发明名称 |
A BALANCE CONTROL SYSTEM FOR A MOVABLE BARRIER OPERATOR |
摘要 |
A balance control system comprises a motor, a transmission system providing connection between the motor and the door and adapted to move the door between a closed position and an open position located above the closed position, a counterbalance system to reduce power required to lift the door, an apparatus to generate first signal representing a force used to move the door from the closed position to the open position, and to generate a second signal representing a force used to move the door from the open position to the closed position, and a controller responsive to the first signal and to the second signal to indicate an imbalance of the door when a difference between the first signal and the second signal exceeds a predetermined threshold. |
申请公布号 |
CA2756755(A1) |
申请公布日期 |
2003.10.23 |
申请号 |
CA20032756755 |
申请日期 |
2003.04.08 |
申请人 |
THE CHAMBERLAIN GROUP, INC. |
发明人 |
BROOKBANK, THOMAS A.;FITZGIBBON, JAMES J. |
分类号 |
G01M1/14;E05D13/00;E05F15/16;H02K7/14 |
主分类号 |
G01M1/14 |
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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