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:
Mar. 18, 2008
Filed:
Apr. 04, 2005
A. Anthony East, East Bend, NC (US);
Darrin Brunk, Lawrence, KS (US);
Yannick Funk, Drummondville, CA;
Normand Savard, Drummondville, CA;
Mathieu Provencal, St. Dares de Brompton, CA;
A. Anthony East, East Bend, NC (US);
Darrin Brunk, Lawrence, KS (US);
Yannick Funk, Drummondville, CA;
Normand Savard, Drummondville, CA;
Mathieu Provencal, St. Dares de Brompton, CA;
Amarr Company, Winston-Salem, NC (US);
Abstract
A garage door cable drum is disclosed for a sectional overhead door of a type having a substantially non-linear lift-weight to lift-height characteristic. The drum includes a generally spiral cable groove having a variable minor radius. The groove minor radius at any intermediate point along the groove is sized to provide a lift-cable moment arm that yields a corresponding cable lift force that is slightly less than an instantaneous lift weight of the garage door at any intermediate door elevation.