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:
Jun. 04, 2002
Filed:
Aug. 14, 2000
James Fitzgibbon, Batavia, IL (US);
Christopher M. Valente, Elmhurst, IL (US);
Colin B. Willmott, Buffalo Grove, IL (US);
Mark Siegler, Brookfield, IL (US);
Martin Rathgeber, Chicago, IL (US);
Ramon Tam, Chicago, IL (US);
Dan Lobbes, Batavia, IL (US);
The Chamberlain Group, Inc., Elmhurst, IL (US);
Abstract
An operator for opening and closing movable barriers such as garage doors comprising a pass-point limit system which is a component of an operating head. An operator for a rolling shutter or gate can be installed on either side of the opening. A dual pass-point system provides a unique pass-point regardless of direction of mounting the operator, regardless of the direction of travel for opening the barrier, and regardless of installation configuration, eliminating the need for the installer to know which direction the motor is rotating or the barrier is travelling. The operator automatically learns both the open and close limits, regardless of direction of travel and without having to press a learn switch to set the open and close limits