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1. WO1993017604 - AGENCEMENT DE SIEGE

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Claims

1. Arrangement for a chair, preferably of the type that is both adaptable and versatile such as to be suitable for a person with a stiff hip or other handicap, the chair including a seat (1) having two flaps (3, 4) at its front portion, the angular relationship of these flaps to the general plane of the seat being adjustable as desired, characterized in that with the aid of a drive means (6) actuated by an easily accessible control means (5) the respective flap (3; 4) is automatically, infinitely variably adjustable from/to a bottommost, lowered position (A) of the flap (3; 4) forming a negative angle relative to the general plane of the seat (1) , and to/from an uppermost, raised position (B) of the flap (3; 4) forming a positive angle to said seat plane.

2. Arrangement as claimed in claim 1, characterized in that the seat (1) includes a base plate (7) having two flap elements (9, 10) pivotably mounted at the front edge (8) thereof, there also being a seat pad (26) mounted on the base plate and its flap elements (9, 10) via support plates (11-13), said pad having flap-like formations (14, 15) at its front portion (2) , said formations being inseparably formed together with the seat pad (26) to provide an integrated seat.

3. Arrangement as claimed in claim 1 or 2 , characterized in that the drive means (6) comprises a piston (17) reciprocably movable out of, and into a drive cylinder (16) , the outer end (18) of the piston being pivotably attached to a link (19) , which in turn is pivotably attached at its other end to a guide pin (20) rigidly attached to, and projecting downwards from the underside of the respective flap element (9, 10) , said piston being infinitely variably movable to different, selected, fixed positions in its direction of movement via the drive cylinder (16) under actuation of the control means (5) .

4. Arrangement as claimed in claim 3, characterized in that the drive cylinder (16) includes an internal thread for coaction with a mating, complemental thread on the piston (17) , such that on turning the drive cylinder (16) in its supporting bearing blocks (21, 22) relative to the piston (17) , the latter is moved either into, or out from the cylinder (16) while simultaneously affecting the angular attitude of the respective flap element (9; 10) in relation to the base plate (7) .

5. Arrangement as claimed in any one of the preceding claims, characterized in that the control means (5) comprises a thumbwheel (23) mounted for rotation in a holder (24) , and connected to the drive cylinder (16) by a cable or wire (25) for translating the rotational movement of the thumbwheel (23) to the drive cylinder (16).

6. Arrangement as claimed in claim 1, characterized in that the respective flap (3; 4) projects out from the front portion (2) of the seat (1) a distance which is substantially one-third of the total depth of the seat (1) .

AMENDED 0--&IMS
[.received by the -Datemational Bureau on 5 August 1993 (05.08.93); original claims 1-6 replaced by amended claims 1-4 ( 2 pages)]

1. Arrangement for a chair, preferably of the type adapted for a person with a handicap, the chair including a seat (1) having two flaps (3, 4) at its front portion (2), the angular relationship of these flaps to the general plane of the seat being adjustable as desired, with the aid of a drive means (6) actuated by a control means (5) mounted on an edge portion of the chair seat the respective flap (3 ;

4) is variably adjustable from/to a bottommost, lowered position (A) of the flap (3; 4) forming a negative angle relative to the general plane of the seat (1) , and to/from an uppermost, raised position (B) of the flap (3; 4) forming a positive angle to said seat plane, characterized in that the seat (1) includes a base plate (7) having two flap elements (9, 10) pivotably mounted at the front edge (8) thereof, there also being a seat pad (26) mounted on the 'base plate and its flap elements (9, 10) via support plates (11-13), said pad having flap-like formations (14, 15) at its front portion (2) , said formations being inseparably formed together with the seat pad (26) to provide an integrated seat, and said drive means (6) comprises a piston (17) reciprocably movable out of, and into a drive cylinder (16) , the outer end (18) of the piston being pivotably attached to a link (19) , which in turn is pivotably attached at its other end to a guide pin (20) rigidly attached to, and projecting downwards from the underside of the respective flap element (9, 10), said piston being infinitely variably movable to different, selected, fixed positions in its direction of movement via the drive cylinder (16) under actuation of the control means (5) .

2. Arrangement as claimed in claim 1, characterized in that the drive cylinder (16) includes an internal thread for coaction with a mating, complemental thread on the piston (17) , such that on turning the drive cylinder (16) in its supporting bearing blocks (21, 22) relative to the piston (17) , the latter is moved either into, or out from the cylinder (16) while simultaneously affecting the angular attitude of the respective flap element (9; 10) in relation to the base plate (7) .

3. Arrangement as claimed in any one of the preceding claims, characterized in that the control means (5) comprises a thumbwheel (23) mounted for rotation in a holder (24) , and connected to the drive cylinder (16) by a cable or wire (25) for translating the rotational movement of the thumbwheel (23) to the drive cylinder (16) .

4. Arrangement as claimed in claim 1, characterized in that the respective flap (3; 4) projects out from the front portion (2) of the seat (1) a distance which is substantially one-third of the total depth of the seat (1) .