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. 14, 2007
Filed:
Dec. 27, 2004
Willis J. Mullet, Gulf Breeze, FL (US);
Gregory M. Rusnak, Milton, FL (US);
John Foreman, Pensacola, FL (US);
Willis J. Mullet, Gulf Breeze, FL (US);
Gregory M. Rusnak, Milton, FL (US);
John Foreman, Pensacola, FL (US);
Wayne-Dalton Corp., Mt. Hope, OH (US);
Abstract
A counterbalance system () for a door (D) movable between a closed position and an open position having an axle (), a cable drum () attached to the axle, a winding shaft () interconnected with the axle by a counterbalance spring (), and a pawl () selectively movable between a first position for adjusting tension in the counterbalance spring and a second position for preventing rotation of the cable drum upon failure of the counterbalance spring, thereby limiting movement of the door toward the closed position.