发明名称 |
Side mount counterbalance system for upward acting door |
摘要 |
A counterbalance system for an upward acting door includes a cable drum support shaft and a torsion spring drive mechanism mounted adjacent one or both sides of the door and drivably connected to the drum support shaft. The spring drive mechanism includes a torsion coil spring mounted on a frame and connected to a vertically oriented shaft which, in turn, is connected to an output shaft by way of a bevel gear drive. A spring winder device is connected to one end of the spring and to the frame. Indicia on the spring is viewable through a window on the mechanism frame for indicating the number of revolutions imposed on the spring to set a predetermined counterbalance torque.
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申请公布号 |
US7296607(B2) |
申请公布日期 |
2007.11.20 |
申请号 |
US20040974097 |
申请日期 |
2004.10.27 |
申请人 |
OVERHEAD DOOR CORPORATION |
发明人 |
KRUPKE LEROY G.;SUCHICI MARIUS C. |
分类号 |
E05F15/00;E05F15/16 |
主分类号 |
E05F15/00 |
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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