Abstract: The stand-up unit comprises a support a stand-up frame, which is articulated on the support and has a seat carrier carrying a seat, and a backrest carrier carrying a backrest. Furthermore, a first lever parallelogram is provided in order to maintain the backrest upright in any position. The backrest can be displaced by the first lever parallelogram by means of a rod, in order to ensure that no undesirable relative movement occurs between the backrest and the back of the user when getting up or sitting down. A second lever parallelogram controls the movement of the seat when getting up and sitting down to ensure that no relative movement develops between the seat and buttocks of the user. The stand-up unit may be provided with a base to serve as a chair, particularly a therapy chair. The stand-up unit, however, may also serve as a stand-up wheelchair, when connected to an undercarriage. Spring joint elements support the standing up.

Abstract: A chair includes: a backrest with a waist support projecting part; a horizontal forward seat; a backward seat pivotally supported so as to be able to swing downward relative to the forward seat; a leg support pivotally supported at a front end of the forward seat; links for changing a positional relation between the rear end of the backward seat and the lower end of the backrest so that a distance from the waist support projecting part to the backward seat is reduced from a standing posture to a tilted posture as the backrest is tilted backward; and a connection link for connecting the lower end of the backrest and a part of the leg support lower than the upper end of the leg support so as to cause the leg support to swing forward as the backrest is tilted backward.

Abstract: A chair includes a support frame, and a seat connected to the support frame. The seat is configured to support a user and move with respect to the support frame. The chair includes a back portion connected to the seat. The back portion is configured to move with respect to the seat. The chair includes a foot rest connected to the seat. The foot rest is configured to move with respect to the seat. The chair includes a lower strut connected between the back portion and the foot rest. The lower strut is configured to move with respect to the back portion. The lower strut is configured to move with respect to the seat.

Abstract: A seating unit that includes a linkage mechanism adapted to adjust between closed, extended, and reclined positions is provided. The linkage mechanism includes a seat-mounting plate mounted to a footrest assembly, a back-mounting link and a rear bellcrank both rotatably coupled to the seat-mounting plate, an activator bar that controls a footrest drive link, and a linear actuator for carrying out automated adjustment of the linkage assembly. In operation, a stroke in a first phase of the linear actuator generates a torque on the activator bar. The footrest drive link converts the torque into a laterally-directed force that pushes the footrest assembly into the extended position. A stroke in the second phase acts to push the activator bar forward and translate the seat-mounting plate forward at a consistent inclination angle. The forward translation causes the rear bellcrank to rotate, thereby biasing the back-mounting link rearward into the reclined position.

Abstract: A multifunction office/fitness chair includes a backrest with an armrest and a seat connected with the backrest through a pivot. The backrest is also connected with a footrest through a footrest connection device. The backrest is able to rotate 90 degrees around the pivot, so that the chair can be switched among an office-chair state for work, a recliner state for exercise and a middle state for rest. A user can use the chair of the invention for work and for exercise in a bedroom or an office without limitations to access to equipment, location and time. Using the chair to exercise three to five minutes per day can help lose weight effectively.

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: A multi-purpose chair/stretcher assembly is disclosed which includes seat, backrest and leg supporting assemblies, the backrest and leg supporting assemblies both being pivotably mounted to the seat assembly. A pair of telescoping linkage assemblies connect the backrest and leg supporting assemblies so that the pivotal movement of one with respect to the other causes both to rotate in the same direction if restricted from telescoping. If this linkage assembly is allowed to telescope, the backrest assembly may be moved independently of the leg supporting assembly. A second linkage assembly connects the leg supporting assembly with the seat assembly. This second linkage assembly, while extendable and contractable, may be locked in a rigid configuration so that the leg supporting assembly may be held in a fixed position with respect to the seat assembly.

Abstract: A seat or chair especially for a flight attendant in an aircraft has a backrest section and a seat section hinged to each other and to a frame in such a way that the backrest section and the seat section can take up different angular positions relative to each other and relative to a vertical frame or to the horizontal. Thus, the chair can be folded to take up several positions including positions in which the seat section takes up lower or higher elevations above the floor. For this purpose the upper end of the back rest section is pivotally guided in a guide mechanism while the lower end of the backrest section is journalled to the rear portion of the seat section at a journal axis which simultaneously forms the journal axis of a support and guide member also hinged to the seat section. The support and guide member is hinged intermediate its ends to the frame through a fixed journal so that the rear edge of the support and guide member can engage a stop in the frame.

