Abstract: A chair, especially suited for use by sitters lacking in normal strength which provides a rocking motion without shifting the base of the chair, and which provides support and assistance to the sitter in exiting the chair, is described.

Abstract: In this chair a rounded spring element (128) formed with substantially U-shaped cross-section is provided which comprises parallel legs and with which a seat area (130) and/or a back (142) can be integrated. The spring element consists of plastic and is made single-walled in the curvature region, then dividing in the direction of the seat area and the back into a double-walled form. For reinforcement, ribs (148) may also be provided. At the lower side of the seat area and the double-walled portion of the spring region (128) an integrated socket for a support frame is formed. On the seat area (130) a cushion (174) may be secured with the aid of a stirrup member (136) driven into sockets (140) and comprising wood or steel tube or integral foam. The back consists for example of a cushion support (142) to which a cushion (144) is secured via a stirrup member (146) driven into sockets (152) on the spring region. It is possible to make the spring region (128), seat area ( 130) and back (142) from uniform material.

Abstract: A chair, especially suited for use by sitters lacking in normal strength, provides a lilting motion without shifting the base of the chair, and provides support and assistance to the sitter in exiting the chair. The seat and back of the chair are supported by continuously flexible members, and the back is orthopaedically designed for maintaining spinal support, even as a user of the chair moves with the motion of the chair.

Abstract: A reclining chair having a seat portion connected pivotally at its forward end includes an arm compressible with progressive resistance to support the rear of the seat portion. The compressible arm is arranged to form with the seat portion an angle which continually decreases as the chair is reclined, and continually increases as the chair is returned to its upright position. In one embodiment, the compressible arm travels through a horizontal position so that it may be kept as close as possible to the horizontal at all times.

Abstract: A chair is provided which finds primary, although not exclusive, use as a patient's chair in a hospital room. The chair is formed of both rigid and flexible resilient members, composed respectively, for example, of tubular and flat barstock spring steel, which is configured to form a frame for the chair, and which provides a base, front legs, and support for the seat, back and arm rests of the chair; and a web-like member attached to the frame to constitute the seat and back of the chair. The seat and back are supported on the frame for resilient reciprocal movement. A pair of arm rests are attached to the frame, on either side of the seat. The web-like member, for example, may be formed of polyester mesh. An upholstered cover may be provided which may be attached to the web-like member by strips of Velcro and plastic rivets. The upholstered cover may be formed of vinyl, or other appropriate material, although the patient may sit directly on the web-like material.

Abstract: A reclining article of furniture for sitting, especially an office chair, with the article including a seat portion and a back portion articulated thereto. The seat portion and back portion are respectively connected to an underframe. The seat portion is supported in a forward zone and the back portion is supported by a supporting lever articulated to the underframe and articulated to the back portion at hip level of a user. To obtain a support which is also effective in the zone of the lumbodorsal vertebrae and to provide a close contact of the supporting surfaces with the users body. The contact is uniform in the rest position approximately from a back of the knees up to the shoulder blades. The seat and back merge through an arcuate intermediate section which is flexible so that the arc becomes wider. A connecting line extending between two points of articulation of the supporting lever in a basic position of the chair is inclined at an angle of between 0.degree. and 25.degree. and, preferably, between 15.

Abstract: Improvements for office chairs are described which include a cam control mechanism having two operative positions under control of the occupant. In the first position the cam actuates a first pneumatic cylinder to adjust the height of the seat over a continuous range. In the second position, the cam independently actuates a second pneumatic cylinder for adjusting the postural attitude of the backrest over a continuous range about a pivot located at the sacral level of the occupant. In the postural adjustment mode, the cam may be positioned to actuate the backrest adjusting cylinder continuously so that the backrest provides a floating support or dynamic cushioning to the back of the occupant. The backrest cushion assembly is mounted to its support by means of a pair of laterally spaced cushion mounts which provide lesser resistance and support to body motions in a fore-and-aft plane but greater support to laterally backward motion, as when the occupant is reaching for something.

Abstract: A chair provided with a seat carrier and an associated backrest carrier includes a pneumatic spring connected between the seat carrier and backrest carrier, and a mechanical draw spring one end of which is connected directly to the backrest carrier and the other end of which is connected to an adjustable lever pivotally mounted on the seat carrier. The pneumatic spring and mechanical spring are disposed in side-by-side parallel relation to one another between a pair of generally vertical spaced bars forming a portion of the backrest carrier. The force exerted by the mechanical spring is in opposition to the restoring force exerted by the backrest carrier so that movement of the lever to increase the force exerted by the mechanical spring reduces the total restoring force exerted on the backrest carrier.

Abstract: A chair is disclosed which includes a filled seat portion and a filled back portion joined by a unitary, non-articulated semi-rigid connection integral with the seat portion and the back portion, the connection having a rebate therein, for example in the form of a step, a triangle, an arc, or a continuation thereof.

Abstract: A back for a chair comprises at least one back-supporting frame member, a lower back mounted on the frame member for backward tilting movement about a first horizontal, transverse axis and yieldably restrained against such backward tilting and an upper back mounted on the lower back for tilting movement relative to and independently of the lower back about a second horizontal, transverse axis spaced a substantial distance above the first axis and yieldably restrained against such backward tilting. The axis about which the lower back tilts is located a substantial distance above the seat at a location corresponding to about the middle of the back of an adult human sitting in the chair.