Patent · US Active

Piston pump unit for a hydraulic vehicle braking system

US11318921B2 · kind B2 · utility

2Cited by

2References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Andreas Weh · Kempten (Allgäu), DE
Matthias Mayr · Rettenberg, DE

Key dates

Filing date	Jul 19, 2018
Grant date	May 3, 2022
Priority date	—
Expiry date	Jul 19, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60T8/368
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A piston pump unit for a hydraulic vehicle power braking system including an electric motor, a planetary gear set, a worm gear, and a piston displaceable in a cylinder. As ventilation of an annular gap between the cylinder and the piston and a back side of the piston, the invention provides a radial hole and grooves in the cylinder.

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