Abstract: A swing includes two seat units swingably connected to an upright support frame through suspending members. Each seat unit includes a seat frame disposed between inner and outer armrest frames, and a backrest frame pivoted to the seat frame and rear legs of the armrest frames. Inner and outer rod members are secured to the seat frame. An inner screw rod is rotatably mounted on the inner armrest frame, and is operably associated with the inner rod member. An outer screw rod is rotatably mounted on the outer armrest frame, and is associated with the outer rod member in such a manner that tightening of the outer screw rod prevents movement of the seat frame relative to the armrest frames.

Abstract: A forward end part of an arm part (53) of a seatback frame is connected to a forward end part of a main frame (3) such that the forward end part of said arm part (53) can turn about a horizontal axis (61) extending leftward and rightward. A cam hole (71) is formed in a forward end part of the arm part (53). A shaft part (72) movably engageable with the cam hole (71) through a roller (73) is disposed at a forward end part of a seat frame (41). The cam hole (71), the shaft part (72) and the roller (73) constitute a positive motion mechanism (70) for causing a seat frame (41) to be tilted in accordance with the turning motion of the arm part (53).

Abstract: A chair having an adjustable resilient back recliner mechanism, a pair of adjustable armrests, modular upper back portions and an adjustable lumbar support. The chair includes a tension control that adjusts the tension in the recliner mechanism. The tension control is cam-operated to permit adjustment throughout the entire range of adjustability with only limited rotational movement of a control knob. The chair includes a recline limit control that adjusts the limit of rearward movement in the recliner mechanism. The limit control includes a cable operated stop that interact with a stepped trackway on the seat. The chair further includes a height control for adjusting the seat height including a push-button located in the tension control knob. The armrests include height and angle adjustment mechanisms. The lumbar support includes a lumbar cam that is rotatably mounted to a lumbar pad.

Abstract: A synchrotilt chair mechanism and a chair are provided. The synchrotilt chair mechanism is for use on a chair that has a base assembly with an extending pedestal, a seat and a back. The mechanism includes a chassis that is coupled to the pedestal and a seat plate that is coupled to the chassis and to the chair seat. The seat plate can slide relative to the chassis. The mechanism further includes a back support bar that is coupled on one end to the chassis. The support bar extends upwardly from the chassis. A pair of arm supports are further included that can be coupled to the chair. Each arm support extends upwardly adjacent one side of the chair seat. The mechanism further includes a back bracket having a pair of ends that extend adjacent a side of the chair. Each end is pivotally coupled to the adjacent arm support. The back bracket further includes a guide plate that mounts to the chair back and that has at least one guide slot.

Abstract: An ergonomic chair includes a four-bar linkage arrangement wherein a lower frame member is provided with a rigid front support and a rigid rear support with a seat member pivotably connected to the front support. A back rest has an upper support pivotably connected at an upper end of the rear support of the lower frame member. A link member pivotably connects at a first end to a rear support of the seat member and at second end to a lower support of the back rest. This novel arrangement permits tilting movement of the backrest rearwardly relative to the lower frame member causing elevation of a rear portion of the seat member, permitting the feet to remain on the floor and alleviating pressure on the user's thighs, while rotation occurs closely coincident with the pivot axis of the user's hips and while maintaining a generally uniform gaze line.

Abstract: A chair includes a seat base, a seat slidably mounted on the seat base, a backrest disposed rearwardly of the seat base, a footrest disposed frontwardly of the seat base, a front linkage unit interconnecting the footrest to the seat base, and a rear linkage unit interconnecting the backrest to the seat base. An operating lever is mounted on the seat base, is associated with the front and rear linkage units, and is operable to move between a locking position, in which, the seat is prevented from movement relative to the seat base by virtue of the body weight of a user, and an unlocking position, in which, the seat is movable relative to the seat base by virtue of the body weight of the user.

Abstract: Chairs employed in economy-class aircraft seating often incline by rotation of the back about a fixed point, usually the rear edge of the fixed seat. While increasing the comfort of one passenger, this form of seat inclination reduces the space available for the passenger seated in the aft seat. A chair with improved cradle motion, particularly for use in aircraft, is described in which inclination may occur with little or no reduction in the space available to surrounding passengers. Inclination is achieved by the contemporaneous forward sliding of the back portion and the seat portion of the chair relative to the fixed seat frame.

