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:
May. 24, 1983
Filed:
Mar. 11, 1981
Joseph M Wisniewski, Marne, MI (US);
Haworth, Inc., Holland, MI (US);
Abstract
An adjustable mechanism for use with an office chair, such as a secretarial chair, to allow vertical adjustment of the seat back. The mechanism includes a slide which is mounted on the chair back and is vertically slidably supported on an upright which projects from the seat portion of the chair. The slide has a latching lever pivotally mounted thereon and spring-urged into engagement with one of a series of notches formed along one side of an elongated slot formed in the upright. The notches, together with the latching projection formed on the lever, are defined by upper and lower edge surfaces which are individually generated about a centerpoint which is coincident with the pivot axis of the lever to maintain the chair back securely latched when either upward or downward external forces are imposed thereon.