Robert Boschgmbh

Joachim Evertz

Andreas Weh

Norbert Alaze

Wolfgang Schuller

Manfred Hauser

Dieter Merklein

Ralf Zitzelsberger

Walter Kremsreiter

Bernd Allenzon

Joerg Zielke

Julius Bayrhof

Michael Hellebrandt

Heinz Siegel

Siegfried Fritsch

Franz Mayer

Tobias Fluck

A piston pump intended especially for use in a slip-controlled hydraulic vehicle brake system. The piston pump is inserted into a cylinder bore, the piston pump has a piston, a bush, and a closure element that tightly closes the cylinder bore. The closure element is joined radially movably to the bush, for instance via caulking. This joint has the advantage that the piston pump can be assembled into a compact, easily manipulated, and sturdy component unit, and that the closure element and the bush are aligned with one another on being inserted into the cylinder bore.

Piston pump for a vehicle brake system having radial play between a closure element and a bush

The invention is directed to a piston pump for a hydraulic vehicle brake system. For simple and inexpensive manufacturability, the piston pump embodies an outlet conduit as a groove in a sleeve bottom and a sealing part. As a result, the sleeve and the sealing part can be manufactured in a non-cutting manner by means of forming. Another advantage of letting the outflow conduit into the sleeve bottom is that the outlet conduit is disposed a small distance in the axial direction from a valve seat of an outlet valve, which counteracts noise production.

Piston pump including an easily produced flow conduit

The invention relates to a piston pump having a piston that is axially displaceable in a bush. In order to keep the piston in the bush in a manner secured against loss, a tubular filter is secured to the bush in the extension thereof; the filter has a smaller inside diameter than the bush and in this way keeps the piston in the bush.

Piston pump

Growing community of inventors

Sonthofen, Germany

Joachim Evertz