Abstract: The invention concerns a seat (1) with at least one seat base part (2) and at least one backrest part (3) which seat is supported on a seat carrier (4) and is movable in relation to said carrier by positioning drive (5, 6). Considering one of possibly multiple seats (1) it is of advantage, that the positioning drive (5, 6), is in controlling connection with at least one body position sensor (12, 13) to enable the advancing or retracting of a seat base part (2) and/or a backrest part (3) in accord with the bodily position assumed by a person on said seat (1), or, for the retraction of the seat base part (2) and or backrest part (3) in accord with a bodily movement of a person on the seat (1).

Abstract: A reclining chair comprises a telescopic tube assembly connected to a seat for adjusting the inclination of the seat and a backrest, and a lock unit mounted on the telescopic tube assembly for locking releasably an inner tube against an outer tube of the telescopic tube assembly. The lock unit includes a torsion spring which has a coiled portion tightly sleeved around the inner tube to lock it against the outer tube adjacent an opening provided on the outer tube, and two arms extending out of the outer tube through the opening from two ends of the coiled portion. An operating unit is connected to the arms for moving the arms so as to unwind the coiled portion and unlock the inner tube, thereby the seat may be pushed forwardly or rearwardly.

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: A body support system comprises a seat (3) including a base (19) and a seat member (21). The seat member (21) is slidably mounted on the base (19). A back support (7) is pivotable relative to the seat, and a connecting member (25) extends between the back support and the seat member (21) so as to urge the seat member to slide relative to the base (19) towards the back support as the back support is pivoted towards an in-line arrangement with the seat.

Abstract: The invention concerns a chair with improved cradle motion, particularly for aircrafts, said chair providing a back portion (2, 2′), a seat portion (3, 3′), a basic frame (4, 4′), the chair being characterised in that means (5, 6, 7, 8, 9, 12, 13; 5′, 6′, 7′, 8′, 9′, 12′, 13′) are provided for the forward sliding contemporaneously with the forward sliding of the back portion (2, 2′) and of the seat portion (3, 3′).

Abstract: A chair comprising a seat (1(1B)), a seat support (2(2B)) for supporting the seat (1), a rear seat support (3(3B)) extending upwardly rearwardly of the seat support (2(2B)), and a slide mechanism (X1) (moving mechanism (XB)) for sliding the seat (1(1B)) back and forth with respect to the seat support (2 (2B)). Further, a seat (6C) is provided with a fixing mechanism (100C) for fixing it at a desired longitudinal position, and a lever (110C) for operating the fixing mechanism (100C) is installed at a position which allows longitudinal movement thereof together with the seat (6C).

Abstract: A reclining leisure chair includes a main body, a locating member mounted in the rear edge of the main body, and two sliding members mounted in the front edge of the main body. The locating member is formed of a U-shaped frame seat, an action member, a resilient member, an auxiliary piece, a clamping piece, an arresting member, a bolt, and an action rod. The locating member works with ease and without jamming the sliding members.

Abstract: A tiltable chair including a base member (44), a seat (32), a back (34), and a linkage assembly (40) adapted to allow the seat and back to tilt downwardly and rearwardly and to allow pivotal movement of the seat about a pivot axis (52) in substantial alignment with the hip joints of a user. Other aspects of the invention are to provide a vertically adjustable column (42) for supporting the seat of the chair, a support assembly including a frame member (33) having a central opening therethrough and a receptacle formed around the perimeter thereof, a carrier member adapted to fit inside the receptacle, and a membrane of elastic material (210) covering the central opening, and a pair of armrests (36) adapted to be mounted to the chair to allow pivotal movement thereof.

