Abstract: A piston pump for brake systems employs a pulsation-smoothing device that functions especially well in the region of the outlet valve. As a result, substantially less noise occurs, and the durability of the piston pump is substantially better. The piston pump is used essentially in traction-controlled motor vehicle brake systems.

Abstract: In piston pumps for brake systems used until now, there were often noise problems, from pressure pulsations.

Abstract: The invention relates to a piston pump for a hydraulic, slip-controlled vehicle brake system. The piston pump has a piston, which is inserted with a part of its length into a sleeve. A tubular filter that encompasses the piston is attached to the sleeve and constitutes a captive retainer, which secures the piston in a captive fashion in the sleeve. In order to reduce an axial mobility of a sealing ring that seals the piston in the pump housing, the invention proposes attaching the filter, which limits the axial mobility of the sealing ring, to the sleeve in an axially mobile fashion.

Abstract: The invention relates to a piston pump (10) for a hydraulic, slip-controlled vehicle brake system. The piston pump (10) has a piston (20), which is inserted with a part of its length into a sleeve (12). A tubular filter (76) that encompasses the piston (20) is attached to the sleeve (12) and constitutes a captive retainer, which secures the piston (20) in a captive fashion in the sleeve (12). In order to reduce an axial mobility of a sealing ring (14) that seals the piston (20) in the pump housing (16), the invention proposes attaching the filter (76), which limits the axial mobility of the sealing ring (24), to the sleeve (12) in an axially mobile fashion.

Abstract: The invention relates to a piston pump for a slip-controlled hydraulic vehicle brake system. To make a piston of the piston pump easy and inexpensive to manufacture, the invention proposes that the piston be comprised of a sleeve-like shaped part and a valve seat part that is made of plastic and is press-fitted into the shaped part. A high-pressure-side sealing lip is formed onto the valve seat part and is of one piece with it. By means of a tubular support body, a restoring spring is supported on the valve seat part spaced apart from a valve seat of the valve seat part and spaced apart from the sealing lip, which prevents the valve seat and the sealing lip from being impaired by the force of the restoring spring.

Abstract: The invention relates to a piston pump with a piston (10) that is guided so that it can move axially in a pump bore (12) of a pump housing (14). In order to simplify the manufacture of the piston (10), the invention proposes providing the piston (10) with a support ring (64), which is connected to a guide ring (66). By connecting the support ring (64) and guide ring (66), the structural length of the piston pump (10) can be shortened.

Abstract: A piston pump for a slip-controlled hydraulic brake system for a vehicle. A tubular filter is mounted on a bush of the piston pump; the filter has a filter ring that forms a guide ring and is spaced apart from the bush and axially guides the piston by a part of the piston that protrudes from the bush. A separate guide ring is dispensed with, and the structural length of the piston pump can be shortened.

Abstract: A piston pump with a piston that is displaceable in a bush. In order to keep the piston in the bush for retention therein a hollow-cylindrical filter, mounted on the bush, with yielding fingers that engage a groove of the piston keep the piston in the bush until the bush has been inserted into a pump housing.

Abstract: A piston pump for a slip-controlled motor vehicle brake system, with a piston which, by means of a piston restoring spring, is pressed with an end face that constitutes a strike face against a circumference of a cam. The cam is driven to rotate, wherein the cam is used to drive the piston in a reciprocating stroke motion. In order to be able to inexpensively manufacture the piston as an injection molded part made of plastic, the piston is provided with a cam strike piece made of wear resistant material on the strike face which is in contact with the cam.

Abstract: The object is to shorten the installation length of the pump. The high-pressure pump has a pump housing with a bore, in which a pump element having a cylinder, a piston longitudinally movable therein and an outlet valve is received. The cylinder is screwed into the bore and axially fixed at a bore step. The outlet valve has a ball, received in a hollow-cylindrical extension of the cylinder and loaded on its end remote from the valve seat by a leaf spring secured to the cylinder. The hydraulic high-pressure pump is usable in particular in motor vehicle brake systems having an anti-lock and possibly traction control system.