The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 1993
Filed:
Oct. 03, 1991
Yuji Ishi, Osaka, JP;
Toru Nagao, Osaka, JP;
Hironaga Obata, Tokyo, JP;
Yasuo Uematsu, Tokyo, JP;
Tetsuya Kano, Tokyo, JP;
Itoki Co., Ltd., Osaka, JP;
Abstract
There is provided an interlocking supporting mechanism for supporting the seat and seat back of a chair, particularly an office chair. In the supporting mechanism a link system is utilized to interlock the seat with the seat back, so that the chair is capable of smoothly moving as a seated person moves. The front portion of a lever member is pivotally connected to the front portion of a frame member which is supported by a fixing member and which extends toward the front portion of the seat. The lever member is attached, with the aid of horizontal shafts on the right-hand and left-hand sides of the seat, to the lower portions of back supporting bars. A spring member is provided between the frame member and the lever member so that the lever member is rocked on the horizontal shafts. A member for receiving the seat includes a front seat-receiving member and a back seat-receiving member. The front seat-receiving member is provided with the aid of an elastic member so that it can move up and down and right and left, on the front portion of the frame member. The back seat-receiving member is provided, with the aid of shafts parallel with the horizontal shafts, on the back portion of the lever member so that it can rock on these shafts. The seat is supported by the front and back seat-receiving members.