Valves and valve actuation – Fluid actuated or retarded – Dashpot or fluid controlled retarder or timer
Patent
1983-06-22
1985-06-04
Scott, Samuel
Valves and valve actuation
Fluid actuated or retarded
Dashpot or fluid controlled retarder or timer
251 52, F16K 3112
Patent
active
045209928
ABSTRACT:
A slow-closing valve mechanism for controlling metered flow of water for a predetermined time interval from a main inlet to a main outlet in which a timing chamber is provided with a valve seat at one end and an inwardly adjacent main flow inlet and a bleeder opening at its opposite end. A reciprocable valve stem extends through the valve seat and carries a main valve that is biased towards the seat by a relatively long low rate coiled spring surrounding the stem, and also carries a piston that is movable in a valve opening direction by a manually operable actuator at the outer end of the stem, and in a timed valve closing direction at a rate determined by a fixed hydraulic flow passage of an elongate capillary tube connected with the bleeder opening, this tube being coiled externally of the timing chamber and having its inlet in communication with the main inlet flow passage. The valve closure timing interval is variable by means of an axially adjustable end cap extension on the outer end of the stem, which is engageable by the manual actuator to effect opening of the main valve a distance as determined by engagement of the end cap extension with a fixed abutment stop.
REFERENCES:
patent: 192642 (1877-07-01), Eckert
patent: 1274195 (1918-07-01), Purnell
patent: 1995792 (1935-03-01), Brown
patent: 2710736 (1955-06-01), Miller
patent: 2991795 (1961-07-01), Fraser et al.
patent: 3038169 (1962-06-01), O'Brien
patent: 3065948 (1962-11-01), Nolan
Adams Rite Products, Inc.
Kamen Noah
Scott Samuel
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