Patent · US Expired

Piston pump

US6514056B1 · kind B1 · utility

8Cited by

0References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Wolfgang Schuller · Cleebronn, DE
Beate Schumann · Brackenheim, DE

Key dates

Filing date	Apr 5, 2001
Grant date	Feb 4, 2003
Priority date	—
Expiry date	Apr 5, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04B19/022
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A piston pump for a slip-controlled, hydraulic brake system of a vehicle. A hollow piston is provided with an inner piston seal that has a sealing lip. During an upward reciprocating motion of the piston, fluid can flow past the sealing lip in a direction of a piston inner (displacement chamber) and constitutes an inlet valve of the piston pump. During a downward movement of the piston the sealing lip is forced by pressure against an inner surface of the piston to prevent a flow of fluid past the sealing lip. The invention obviates the need for a separate inlet valve and makes it possible for the piston pump to be short in length.

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