Patent · US Active

Piston pump having a stepped piston

US10385833B2 · kind B2 · utility

1Cited by

2References

3Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Jens Norberg · Marbach am Neckar, DE
Patrick Schellnegger · Ludwigsburg, DE
Andreas Lechler · Mögglingen, DE
Oliver Gaertner · Abstatt, DE

Key dates

Filing date	Sep 9, 2015
Grant date	Aug 20, 2019
Priority date	—
Expiry date	Dec 1, 2035

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04B53/14
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A reciprocating pump, in particular a hydraulic pump of a slip-controlled vehicle braking system, includes a step piston, a differential pressure valve, and a pump outlet. The step piston includes a piston step that delimits a stepped space which is in communication with the pump outlet via the differential pressure valve. The piston step is configured such that the step space undergoes suction and displacement in a direction opposite to a displacement space, and in smaller quantities than suction and displacement in the displacement space, such that brake fluid volume flow in the pump outlet is evened out, and such that pressure pulsations are inhibited.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.