Fluid handling – Line condition change responsive valves – Safety cut-off requiring reset
Patent
1974-08-22
1976-08-31
Wealsley, Harold W.
Fluid handling
Line condition change responsive valves
Safety cut-off requiring reset
137517, F16B 1700
Patent
active
039774309
ABSTRACT:
A ball check valve construction provides for safely controlling flow of compressed fluid under a normal operating pressure through a conduit line to a pressure actuated device. The valve construction includes a valve body formed with a ball check chamber in which is contained a ball normally biased by a spring element into an open position. The valve body is constructed with inlet and outlet pots having respective conduit elements connected thereto. Sudden pressure increase through the valve body resulting from an end of a conduit element becoming accidentally disconnected compresses the ball against the spring into contact with a sealing ring surrounding the spring, thereby to instantly interrupt flow of compressed air and prevent whipping or lashing about of the disconnected end. A reset device is arranged in a side wall part of the valve body to quickly move the ball out of contact with the sealing ring into a recess formed internally of the ball chamber, thereby to allow the spring to return the ball to a normally opened springbiased position. The reset device includes a plunger assembly mounted for transversely reciprocating movement into and out of the ball chamber. The plunger assembly is sealably contained in the side wall of the valve body so as to permit normal operating pressure in the ball check chamber to return the plunger to a retracted position after a reset operation takes place.
REFERENCES:
patent: 1339383 (1920-05-01), Beese
patent: 2929399 (1960-03-01), Magowan
patent: 2931178 (1960-04-01), Straus
patent: 3407827 (1968-10-01), Follett
patent: 3779273 (1973-12-01), Stone
Hamilton Munroe H.
Weakley Harold W.
Wealsley Harold W.
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