) is supported on the rear cross beam (30) by flanges (32) having an triangular opening (36) complementary to and surrounding the rear cross beam (30). A support sheet (40) extends between and is supported by the cross beams (28) and (30) and a seat pan (42) is disposed above the support sheet (40) for supporting an occupant.

Abstract: An adjustable device to support a seat on a machine or vehicle that is laterally pivotal about an axis parallel to the longitudinal axis of the machine to permit the seat to accommodate uneven terrain. At the will of the operator, this device can be adjusted to a horizontal position, thereby providing comfort and safely when operating a machine on uneven terrain. The device is to provide an improved seat mounting wherein the seat swings from a common point and movement thereof is controlled by an electromechanical linear actuator, activated by a double throw-double pole switch, (voltage determined by equipment manufacturer), located within easy access of operator. Another important object resides in providing a way to secure seat in a fixed horizontal to seat mounting in the event of malfunction or power failure. Spare clevis pins, provided with hair pin clips, could be inserted in pre-drilled holes which will secure seat and movable framework to base assembly 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 seat height adjustment system particularly adapted for use with vehicle seats and which permits the elevation of one side of the seat base to be adjusted relative to the elevation of an opposite side of that base. The system employs spring assemblies to provide an upwardly directed bias on the seat base which urges that base towards a position of maximum elevation. An actuator is operable to effect downward adjustment of the seat base elevation by imposing a force on the seat base which acts counter to the bias force. Actuator may include two electric motors each of which is connected to a respective two corners of the seat base through flexible drive cables. The arrangement is such that the seat base corners controlled by a respective one of the motors move up or down according to whether the motor is operated in a forward or a reverse mode respectively.

Abstract: A power operated lift recliner which includes a safety system which senses the presence of an object located between a raised chair and the base frame and deactivates the power lift mechanism to prevent the mechanism from lowering the chair toward the base onto the object located therebetween.

Abstract: The chair is constructed with a seat frame which is pivotally mounted at a forward end on a support frame. The rear of the seat frame is interconnected by a linkage to the support frame. The linkage includes a transverse bar which is manually movable to rest against the support legs of the support frame with the seat frame in an upright position or a reclined position.

Abstract: A self-leveling seat is provided including a vehicle having a seat with a horizontally oriented seat portion and a planar floor board. A tubular mounting frame includes a lower horizontal portion having a hollow cylindrical configuration. A pair of mounting brackets encompass the lower horizontal portion and are fixed to the floor board of the vehicle. A pair of upper vertical portions are each equipped with a hollow cylindrical configuration and have a bottom end connected to an associated end of the horizontal portion of the frame. The vertical portions extend upwardly therefrom to terminate at open top ends. The vertical portions are each in fluidic communication with the corresponding end of the horizontal portion. A pair of cylinders are each slidably situated within the top end of a corresponding one of the vertical portions of the frame and have a bottom end and a top end. The top end is coupled to a bottom surface of the seat portion of the seat.

Abstract: A rear seat apparatus for a vehicle is disposed on a rear elevated portion of a stepped floor of the vehicle. At least a rear seat cushion of the rear seat apparatus is allowed to swing toward the front of the vehicle from a horizontal seating state, in which a passenger may sit on the rear seat cushion. The rear seat apparatus has a connection mechanism for connecting the rear seat cushion to the rear elevated portion of the floor. The connection mechanism allows the rear seat cushion to be moved by approximately 90 degrees toward the front of the vehicle and then slid downward so as to be brought into an upright state, in which a front portion of the rear seat cushion is held on a front lower-level portion of the floor. The connection mechanism also allows the rear seat cushion to be moved by approximately 180 degrees from the seating state toward the front of the vehicle so as to be brought into an overturned state.

Abstract: A reclining chair having a back rest member which may be reclined. In one embodiment the reclining chair has means to allow it to be tilted. A pivotable joint is provided along the upper support members of the chair which allow such members to be pivotably bent proximate their midsection thereby allowing a greater degree of tilt of the seat member situate thereon than would otherwise be the case if there was no pivotable joint and the upper support members and the seat member thereon were tilted by simply lowering one end thereof. In another aspect, a lower leg support member is provided which rotatably extends upon the back rest of the chair being reclined, so as to support the calves of a user of the chair in a substantially horizontal position when the chair back is likewise reclined to a substantially horizontal position.

