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:
Jan. 01, 1991
Filed:
Oct. 13, 1989
William S Liles, Corpus Christi, TX (US);
Lew V Hewitt, Corpus Christi, TX (US);
David P Hewitt, Corpus Christi, TX (US);
Overhead Door Corporation, Dallas, TX (US);
Abstract
A revolving door assembly in which the individual door wings are releasably secured to a central support member, such that the door wings are retained in respective operative positions in which the wings extend substantially radially from the central hub in diametrically opposed pairs. The door wings are releasable from their operative positions in response to the exertion of a predetermined force thereon to allow one or more of the door wings to be rotated about their respective pivot axes to a folded position. The support member has a plurality of arm members projecting substantially radially therefrom. Each door wing is attached to a corresponding arm member by means of a ball and catch mechanism at a distal position relative to the support member. The ball is disengaged from the catch to allow the door wing to swing free of the arm member when a predetermined force is exerted thereon. An elongated bar is positioned between an inner portion of each door wing and the support member for maintaining each door wing substantially in vertical alignment when the door wing is rotated about its pivot axis. Each door wing is pivotally mounted for rotation about first and second pivot axes, which are spaced apart sufficiently to allow the door wings to be substantially completely 'bookfolded'.