发明名称 Freeze buster
摘要 A water freeze prevention device is provided and includes a mechanism that is installed between a water meter and incoming water pipes to drain the water pipes to prevent the water pipes from freezing during severe cold weather conditions.
申请公布号 US5220937(A) 申请公布日期 1993.06.22
申请号 US19910797370 申请日期 1991.11.25
申请人 ROBERTS, DALE W.;SPECTOR, GEORGE 发明人 ROBERTS, DALE W.;SPECTOR, GEORGE
分类号 E03B7/12 主分类号 E03B7/12
代理机构 代理人
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