发明名称 |
ADJUSTABLE FRICTION BLOCK AND TACKLE WINDOW BALANCE SYSTEM |
摘要 |
TITLE ADJUSTABLE FRICTION BLOCK AND TACKLE WINDOW BALANCE SYSTEM A block and tackle window sash balance system 10 has its friction made adjustable by a friction spring 20 and a cam 30 arranged for pressing spring 20 against a radial Pace of a pulley 15 in a high friction position and moving the spring clear of the pulley in a low friction position. Cam 30 is preferably accessible with a screwdriver for adjusting friction after the balance is installed in a window. |
申请公布号 |
CA1278001(C) |
申请公布日期 |
1990.12.18 |
申请号 |
CA19860526241 |
申请日期 |
1986.12.23 |
申请人 |
CALDWELL MANUFACTURING COMPANY |
发明人 |
FLIGHT, ROBERT S. |
分类号 |
E05D15/44;E05F1/00;E06B3/44 |
主分类号 |
E05D15/44 |
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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