发明名称 Fire hydrant
摘要 A hydrant water control system is provided which includes a clutch assembly operated by a control wrench which will eliminate the vandalizing of the hydrant and loss of water pressure by illegal opening of the hydrant. A swing away coupling assembly eliminates cost of replacing a broken solid cast iron coupling presently in use on the main valve rod located between the hydrant barrel and bury.
申请公布号 US4842008(A) 申请公布日期 1989.06.27
申请号 US19880161778 申请日期 1988.02.29
申请人 AVELLI, PHILIP;SPECTOR, GEORGE 发明人 AVELLI, PHILIP;SPECTOR, GEORGE
分类号 E03B9/02 主分类号 E03B9/02
代理机构 代理人
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