Abstract: A multi-purpose patient support and transport apparatus is provided which includes a Trendelenburg mechanism and a novel guard rail assembly. The Trendelenburg mechanism is actuated by turning a handle in one direction. This allows a pneumatic spring connected between the seat and backrest assemblies to be fully contracted, thereby moving the backrest assembly to a Trendelenburg position. When the handle is turned in the opposite direction, the backrest may also be rotated downwardly, but is precluded from moving beyond the reclining position by a stop member which prevents the pneumatic spring shaft from moving entirely within the spring casing. The guard rail is mounted to the frame of the apparatus by a pair of pivot arms extending at an oblique angle with respect to the plane of the rail. This allows the rail to be stored under the frame when in the lowered position.

Abstract: In a seat having a support frame consisting of a seat portion frame and a backrest portion frame, the backrest portion frame is of a generally L-shaped configuration, with a first limb thereof extending under the seat portion frame. The first limb of the L-shape carries a pivot axis means which is disposed slidably in a pair of rails fixed at the underside of the seat portion frame while the first limb of the L-shaped backrest portion frame is further guided in a second pair of rails at another position spaced from the first pair of rails in such a way that upon forward movement of the seat portion frame the upper end of the backrest portion frame moves in the opposite direction and also moves downwardly, thereby increasing the angle of inclination of the backrest portion, and vice-versa.

Abstract: This invention relates to a foldable armchair incorporating adjustable backrest and footrest, in which the connecting elements which control orientation of the footrest are connected to the backrest by pivoting crank pins provided with bearing faces cooperating with stops on said backrest, so as to make a unidirectional angular connection which ensures modification of the orientation of the footrest during any angular modification of the backrest, while allowing the armchair to be completely folded.

Abstract: The chair has a seat or seat portion equipped with a balance and its linkage structure has links fixed in articulated manner to a support arm and to which there is articulated a balance device in parallelogram-like manner. A slide is slidingly guided on the balance device and is connected by means of a thrust rod to an extension arm of the backrest-side link. The slide is also connected to one end of a spring element, the other end of which is supported on the balance device. The linkage structure is supported on the backrest by means of a backrest strut articulated to the slide. The seat and backrest portions of the chair frame can be constructed as a plastic shell with a knee-side bending joint and a further bending joint between the seat portion and the backrest portion.

Abstract: A piece of furniture comprises a stand, a seat and a back support pivotable with respect to the seat as well as an upwardly and downwardly pivotable leg support which is provided with a foot-rest, at least one operating means being arranged to, at pivoting of the back support backwardly from a sitting position, in which the feet of the user are resting on the foot-rest, and a simultaneous pivoting of the leg support upwardly and forwardly, cause such a relative movement between the foot-rest and the seat that the knee-adjacent leg portions of the user remain in supporting contact with the supporting areas of the piece of furniture. The operating means is also adapted to, at the pivoting of the leg support upwardly and forwardly, cause a movement of the seat in the direction backwardly relative to the stand and thereby relative to the pivot axis of the leg support.

Abstract: A pair of link plates, each pivotally connected at one end to a seat base and each pivotally connected at their other ends to a seat plate and seat supported thereby, constrain the seat plate and seat to a rearward and upward movement, or a downward and forward movement, with respect to the seat base. The plunger, of a hydraulic cylinder pivotally carried by the seat base, is pivotally connected to the seat plate so that when actuated it induces movement of the seat plate to its rearward and upward position. A seat back is pivotally connected to the seat base and to armrests carried by the seat plate so that movement of the seat in the upward and rearward direction moves the seat back to a downward position aligned with the seat. A footrest linkage is connected between the seat back and a footrest connected to the seat so that movement of the seat back into its downward position moves the footrest into an upward position aligned with the seat and seat back.

Abstract: A seat for a baby's push chair, which can be removed from a wheeled support structure of the push chair and used separately if desired. The seat comprises a support surface with two upstanding side panels, an adjustable rake backrest and an adjustable foot rest. The back rest and foot rest are interlinked by a parallelogram linkage which automatically changes the foot rest inclination when the back rest is adjusted. This linkage abuts the foot rest but is not pivotally attached to it thus premitting the foot rest to be folded right up to a collapsed configuration, and also allows a wide range of adjustment of inclination of the foot rest to be effected.

