F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
137/91
F15B 13/00 (2006.01)
Patent
CA 1089741
ABSTRACT OF DISCLOSURE A proportional fluid flow control hydraulic valve including a valve body in which a by-pass flow passage leads from an inlet port to a by-pass outlet port. A generally cylindrical-shaped valve chamber is arranged between the inlet port and a regulated flow outlet port and the by-pass outlet port. The by-pass flow passage includes an annular auxiliary flow channel which extends circumferentially around the valve chamber. A valve member movably mounted in the valve chamber has valve ports therein for controlling fluid flow from the inlet port and the auxiliary fluid flow channel through the valve member to the regulated flow passage. In one form the valve member is normally disposed in balanced hydraulic equilibrium in the valve chamber to prevent fluid flow from the inlet port through the auxiliary fluid flow channel and the valve ports in the valve member into the valve chamber and thence into the regulated flow passage. In another form the valve member is normally disposed in a state of balanced hydraulic equilibrium to establish fluid flow from the auxiliary fluid flow channel through the valve ports in the valve member into the valve chamber and thence into the regulated fluid flow passage. Means are provided, including a manually operable remotely controlled solenoid device, for unbalancing the hydraulic equilibrium of the valve member in the valve chamber to cause movement of the valve member and the valve ports therein into or out of communication with the auxiliary flow channel.
314045
Harms Louis C.
O'toole Raymond R.
Ambac Industries Incorporated
Gowling Lafleur Henderson Llp
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