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

Abstract: A motor vehicle seat includes a seat frame which is pivotably coupled to a back rest. A tilt adjustment device has a first hinge portion secured to the back rest and a second hinge portion rigidly connected to the car body for tilting the back rest about a horizontal tilt axis which is located at a height greater than the horizontal pivot connecting the back rest to the seat frame. The forward portion of the seat frame is coupled to the car body such that the height and longitudinal position of the seat frame are adjustable. The horizontal pivot connecting the back rest to the seat frame is also adjustable in height and longitudinal position. In this manner, when the back rest is tilted, the seat portion is moved forward or back so that the hip joint location of the passenger remains substantially unchanged.

Abstract: A vehicle seat (1) has a carrier part (8) connected to a seat back (2), preferably with an integrated headrest (3), and a seat part (4) having a sitting surface. The seat back (2) is movable from a predetermined starting position to a safety position during a crash-related introduction of forces through the user of the seat during a rear collision. For this purpose, the carrier part has a support for the seat back (2) arranged above the sitting surface and spaced with an effective lever arm from the position for the introduction of forces by the pelvis area against in the seat back (2). The seat part (4) is connected to a guide slanting upwardly and forwardly away from the seat back (2), so that during a frontal collision, the seat part is moved from the originally selected starting position into a position of greater safety. The vehicle seat (1) according to the invention offers the user both good ergonomics and at the same time the greatest possible degree of safety.

Abstract: A seat assembly that includes a seat bottom, a seat back, and a pivot mount for pivotally connecting the seat back to the seat bottom. The seat assembly further includes a guide member attaching the pivot mount to the vehicle, a leg link pivotally attaching the seat bottom to the vehicle, and an arm link pivotally attaching to the seat back to the vehicle. The leg link, the arm link, and the guide member all cooperate to guide the pivot mount, and hence the seat bottom and the seat back, in a downward and rearward direction from the in-use position to the stored position. Since the seat bottom moves in a downward direction from the in-use position to the stored position, the seat assembly forms a flat, uniform cargo area for increased cargo capabilities.

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: In a chair having a base, a seat, a backrest, and a tilt control mechanism, a horizontal adjustment mechanism is provided for allowing fore and aft shifting movement of the seat relative to the backrest. The tilt control mechanism typically includes a pair of rails or other mounting structure by which the control mechanism is normally fastened to the seat. The rails present a pair of laterally spaced longitudinally extending edges and a plurality of mounting holes arranged in a predetermined pattern. The horizontal adjustment mechanism includes a seat mounting assembly provided with a pair of laterally spaced guides adapted to engage the edges of the rails to support the seat mounting assembly for sliding movement on the control mechanism.

Abstract: The invention relates to a motor vehicle seat with a back rest and a seat which is supported by an adjustable underframe, which itself is supported via seat carriers of a longitudinal adjustment device. The back rest is supported by a back rest support, which is connected with the back rest via a back rest mounting. The back rest support is joined in a hinge with the seat carriers via front and back brackets of the back rest support and the seat is joined in a hinge with the seat carriers via front and back brackets of the seat support in an adjustable way.

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

Abstract: A tumble forward seat for a van or the like includes a device to automatically unlatch the seat adjuster, return the seat from any forwardly adjusted position to its rearwardmost position, and relatch the seat adjuster, during the forward rotation. A specially designed cam and lift lever push the pivoting release handle of the seat adjuster up and open and hold it open while a wedging surface and pusher block react against one another to shift the seat cushion frame back. The lift lever resets itself as the seat is rotated back. The cam, lift lever, and wedging surface are coordinated to one another so as to always provide the correct degree of opening and shifting motion, regardless of initial seat adjusted position.

Abstract: A seating furniture component with coupled backrest and seat adjustment, having a support chassis (1), a backrest (2) and a seat (3) adjustably attached to the support chassis (1), with the backrest (2) and seat (3) being movably joined to one another in the area of the vertex of the angle between them, the backrest (2) being coupled to a pivot axis (4) on the support chassis (1) at a distance above the vertex of the angle, and the seat (3) being movably attached to the support chassis (1) near the front edge of the seat (3) by a support mechanism (5, 6). The backrest (2) executes a superimposed tiltback and lowering motion from a sitting position into a reclining position, relative to the support chassis (1), while the seat (3) executes a slight superimposed sliding and lifting motion in a synchronized manner.

