发明授权
- 专利标题： Tank transport pressure relief valve assembly
- 专利标题（中）： 油罐运输压力释放阀总成
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申请号： US15006申请日： 1998-01-29
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公开(公告)号： US5855225A公开(公告)日： 1999-01-05
- 发明人: James W. Williams, III
- 申请人： James W. Williams, III
- 专利权人： Williams, Iii; James W.
- 当前专利权人： Williams, Iii; James W.
- 主分类号： F17C13/04
- IPC分类号： F17C13/04 ; F16K15/06 ; F16K17/04 ; F16K15/00
摘要：
A pressure relief valve for releasing fluid through a vent in a railway tank car, tank trucks and similar vessels. A valve disk is normally biased in a closed position by a plurality of constant-force springs of laminated steel tapes on drums supported on upright angle brackets symmetrically arranged around a valve seat. The pressure at which the valve opens is determined by a preselection of the number of springs, laminated tapes per spring, and the restoring force of each tape.
公开/授权文献
- US5438405A Device and method for testing optical elements 公开/授权日：1995-08-01
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