Patent · US Expired

Power brake for motor vehicles

US6227099A · kind A · utility

9Cited by

3References

6Claims

0Family size

Assignee

ITT MANUFACTURING ENTERPRISES LLC · US

Inventors

Manfred Kahrs · Wiesbaden, DE
Alfred Eckert · Mainz, DE
Thomas Berthold · Munich, DE
Michael Vogt · Frankfurt am Main, DE
Christof Klesen · Seeheim-Jugenheim, DE

Key dates

Filing date	Jan 15, 1999
Grant date	May 8, 2001
Priority date	—
Expiry date	Jan 15, 2019

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60T13/72
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A brake power assist unit for motor vehicles, the control valve of which can be electrically actuated by means of an electromagnet which actuates a third sealing seat that allows ventilation of the operating chamber. In order to stabilize the characteristic of the load system formed by the armature of the electromagnet, a sleeve that carries the third sealing seat and the valve body of the control valve by means of constructive modifications of the control valve of the externally actuated brake power assist unit, in particular, during the pressure reduction phase, the invention proposes means that allow a controlled pneumatic pressure compensation between the operating chamber and the vacuum chamber or a reduction in the force to be generated by the electromagnet during the pressure reduction phase, i.e., during the return movement of the third sealing seat from the valve body.

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