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. 11, 2015
Filed:
Aug. 25, 2014
The Chamberlain Group, Inc., Elmhurst, IL (US);
Brian Roy Skotty, Elmnurst, IL (US);
The Chamberlain Group, Inc., Elmhurst, IL (US);
Abstract
Methods of operating a fluid-based spring counterbalance mechanism for a movable barrier are used to support a portion of the weight of the movable barrier. A jackshaft is configured to be operatively coupled to the movable barrier such that rotation of the jackshaft raises or lowers the movable barrier. The jackshaft is operatively coupled to a rotatable input shaft of the fluid-based spring counterbalance mechanism. The rotatable input shaft is coupled to a flexible-walled fluid-based spring. Applying a first force by a movable barrier operator changes the position of the movable barrier, and the flexible-walled fluid-based spring exerts a second force that supports a portion of the weight of the movable barrier in addition to the first force.