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US 2002/0001525 A1Published application
Radial piston pump
AssigneeZF Batavia, L.L.C.
InventorsMichael Herrmann, Wolfgang Rapp
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AssigneeZF Batavia, L.L.C.
InventorsMichael Herrmann, Wolfgang Rapp
Estimating the term…
The invention is based on a radial piston pump (1) with a pump body (2), in which pump body (2) are placed pistons (4), and cylinders (5) arrayed radial to a cam (14) and the pistons (4) upon an inward thrust suck in fluid by means of suction side intakes (17) and upon an outward thrust, the pistons (4) impel fluid through pressure openings (7) in the outer end walls (6) of the cylinder (5) into a plenum (10). It is proposed, that in the base of the cylinders (4) respectively a connection boring (32) is made to the cam (14), which connection boring (32) is controlled by a relief valve (18). Upon the exceeding of its opening pressure the relief valve (18) opens and pressure peaks in the cylinder (5) can be diminished by means of said connection boring. At the same time, a pressure buffer between the base of the piston (4) and the bearing shell (16) is formed.
A radial piston pump (1) with a pump body (2) in which body (2) pistons (4), and cylinders (5) are placed in radial array to a cam (14) and the pistons (4), upon an inward thrust draw into the cylinders (5) a fluid by means of suction side inlets (17) and upon an outward thrust convey said fluid by means of check valves (9) into plenums (10) through pressure ports (7) in the outer end walls (6) of the cylinders (5), therein characterized, in that in the base of the pistons (4) respectively a connection boring has been made (32) communicating with the cam, which boring (32) is regulated by a pressure relief valve (18).
Dependencies are inferred from the claim text.