Sealed dashpot mechanism for delayed closing plumbing valves

Details Sealed dashpot mechanism for delayed closing plumbing valves Sealed dashpot mechanism for delayed closing plumbing valves

1986-01-27

1987-04-21

Michalsky, Gerald A.

Valves and valve actuation

Fluid actuated or retarded

Dashpot or fluid controlled retarder or timer

1374546, 251357, 251360, 251900, F16K 3148

Patent

active

046590595

ABSTRACT:
An improved, delayed closing plumbing valve of the type having a cartridge with hydraulic fluid in a sealed chamber retained between an upper and lower diaphragm positioned about a longitudinally movable valve stem assembly. The chamber has a one-way piston which divides the chamber into an upper and lower section, and there is a restricted fluid flow path between the two sections. A water shut off gasket is at the base of a valve stem and has a removable gasket ring to permit the replacement of the gasket. The valve seat may also be removable for replacement. The lower diaphragm is provided with a sealed chamber to prevent its degradation by particles in the water. The diaphragms at the upper and lower end of the chamber are retained and sealed to the valve stem by retaining rings having a conical upper end which holds the inner part of the diaphragm against the valve stem. The diaphragms preferably permit the turning of the valve stem with respect to the cartridge without damage to the diaphragms.

REFERENCES:
patent: 3612479 (1971-10-01), Smith
patent: 3746036 (1973-07-01), Du Bois et al.
patent: 3933337 (1976-01-01), Morris et al.
patent: 4093177 (1978-06-01), Morris et al.
patent: 4483508 (1984-11-01), Marsh et al.

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