发明名称 |
Parallel Axes Compound Balance |
摘要 |
An apparatus and method to substantially cancel out the opposing torsional forces of the torsion spring of a spiral rod subassembly and the extension spring of a compound spiral rod balance on the carrier element. The extension spring and the rod spiral balance subassembly are parallel, connected at their lower ends to a carrier element and at their top ends either to an upper mounting cap or separately to the wall of the jamb channel. The spiral rod is turned a pre-determined number of times in a direction opposite from that in which the extension spring is turned so that the torsional forces acting on the carrier element from the torsion spring and the extension spring substantially cancel out each other. The balancing out of the counteracting torsional forces eliminates or substantially reduces the friction between the carrier element and the jamb channel.
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申请公布号 |
US2010083464(A1) |
申请公布日期 |
2010.04.08 |
申请号 |
US20090568288 |
申请日期 |
2009.09.28 |
申请人 |
CALDWELL MANUFACTURING COMPANY |
发明人 |
LUCCI ROBERT;KELLUM, III WILBUR JAMES |
分类号 |
E05F7/00 |
主分类号 |
E05F7/00 |
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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