发明授权
US4766625A Box spring having rows of coil springs formed from a single length of
wire
失效
箱形弹簧，其具有由单根线材形成的一排螺旋弹簧
- 专利标题： Box spring having rows of coil springs formed from a single length of wire
- 专利标题（中）： 箱形弹簧，其具有由单根线材形成的一排螺旋弹簧
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申请号： US920248申请日： 1986-10-17
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公开(公告)号： US4766625A公开(公告)日： 1988-08-30
- 发明人: Chester R. Yates , Marvin D. Selzer , Henry G. Mohr
- 申请人： Chester R. Yates , Marvin D. Selzer , Henry G. Mohr
- 申请人地址： MO Carthage
- 专利权人： Leggett & Platt, Incorporated
- 当前专利权人： Leggett & Platt, Incorporated
- 当前专利权人地址： MO Carthage
- 主分类号： A47C23/043
- IPC分类号： A47C23/043 ; B21F3/12 ; B21F33/04 ; A47C23/02 ; F16F3/04
摘要：
A box spring comprises a rectangular base frame, a wire grid, and a plurality of parallel rows of coil springs supporting the grid atop the base frame. Each row of coil springs is made from a single continuous length of wire in which adjacent coils are interconnected by an interconnecting segment of the wire. Each interconnecting segment is in the form of a generally diagonally extending bar having substantially parallel end portions interconnected at the center by an offset section, which offset section is formed by rotating the offset section relative to the parallel end portions while the end portions are restrained against rotation.
公开/授权文献
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