发明授权
- 专利标题： Pulley for double hung windows
- 专利标题（中）： 皮带轮为双吊窗
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申请号： US09925364申请日： 2001-08-09
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公开(公告)号： US06701670B2公开(公告)日： 2004-03-09
- 发明人: Gary Evans
- 申请人： Gary Evans
- 优先权： AUPQ9332 20001008
- 主分类号： E05C706
- IPC分类号： E05C706
摘要：
A pulley apparatus (27) is disclosed which is adapted for use with a double hung wind. (10). The apparatus is used in pairs which are mounted in a recess (30) formed in the head (20) of the double hunt window. A pair of sash cords (25) are routed through the apparatuses and are attached to each sash so as to counterbalance one to the other, without the use of springs or extra weights.
公开/授权文献
- US20020040553A1 Pulley for double hung windows 公开/授权日：2002-04-11
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