IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0719282
(1985-04-03)
|
우선권정보 |
GB-0021400 (1983-08-09); GB-0027750 (1983-10-17) |
국제출원번호 |
PCT/GB84/00272
(1984-08-08)
|
§371/§102 date |
19850403
(19850403)
|
국제공개번호 |
WO-8500734
(1985-02-28)
|
발명자
/ 주소 |
- Carter David E. (Hemel Hempstead GB2) Bailey Malcolm J. (Newport Pagnell GB2) Willatts Brian A. (Milton Keynes GB2)
|
출원인 / 주소 |
- Pledge Office Chairs Limited (London GB2 03)
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
6 |
초록
▼
A tilting mechanism for a chair includes a stationary support frame member for connection to an upright chair column, a seat frame member for mounting a seat portion of the chair, and a backrest frame member for mounting a backrest portion of the chair. The seat frame member defines a downwardly dir
A tilting mechanism for a chair includes a stationary support frame member for connection to an upright chair column, a seat frame member for mounting a seat portion of the chair, and a backrest frame member for mounting a backrest portion of the chair. The seat frame member defines a downwardly directed channel and respective horizontal pivots between parallel sides of the channel to pivotally mount the seat frame member to the support frame member, and the backrest frame member to the seat frame member, allowing the tilt of the seat and the backrest to be adjusted. The support frame member and the backrest member are connected by links to respective toothed quadrant members pivotally mounted in the channel. Locking levers in the channel are biased normally to lock the quadrants in position, but a control lever with a cam device thereon is operable to release either or both locking levers from the quadrants when adjustment of the tilt of the seat or backrest is required, the cam device lifting one or both locking levers against their bias depending on the position of the control lever.
대표청구항
▼
A tilting mechanism for a chair comprising (a) a seat frame member for mounting a seat portion of the chair thereon, said seat frame member defining an inverted channel including a base and parallel side flanges, (b) a backrest frame member for mounting a backrest portion of the chair thereon, a fir
A tilting mechanism for a chair comprising (a) a seat frame member for mounting a seat portion of the chair thereon, said seat frame member defining an inverted channel including a base and parallel side flanges, (b) a backrest frame member for mounting a backrest portion of the chair thereon, a first horizontal axis extending between said parallel side flanges, said backrest frame member being pivotally mounted on said first horizontal axis for movement towards or away from said inverted channel, (c) a support frame member for mounting on a base part of the chair, a second horizontal axis extending between said parallel side flanges, said seat frame member being pivotally mounted on said second horizontal axis for movement about said support frame member, (d) a first quadrant member pivotally mounted between said parallel side flanges for movement in a plane parallel to said side flanges, an upper edge of the first quadrant member, a plurality of recesses in said upper edge of the first quadrant member, a first link means pivotally connected between said backrest frame member and said first quadrant member converting pivotal adjustment movement of the backrest frame member into pivotal movement of the first quadrant member, (e) a second quadrant member pivotally mounted between said parallel side flanges for movement in a plane parallel to an upper edge of the second quadrant member, a plurality of recesses in said upper edge of the second quadrant member, said side flanges, a second link means pivotally connected between said support frame member and said second quadrant member converting pivotal adjustment movement of the seat frame member into pivotal movement of the second quadrant member, (f) two locking levers disposed along the base and between the side flanges of the inverted channel, each locking lever having a free end and being mounted for pivotal movement between the side flanges, the respective free ends of the two locking levers being releasably engageable with recesses of the first and second quadrants respectively thereby to lock each of the quadrants in a selected pivotal position, (g) a control lever mounted on the seat frame member for rotation to a number of set positions, the control lever extending beneath both of said locking levers, a manually operable portion of the control lever, said manually operable portion extending to one side of the seat frame member, cam means on the control lever, the cam means including respective cam portions selectively engageable with the locking levers in said set positions of said control lever, a first set position of the control lever corresponding to one of the locking levers being raised by a cam portion to be out of engagement with said first quadrant, while the second quadrant remains engaged by its locking lever, and a second set position of the control lever corresponding to the other locking lever being raised by the other cam portion to lie out of engagement with the second quadrant, while the first quadrant remains engaged by its locking lever, free pivotal adjustment movement of the backrest frame member with the seat frame member being fixed being possible in said first set position, and free pivotal adjustment movement of the seat frame member with the backrest frame member being fixed being possible in said second set position, both the backrest and seat frame members being lockable in a selected position after adjustment by means of the locking levers and quadrants.
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