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Class Information
Number: 137/285
Name: Fluid handling > Hydrant type > Removable valve with supplemental check valve
Description: Apparatus in which the main valve is arranged to be removable, and a supplemental check valve is provided, biased closed by a spring or by fluid pressure and normally held open by a projection on the main valve or its actuator when the main valve is in place.

Patents under this class:

Patent Number Title Of Patent Date Issued
7249609 Yard hydrant with closure valve check valve Jul. 31, 2007
5404734 Secure locking arrangement Apr. 11, 1995
4127142 Slow close hydrant check valve Nov. 28, 1978
4120314 Remote actuated flush valve Oct. 17, 1978

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