Abstract: An office-type chair is provided with a base, a seat-back arrangement including a seat assembly which is vertically tiltable relative to the base and a back assembly which is vertically tiltable relative to both the seat assembly and base, and a tilt control mechanism operatively coupled between the base and the seat-back arrangement for permitting the back assembly and seat assembly to be respectively rearwardly and downwardly tilted away from an upright position in a synchronous but differential rate. A front tilt control device is associated with and interconnected with the tilt control mechanism for permitting the seat and back assemblies to be synchronously and nondifferentially tilted forwardly away from the upright position.

Abstract: Integrated seat, back and mechanisms are provided for tilting chairs, and other similar seating. The chair has a base, a seat, a back, a back support and a mechanism which interconnects the seat, back and back support, and imparts a predetermined synchronous movement to the seat and back, i.e. rearward tilting of the seat and simultaneous rearward tilting of the back. The chair back has rotation means for rotatably connecting the chair back to the back support. The rotation is about a rotation axis which passes through the upper body of a person when the person is sitting on the seat and resting against the front of the chair back. The bottom portion of the chair is preferably guided so that the bottom may move along an arc between a first position and a second position which is forward and lower than the first position. The mechanism also has a very large range of movement allowing the user a continuous angular variation from forward inclination to full reclined inclination.

Abstract: A reclining press-back seating unit utilizes modified three-way reclining mechanisms. The three-way mechanism is modified to be free of a footrest, and is mounted within the press-back seating unit so that its links are positioned in the upright position in the same orientation to one another that they would be in the TV position of the three-way reclining unit. The seating unit can be used with virtually any three-way reclining mechanism, including those for wall-avoiding units and high-leg units, to create pressback versions of these units which are particularly suitable for use in multiple seat seating units.

Abstract: A chair includes a base, a seat, a back and a linkage operably connecting the seat and the back to the base in a manner providing a synchrotilt movement of the back and the seat. The back is pivoted to the base at a first actual pivot for movement about a back tilt axis, and the seat is pivoted to the back at a second actual pivot for movement about a second axis that is generally aligned with the hip joints of a user. The seat is further movably and pivotally supported on the base.

Abstract: A vehicle seat, such as an aircraft passenger seat, has a seat back which is reclinable from a normal substantially vertical orientation, and a seat pan which is tiltable between a normal substantially horizontal orientation and a tilted orientation in which its front edge is lower than its rear edge. The seat pan has a rear portion adjacent to the seat back which is substantially horizontal when the main portion of the seat pan is in its tilted orientation.

Abstract: Integrated seat, back and mechanisms are provided for tilting chairs, and other similar seating. The chair has a base, a seat, a back, a back support and a mechanism which interconnects the seat, back and back support, and imparts a predetermined synchronous movement to the seat and back, i.e. rearward tilting of the seat and simultaneous rearward tilting of the back. The chair back has rotation means for rotatably connecting the chair back to the back support. The rotation is about a rotation axis which passes through the upper body of a person when the person is sitting on the seat and resting against the front of the chair back. The bottom portion of the chair is preferably guided so that the bottom may move along an arc between a first position and a second position which is forward and lower than the first position. The mechanism also has a very large range of movement allowing the user a continuous angular variation from forward inclination to full reclined inclination.

Abstract: A dental patient's chair which is fully and completely adjustable which includes a foot control system that eliminates the need to manipulate any hand-operated control knobs or levers. The dental patient's chair includes a linkage assembly which allows the seat to pivot and move in the same manner as the human body when the human body articulates about the complex pivot created at the pelvic bone, the upper legs, and the lower part of the backbone. The dental patient's chair allows the patient's body to remain in the same position relative to the backrest and the seat of the patient's chair as the chair is articulated in a variety of positions.

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

Abstract: A chair, in particular a work or office chair, having a seat that is pivotal toward the front of the seat about a horizontal pivot axis. The seat is variable in inclination and has a backrest that is overproportionately variable in inclination as a function of the change in inclination of the seat. With increasing inclination of the seat, the backrest follows an additional relative motion with respect to a backrest end of the seat. Pivot levers are positioned to support arms of the chair frame on both sides of the seat. The free ends of the pivot levers are fixedly and non-rotatably attached to the backrest for support. The seat is rotatably connected to the pivot levers approximately in its middle region. The desired relative motions between the seat, seat back and chair frame can be accomplished and varied solely by means of the connection between the seat, the backrest, pivot levers which serve as arm supports or armrests, and the chair frame.

