Patent · US Expired

Central locking device for a plurality of closeable openings in the body of a motor vehicle

US4647087A · kind A · utility

1Cited by

4References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Albert Eisele · Achern, DE
Jurgen Hess · Bochum, DE
Erwin Krimmer · Plüderhausen, DE

Key dates

Filing date	Mar 11, 1985
Grant date	Mar 3, 1987
Priority date	—
Expiry date	Mar 11, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T292/0849
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A central locking system for use in a motor vehicle includes a pressure source generating preferably an under pressure and an over pressure. The source is connected to a series of pneumatic control units each including a pressure chamber, a control element arranged in the chamber for movement between two control positions, an opening in the chamber communicating with a space enclosing a valve which normally closes the opening and the space being provided with a discharging nipple which is coupled via the subsequent series connected control units to an indicator device. The indicator device is arranged in the field of view of the car operator. In this manner, the operating condition of locking devices which are outside of view of the operator can be reliably checked.

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