Abstract: A wheeled reclining chair is provided which includes an improved swing link assembly for permitting the seat back assembly to recline approximately 180.degree. relative to the seat assembly to provide a substantially flat occupant-supporting surface such that the seat back provides a rearwardly extending cantilevered surface and the leg rest assembly provides a forwardly extending cantilevered surface from the chair frame assembly. The swing linkage assembly includes a pair of front slide assemblies and a pair of rear swing linkage mechanisms which suspend and operably couple the seat assembly to the chair frame for providing the desired reclining motion. A mobile base assembly having front and rear wheels which can be removed from the base assembly is also provided. The wheeled reclining chair includes a tilt linkage mechanism for tilting the chair frame relative to the mobile base assembly.

Abstract: A seat lifter comprises a lifter shaft having a sector gear and rotated by a center gear to vertically move a seat frame with respect to a base frame through a link mechanism. The sector gear is formed with a stopper arm protruding from one side thereof, whereas the base frame is formed with a long arc-shaped hole with which a pointed end of the stopper arm is engaged. The long arc-shaped hole is partly covered by a vertical wall of the second frame.

Abstract: The invention relates to a sitting device with a seating surface and a seat support supporting said sitting surface, the seat support being connected on the floor side with an elastically deformable support member for the tiltable mounting of the sitting surface.

Abstract: A seat for a vehicle with a scissor-like pivoting system and device for the adjustment of the inclination and/or height of the surface of the seat includes the feature that the device for the adjustment of the inclination and/or height must be space-saving and is not permitted to influence the pivoting system. Scissor-type sets of arms are proposed for the pivoting system whose upper arm-components are angularly adjustable and capable of being fixed relative to the remaining lower components of the same arm.

Abstract: A chair with a moveable seat panel mounted springingly on a support and a back-rest has a seat panel made from pliant panel material which is guided down around the front edge of the seat panel in a U-shape and then rigidly sandwiched in the support. A guide bar which is pivotably mounted on the support is directed backwards and is rigidly connected with the underside of the rear end portion of the seat panel.

Abstract: A chair including a power-assisted linear actuation drive mechanism having a cam guide which is linearly movable upon retraction of a shaft for selectively actuating a lift and tilt linkage mechanism, and for causing forward lifting and tilting movement of the chair when a motor of the mechanism is operated in a first direction. Extension of a shaft in a second opposite direction acts to lower the chair to a normal seating position. Continued extension in the second direction causes a first cam block pivotably mounted to the cam guide to engage a first follower assembly for causing extension of a leg rest assembly. Further extension in the second direction causes a second cam block pivotably mounted to the cam guide to engage a second follower assembly for causing reclining movement of the chair. This sequential operation of the leg rest assembly and the reclining linkage are independent and may be easily disabled to selectively eliminate either of the features.

Abstract: The present apparatus comprises a manually adjustable tilt control mechanism which permits adjustable control of the front to back tilt of a chair assembly on a support frame, including a chair assembly having a lowermost seat portion, a column and forwardly extending support arm, for supporting the chair seat portion, a pair of dissimilarly sized resilient blocks, disposed between the end of the support arm and the bottom side of the chair seat portion. The resilient blocks may be adjustably compressed or decompressed between the bottom of the seat portion and the support arm, to adjust the tiltability of the seat.

Abstract: A narrow seating device or chair including a support caddy having lockable ground engaging caster wheels and a seat portion for a patient undergoing a medical test. The seat portion is mounted on the support caddy and tiltable to a plurality of tilt positions. The seat portion has a convexly curved surface which rests on spaced apart rollers on the upper side of the support caddy to enable tilting. A linear actuator having a first end attached to the support caddy and a second end connected to the seat portion provides for tiltable movement of the seat relative to the support.

Abstract: A seat adjustment mechanism principally for vehicle seats comprises a frame connected to a base by front and rear linkages. A mechanism is provided that is operated by a handle with a first movement of the handle unlocking the front linkages to allow the tilt of the frame to be adjusted relative to the base and continued movement of the handle unlocking both linkages to allow the height of the frame to be adjusted relative to the base. This is achieved by successively pivoting lever arms that successively unlock the pairs of links.

Abstract: A seat-like apparatus having a cradling surface capable of supporting and cradling an infant at an angle of 30.degree., an angle greater than 30.degree., and an angle less than 30.degree. for facilitating feeding, washing, seating, and sleeping. The angle of support is adjusted using rear adjustable legs. By adjusting a crotch support on the cradling surface, infants of different heights can be accommodated. In addition, adjustable length straps are provided for securing the infant on the cradling surface, as well as suction cups attached to the feet of the seat-like apparatus for non-permanently securing the apparatus to objects such as a bathtub or tabletop.