Abstract: The invention relates to a load-bearing frame for a chair, in particular for an office chair, which can be adjusted in terms of its height and inclination and comprises a seat carrier (1), a backrest carrier (2), a load-bearing and pivoting device (80) and a standing column (5). By means of struts (46, 32) arranged on the knee side and backrest side and supported on a spindle body, the seat carrier and backrest carrier (1, 2) are mounted on a spindle body such that they can pivot about a horizontal axis (X), oriented transversely to the seat direction, against the restoring force at least of a first spring element (40, 40'), and, in any position, can be fixed, and released again, by a second spring element.

Abstract: A seat body forming a backrest and a seat section is made to move along an arcuate guide with respect to a base by a relative movement guiding mechanism which is formed by combination of an arcuate guide rail and a guide member moving along the guide rail. A seat section is rotatably mounted on the seat body and a coupling member is caused to engage a linear section of the guide rail, thereby maintaining the seat section at a substantially constant inclination regardless of any movement of the seat body. Thus, it is possible to maintain the seat section in a substantially horizontal state also when the angle of the backrest is adjusted, whereby the backrest can recline without interfering with a backrest of the car seat in an automobile. Thus, an uncomfortable position is avoided when a child sits in the safety seat the backrest of which is in an inclined state.

Abstract: An adjustable chair, such as a dental patient chair includes a chair back pivotally connected to a frame and mechanically linked to a travelling seat assembly so that as the chair back is pivoted, the distance between the back and seat assembly increases as the back is moved to an upright orientation and deceases as the back is moved to a reclined orientation. Linkage between the back and seat assembly may include a plate connected to rotate on an axis as the back is pivoted, and eccentrically connected to the travelling seat assembly.

Abstract: A seat support includes a base having a socket for receiving the end of a vertical support post. The base is not tiltable relative to the support post and extends toward the forward edge of a seat. A rearwardly downwardly inclined transverse crank slot is formed in the base adjacent the forward end of the base. Adjacent the post socket, the base includes a transverse slider pivot axis with an upwardly, rearwardly extending crank being connected to the base at the pivot axis. The crank includes a transverse pivot axis and a seat back support is fixed to the crank. Interconnecting the transverse slot of the base and the pivot axis of the crank is a slider. The slider is mounted to the underside of the seat and is pinned through the slot at its forward end. The rear end of the slider is connected to the slider pivot axis of the crank. When the seat is tilted rearwardly, the crank rotates rearwardly about the crank pivot axis and the angle of the. slider, hence the angle of the seat, inclines rearwardly.

Abstract: The vehicle front seat comprises a seat proper (12) mounted on a base (10) by means of two oblique rods (14 and 15) and a back (13) pivotally mounted firstly about an inclination adjusting axis (6) and secondly about an axis (7) for folding the back down forwards, which axis is secured to the base. The bottom axis (4) of the front rod is connected to an axis (5) secured to the base via the short side (16) of a rigid triangle (T), a long rod (20) is pivotally mounted firstly about an axle (8) secured to the triangle and secondly about an axis (9) secured to the back, and a fourth rod (19) interconnects the two hinge axes (6 and 7) of the back.

Abstract: A reclining chair which includes a base, frame supports, and pivotable seat and back supports. The seat and back supports are pivotally connected for correlative movement, and the seat support is operably connected to an inclined ramp which raises the vertical height of the seat support during reclining.

Abstract: A conversion kit for standard wheelchairs whereby a wheelchair with a stationary fixed seat can be retrofitted with a tiltable seat having a reclinable back. The seat and back may be separately infinitely variably adjusted by extendible lockable adjusters and the seat and back apparatus is readily mountable upon conventional wheelchair constructions.

