Patent ID: 8303265

Claim:
An axial piston hydraulic pump, comprising at least one piston, coupled by a transmission to a drive mechanism and slidable with a reciprocating motion inside a cylinder, the cylinder communicating with a fluid intake passage and a fluid delivery passage, a one-way valve in each of said passages controlling the flow of the fluid therethrough, the delivery passage communicating with a delivery manifold positioned downstream of the one-way valve of the delivery passage, wherein the delivery manifold communicates with a constricted flow member which permits a fluid flow therethrough during operation of the pump at a flow rate which is very small relative to the operating pressure of the pump, the constricted flow member communicating at all times with a discharge aperture connected to atmosphere, wherein when the pump is shut off, continuation of the flow through the constricted flow member will cause the pressure in the pump to be rapidly reduced.