Abstract: A seat arrangement of a forklift truck includes a hood for covering an engine, a seat mounted on the hood, a seat slide mechanism and a supporting member. A seat cushion of the seat is pivotally secured at its front end portion to an upper rail of the seat slide mechanism. The supporting member has a first end which is pivotally secured to an upper surface of the hood and a second end which is engageable with an engaging portion of the seat. When it is necessary to open the hood, the seat positioned at a certain position in a fore-and-aft direction is swung forwardly, then the second end of the supporting member is brought into engagement with the engaging portion of the seat to keep the seat at a certain angle defined between a bottom surface of the seat cushion and the upper surface of the hood, and then the hood is opened.

Abstract: A chair includes a multi-position seat and a frame assembly for supporting the seat in a selected position above a floor underlying the seat. The seat includes a seat bottom and a seat back positioned to lie adjacent to the seat bottom. The seat back is formed to include a guide channel receiving a portion of the frame assembly therein. The frame assembly includes a pedestal and a frame coupled to the pedestal and arranged to pass through, slide in, and pivot in the guide channel formed in the seat back. The frame assembly further includes at least one seat support link and a latch assembly. Each seat support link has one end pivotally coupled to the frame and another end pivotally coupled to the seat to allow the seat to be moved relative to the frame by a caregiver between selected positions.

Abstract: A sprung seat frame comprises a base element, a top element and a spring arrangement between the base and top elements. The spring arrangement has at least two leaf springs which are arranged one above the other at a spacing from each other and at least approximately parallel to each other. One end portion of each leaf spring is connected to the base element and the second end portion of each leaf spring is connected to the top element. The leaf springs are disposed obliquely inclinedly between the base and top elements. At least one corrector leaf spring which is oriented at least approximately parallel to the leaf springs and which is shorter than same is additionally operatively disposed between the base and top elements for optimizing the springing characteristic of the seat frame.

Abstract: The chair disclosed includes a power-assisted linear actuation drive mechanism having a lead screw nut which is linearly movable upon rotation of a power screw for selectively actuating the lift and tilt linkage mechanism for causing forward lifting and tilting movement of the chair when the motor is operated in a first direction. Rotation of the screw shaft in a second opposite direction acts to lower the chair to the normal seating position. Continued rotation in the second direction causes a first cam block pivotably mounted to the lead screw nut to engage a first follower assembly for causing extension of the leg rest assembly. Further rotation in the second direction causes a second cam block pivotably mounted to the lead screw nut to engage a second follower assembly for causing reclining movement of the chair. This sequential operation of the leg rest assembly and the reclining linkage are independent and may be easily disabled to selectively eliminate either of the features.

Abstract: The chair of the present disclosure includes a power-assisted linear actuation drive mechanism having a lead screw nut which is linearly movable upon rotation of a power screw for selectively actuating the lift and tilt linkage mechanism for causing forward lifting and tilting movement of the chair when the motor is operated in a first direction. Rotation of the screw shaft in a second opposite direction acts to lower the chair to the normal seating position. Continued rotation in the second direction causes a first cam block pivotably mounted to the lead screw nut to engage a first follower assembly for causing extension of the leg rest assembly. Further rotation in the second direction causes a second cam block pivotably mounted to the lead screw nut to engage a second follower assembly for causing reclining movement of the chair. This sequential operation of the leg rest assembly and the reclining linkage are independent and may be easily disabled to selectively eliminate either of the features.

Abstract: Adjustment device for tiltable sitting furniture with a stand (1) and a seat board (9) pivoting at the front side of the stand, as well as a driving device (16) arranged to convey the seat board (9) its tilt motion, where the seat board (9) at the front is pivotally arranged at the front edge of a fork (7) articulatedly suspended via arms (5) at the front part of the stand, which fork is in rear the part of the stand and at the rear is guided slidably against a slide rail (10), and the driving device (16) of which via a pressure arm (12) pivotally arranged at the stand transfers motion to the seat board, in addition to the pressure arm (12) is pivotally connected a control bar (19) between its pivot point and its end with the seat board, which control bar during work of the driving device (16) with its front part first is brought to bearing on a position adjustable backing roller (21) connected to the arms (5) of the fork (7) and subsequently with its rear part (23) in different positions adjustable against a

Abstract: A power-assisted chair is disclosed having a linear actuation drive mechanism. A cam member is linearly moveable upon rotation of a power screw for selectively actuating a lift and tilt mechanism for causing forward lifting and tilting movement of the chair when the motor is operated in a first direction. Rotation of the screw shaft in a second opposite direction acts to lower the chair to the normal seating position. Continued rotation in the second direction causes sequential operative extension of a leg rest assembly followed by angular reclining movement of the chair. This sequential operation of the leg rest assembly and the reclining linkage are independent and may be easily disabled to selectively eliminate either of the features. In addition, an adjustment mechanism is provided for permitting the extended position of the leg rest assembly to be easily and simply adjusted.