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. 31, 1993
Filed:
Feb. 24, 1992
Roger W Lhotak, Elburn, IL (US);
The Chamberlain Group, Inc., Elmhurst, IL (US);
Abstract
A canopy garage door opener including a mechanism for interconnecting a horizontal, rectilinear reciprocating carriage drive means to a canopy door having a first axis fixed to the door and movable vertically in a guide means and a pair of crank arms pivoted at the top of a door opening and to a horizontal axis fixed with respect to the door. The mechanism includes a lever pivoted to the carriage forming part of a quadrangular link assembly pivoted to the door at one apex and connected by another link to the door from an adjacent apex. Guard means including fixed and movable plates are disposed on both sides of the mechanism to shield it, the movable plates being pivotally connected to the mechanism and being rotated by a cam and follower connection to the fixed plates.