Electricity: motive power systems – Motor-reversing – Periodic- or intermittent-reversing
Reexamination Certificate
2008-03-04
2008-03-04
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Motor-reversing
Periodic- or intermittent-reversing
C318S286000, C318S466000, C318S468000, C318S471000, C318S432000, C318S433000, C049S028000, C049S031000
Reexamination Certificate
active
10971303
ABSTRACT:
A method is provided for use with a movable barrier operator that has no user-initiable dedicated learning mode of operation. At least one parameter is monitored that corresponds to force as applied to a movable barrier to selectively cause the movable barrier to move between at least a first position and a second position. An excess force threshold value is automatically changed in response to the monitored at least one parameter to provide an updated excess force threshold value. Both the updated excess force threshold value and the monitored at least one parameter are used to determine when excess force is being applied to the movable barrier via the movable barrier operator. A predetermined action is taken when excess force is being applied to the movable barrier via the movable barrier operator.
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“Force Regulation.” 2 pp. Berner Torantriebe Oct. 17, 2002. <http://www.bernertorantriebe.de/HomeE/Warum—BernerE/KraftregulierungE/kraftregulierunge.html>.
British Search Report for British patent application GB0400158.2 dated Sep. 2, 2004.
Colon Eduardo
Donovan Lincoln
Fitch Even Tabin & Flannery
The Chamberlain Group, Inc.
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