发明名称 |
Barrier movement operator having obstruction detection |
摘要 |
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.
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申请公布号 |
US7205735(B2) |
申请公布日期 |
2007.04.17 |
申请号 |
US20040760069 |
申请日期 |
2004.01.16 |
申请人 |
THE CHAMBERLAIN GROUP, INC. |
发明人 |
KELLER ROBERT;WILLMOTT COLIN |
分类号 |
H02P3/00;E05F15/00;E05F15/16;H02P1/00;H02P3/20 |
主分类号 |
H02P3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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