Abstract: A modular reclining/tilt chair and method for assembling it are disclosed. The modular reclining/tilt chair includes a simplified actuation mechanism which significantly reduces system complexity and weight while providing improved comfort to the seat occupant. The construction is such that the pre-assembled actuation mechanism is integrally suspended from and interdependent with box-like modular frame components. In this manner, the frame components can be upholstered prior to final assembly with the actuation mechanism.

Abstract: A vehicle seat, especially a motor vehicle seat, includes an adjustable device which permits adjustment of the seat part, relative to the freely pivotable backrest. The cushion support of the seat part, at least in one position of the cushion support above its lowermost position, can be moved before or at the beginning of a free pivoting motion of the part of the backrest forwards and/or downwards at least in the region of its rear section, and can be moved back into its starting position after or while the backrest pivots back into its starting position.

Abstract: An ergonomic chair has its seat portion (4) which, in addition to be adjustable as to the height, forms a variable tilting angle, positive or negative with respect to the horizontal, in consequence of the height thereof, said tilting angle being obtained through a swinging movement of the seat (4) such as to form an arc of circumference about a rotation center substantially coincident with the center of gravity (CG) of a person sitting on the chair. This swinging movement of the seat is preferably accompanied by the rotation of a lever arm (6) pivotedly mounted at an end (6a) to the stationary portion (1a) of the seat support (1) and hinged at the other end (6b) to the front side of the seat (4), the length of said lever (6) or the pivoting point with seat (4) being adjustable by a simple operation of the user to modify the variation of the tilting angle of the seat (4) in function of its height. Said lever arm (6) may be provided with some elastic feature.

Abstract: A synchronous adjusting device is proposed as a chair mechanism for office chairs, seat furniture or the like, which is constructed extremely simply and with few mechanical components and which, if appropriate, can do without additional force accumulators. At the same time, the restoring movement of the back part will take place as a function of the weight of the user, a restoring moment occurring with the increase in inclination of the backrest. For this, the back part (7) is mounted rotatably relative to the seat part (5) at a distance in height. The leaning force (9) of the user at the back leaning point (10) is counteracted by a restoring force in the lower region of the back part as a result of the articulated connection between the seat part and the back part (7).

Abstract: An adjustable chair seat, of which the angle of the back frame, the seat width, and the seat depth may be adjusted; the arm rest assemblies can also be turned backwards at an angle of 120.degree.; the side frames can also be turned outwards at a horizontal position so as to provide a user with comfortable and convenient operation and use.

Abstract: The present device is a locking mechanism for a piece of seating furniture that is continuously foldable, comprising a cylindrical bushing (3), which is fixed to the frame of the piece of seating furniture and which is provided with a pair of diagonally arranged holes (4) for an upwards inclined carrier bar (6), which is fixed to the seat part, and comprising a locking member (7) jointly operative with the carrier bar (6) as well as a control member (8) acting upon the locking member (7).

Abstract: An adjustable chair which allows the user to select a desired lying position. It has a base of circular shape having a connection assembly to rotatably receive a framework, to which a hinged back and seat portions are secured. The framework has a slidable bar supporting the seat portion, while a pair of arms integrally formed on the framework are pivotedly connected to the back portion. Therefore, as one lying on the chair, by properly manipulating the body weight and adjusting the slidable bar, the chair can be adjusted to a desired inclined angle.

Abstract: The squab of the seat is supported at its front and rear regions and by responsive support arms. The lower ends of the arms are mounted on the free ends of respective pivoted elements whose positions are adjustable selectively so as to enable the seat to be adjusted more precisely to the anthropometric characteristics of its occupant, the whole considerably reducing the vertical bulk of the squab and of the seat as a whole.

Abstract: A chair for an office or the like, having one seat and one back rest which are adjustable especially by body displacement, and having a support (24). The seat has a front seat section (28) and a rear seat section (30) which is connected pivotingly about a first, free-floating seat section about a second pivot axis (32) parallel to the first pivot axis but spaced apart therefrom. The front seat section is on the one hand displaceable by means of at least one supporting element (26) and at least one positive guide (25) along a path established by the positive guide, and on the other hand is suspended on the support for pivoting about a third pivot axis parallel to the first pivot axis but spaced away therefrom.