Barrier movement operator having obstruction detection
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 17, 2007
Grant Date -
Jul 21, 2005
app pub date -
Jan 16, 2004
filing date -
Jan 16, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully