Electricity: motive power systems – Motor-reversing
Reexamination Certificate
2007-04-17
2007-04-17
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Motor-reversing
C318S266000, C318S268000, C318S280000, C318S282000, C318S286000, C318S466000, C318S468000
Reexamination Certificate
active
10760069
ABSTRACT:
A barrier movement operator which uses an A.C. motor to move a barrier is disclosed herein. The operator senses a characteristic of barrier movement, such as motor rotation speed, to detect when the barrier contacts an obstruction. The motor and/or the circuitry for applying electrical power to the motor have been enhanced to improve the detectibility of contact with an obstruction.
REFERENCES:
patent: 4706727 (1987-11-01), Leivenzon et al.
patent: 5222327 (1993-06-01), Fellows et al.
patent: 5334876 (1994-08-01), Washeleski et al.
patent: 5335307 (1994-08-01), Sommer
patent: 5557887 (1996-09-01), Fellows et al.
patent: 6014307 (2000-01-01), Crimmins
patent: 6137255 (2000-10-01), Skalski
patent: 6172475 (2001-01-01), Fitzgibbon et al.
patent: 6326751 (2001-12-01), Mullet et al.
patent: 6952087 (2005-10-01), Lamm
patent: 2005/0012488 (2005-01-01), Fitzgibbon et al.
International Search Report, dated Aug. 27, 2004, in PCT application PCT/US04/01157.
Keller Robert
Willmott Colin
Donovan Lincoln
Fitch Even Tabin & Flannery
Smith Tyrone
The Chamberlain Group, Inc.
LandOfFree
Barrier movement operator having obstruction detection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Barrier movement operator having obstruction detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Barrier movement operator having obstruction detection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3776938