Patent · US Expired

Electro-pneumatic door control apparatus

US4478131A · kind A · utility

7Cited by

8References

1Claims

0Family size

Assignee

Wabco Fahrzeughremsen GmbH · DE

Inventors

Peter Liermann · Barsinghausen, DE
Karl Hesse · Sarstedt, DE
Dietmar Meyer · Barsinghausen, DE
Wolfgang Gudat

Key dates

Filing date	Aug 24, 1981
Grant date	Oct 23, 1984
Priority date	—
Expiry date	Aug 24, 2001

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE05Y2900/531
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

An electro-pneumatic door control apparatus for use on public vehicles and including reversing mechanism for changing the direction of door movement, either automatically or operator-initiated, in the event of an obstruction in the door. The control apparatus further includes a flip-flop for recording the position (either open or closed) of the door at all times, a monitoring logic device for recognizing the position of the flip-flop and what type of monitoring function is permitted, a control logic device for picking up the door command and the signal from the monitoring logic device combing them and transmitting them to a valve solenoid control device for energizing respective solenoids of several valve devices by which the appropriate movement of the doors is effected.

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