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:
Feb. 24, 2004
Filed:
Apr. 25, 2002
Applicant:
Inventors:
Robert S. Study, Arlington Heights, IL (US);
Terence E. Crimmins, Westford, MA (US);
Assignee:
The Chamberlain Group, Inc., Elmhurst, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 1/00 ;
U.S. Cl.
CPC ...
H02P 1/00 ;
Abstract
A movable barrier operator ( ) receives movement sensing signals from a sensor ( ) and calculates corresponding speed of movement of a movable barrier. Such speed measurements lead to development of a median speed value over a monitoring window. The median speed value is used in a subsequent monitoring window to facilitate determining when speed of movement for the movable barrier has slowed in a way that likely corresponds to the movable barrier having encountered an obstacle.