F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
137/43.2
F16K 17/18 (2006.01) F02M 3/06 (2006.01) F02M 25/07 (2006.01) F15C 3/04 (2006.01)
Patent
CA 1153276
079269-MST LOW-DIFFERENTIAL PRESSURE DELAY VALVE Abstract: A low-differential pressure delay valve for vacuum controlled devices is disclosed. The valve has input (26,122), output (20,116) and third (24,120) chambers with the following: a controlled flow orifice (30,126) in a separating plate (18,114) between the input (26,122) and output (20,116) chambers; a port (28,124) in the separating plate; a diaphragm operator (22,118) sealingly positioned between the input (26,122) and third (24,120) chambers; a hollow stem (42,129) with a seal (44,138) on one end which stem communicates the output (20,116) and third chambers (24,120) by extending through the separating plate port (28,124), input (26,122) chamber and the diaphragm (22,118), the stem is connected to and operative by the diaphragm operator; and, a bias spring (46,140) of any pre- determined force to maintain the port (28,124) in a closed position is located in either the input (26) or third (120) chambers. The diaphragm operator (22,118) opens. the port to balance the pressures in the input (26,122) and output (20,116) chambers when the change in input pressure or vacuum is both greater than the bias force of the spring and too sudden for rapid dissipation through the fixed orifice (30,126). At pressure changes less than the bias force of the spring (46,140) or at such a gradual rate as. to dissipate through the orifice (30,126) the valve will operate as a standard delay valve.
377901
Aubel John A.
Bose William H.
Burrows James H.
Borg-Warner Corporation
Macrae & Co.
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