Fluid flow control

Details Fluid flow control Fluid flow control

G - Physics

05

D

251/14, 137/34

G05D 16/20 (2006.01) F15B 13/043 (2006.01) F16K 31/40 (2006.01)

Patent

CA 1163165

FLUID FLOW CONTROL ABSTRACT OF THE DISCLOSURE A constant displacement pump and an associated flow control mechanism are disclosed. The flow control mechanism includes a variable orifice, i.e., a pintle and valve seat in the outlet from the pump. The pressure drop. across the variable orifice controls the position of a bypass valve. The position of the pintle member relative to the valve seat is controlled by fluid pressure acting on one end of the pintle member. The fluid pressure acting on the one end of the pintle member may be infinitely varied so that the position of be pintle member with respect to the valve seat may be infinitely varied. Fluid pressure acting on the one end of the pintle member is controlled by an electrical solenoid which infinitely positions a pilot member relative to a fluid pressure passage joining the opposite ends of the pintle member.

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