Robert Boschgmbh

Gunter Kersten

Gerhard Nonnenmacher

Walter Robeller

Hans-Jurgen Fricke

Ulrich Aldinger

Emil Knodel

Rainer Knoblauch

The invention relates to an improvement in a radial piston machine having a stationary member, a cylinder body rotatable about the stationary member and having cylinder bores, pistons reciprocable in the cylinder bores, a piston-control ring adjacent the cylinder body, and glide shoes on the pistons and in sliding engagement with the control ring. According to the improvement the member and the pistons are of case-hardened steel, the cylinder body is of alloyed pearlitic cast iron, and the control ring is of steel.

Radial piston machine

In a piston machine of the type having a housing, a reciprocable piston in the housing and provided with an axial end portion and a piston-reciprocating element having a glide surface located opposite and movable with reference to the end portion for effecting the reciprocation of the piston, the invention provides for a glide shoe which is articulately connected to the end portion of the piston and which has a glide face in gliding contact with the glide surface of the piston-reciprocating element. The glide face has a recess which communicates via a passage with a source of pressure fluid, a sealing rim of substantially constant width surrounding the recess, and a plurality of face portions which are located outwardly of the sealing rim and configurated so that hydrodynamic pressure fields develop between the face portions and the respectively juxtaposed surface portions of the glide surface.

Piston machine construction

A multiple pump assembly consisting of a series of two or more coaxial pumps the first of which is invariably a radial piston pump. The shaft of the prime mover drives the first pump by way of an Oldham coupling and an extension of this shaft extends through an axial bore of the pintle in the first pump to drive the rotary element of the second pump as well as any further pump of the assembly. If the second pump is also a radial piston pump, the two pumps may but need not have a common pintle. The slide block of each radial piston pump can be adjusted to change the rate of delivery of pressurized fluid. The fluid admitting and evacuating channels in the pintle or pintles may be formed by an electrochemical process, or the entire pintle may constitute a casting. The housing for the multiple pump assembly may include a discrete annular section for each pump or a single annular section for all of the pumps and cover members at the axial ends of the single section.

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Stuttgart, Germany

Gunter Kersten