Abstract: A convertible chair which is adjustable between sitting and reclining positions features a support frame, a seat and a backrest in which the seat and backrest are tiltably mounted so that their relative inclinations can be adjusted to define the afore-mentioned sitting and reclining positions and also a series of intermediate positions. The adjustment mechanism is defined by a support element with a curved support surface which forms a support for the seat and which is pivotably mounted to the support frame at a distance from the pivot axis of the seat and a control linkage which extends between the backrest, or an extension thereof, and the support element so that on changing the inclination of the backrest the support element rotates about its pivot mount and adjusts the vertical height of the point of support of the seat.

Abstract: A multi-position, wall avoiding reclining chair assembly having a unitized metal frame construction and featuring an improved linkage for supporting a chair seat for forwardly directed movement relative to a chair supporting base, as the chair assumes an intermediate reclined or TV position. The chair assembly also features an improved mechanism permitting the application of pressure to a back rest to initiate movement of the chair seat and a foot rest relative to the chair supporting base between their upright and reclined positions without producing substantial coincident rearwardly directed reclining movements of the back rest relative to the chair seat. After the chair seat and foot rest are disposed in their reclined positions to define the intermediate reclined or TV position of the chair, the application of pressure to the back rest will effect movement thereof into its reclined position to thereby define the fully reclined position of the chair.

Abstract: An electrically operated wheeled chair for physically handicapped persons comprising a framework with casters, arm rests on the upper side of said framework, a back rest pivoted at a point provided at the upper and rear corner of the framework, an inclined rocking pipe pivoted at a point provided at the upper and front corner of the framework and telescopically receiving a foot pipe and control box mounted movably in back and forth on an upper horizontal part of the framework. As the back rest moves toward a substantially horizontal position, a seat cushion moves upwardly to a level at which arm rests lie. The foot pipe extends as it tilts. The seat cushion moves backwardly as it rises. The control box moves backwardly along the arm rests as the back rest tilts backwardly.

Abstract: A chair, particularly a wheel-chair, having a spring biased tiltable back-rest and two pivotal leg supports including each a foot rest. The length of the leg supports from their pivot axis is automatically extended when the leg supports are swung to their horizontal position. The leg supports are provided with simple adjusting means to enable continuous adjustment of the length of the leg supports and with simple releasable means to lock and release the leg supports respectively in any angular or horizontal position.

Abstract: A reclining chair has a frame and a seat fixedly and immovably secured to the frame. A back is pivotally mounted to the rear of the frame and extends downwardly beneath the seat. A leg rest is pivotally mounted to the front of the frame and includes an inwardly curved portion at the top thereof which extends beneath the seat. The lower part of the back is connected to the curved portion of the leg rest through a link member such that movement of either the back or the leg rest imparts movement to the other. The connections between the link member, the back, the leg rest and the frame are such as to provide an over-center safety lock which prevents the chair from being accidentially moved from its upright position into its reclining position. Built-in stop mechanisms in the link connection limit the full upright and full reclining positions of the chair.

Abstract: The elevation of a chair seat from normal to raised bed level by cam action between the chair seat and a wheeled frame on which the chair seat is guided for up and down movement. A camshaft journaled on the underside of the chair seat with cam wheels at each end with cam edges supported on rollers journaled on the frame and lever means on the cam shaft connected to the backrest of the chair seat for rocking the cam shaft upon adjustment of the backrest between its condition of a backrest relative to the chair seat and a condition level with the chair seat as a part of the bed pad when the chair seat is raised to bed level.

Abstract: The dental chair is provided which has pivotally connected back, seat and footrest sections, the seatrest being journaled in turn to a base member. A motor carried by the seat and connected to the backrest provides for articulation of the backrest relative to the seat. A link extending between the back and footrest provides for articulation of the footrest relative to seat and a cam connected between the link and seat provides for articulation of the seat about the base member; all movements being accomplished simultaneously upon operation of the motor.

Abstract: A dental chair which comprises a seat, a back inclinable relative to said seat, first means for effecting inclination of said back, second means for pushing the front portion of said seat upward, and third means operable in response to overinclination of said back beyond the normal inclination thereof to drive said second means so as to raise the front portion of said seat relative to the rear portion thereof.