The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 1979
Filed:
Nov. 11, 1977
Johann Huber, Munich, DE;
Knorr-Bremse GmbH, Munich, DE;
Abstract
An accelerator device for a three-pressure control valve of an air brake system on a railway vehicle has a control piston one side of which is subjected to air line pressure and the other side to pressure in a control chamber such that when the pressure in the control chamber predominates the control piston opens an accelerator valve between the air line pressure and a valve chamber. A monitor valve is between the valve chamber and a transfer chamber which continuously communicates to the atmosphere through a throttle orifice. A first piston operates the monitor valve and is subjected in the closing direction of the monitor valve to the action of braking pressure against the effect of a spring force. A second piston which is coupled to the first piston is loaded by air-line-pressure acting in the closing direction of the monitor valve against the pressure in a chamber which can be filled with air line pressure through a check valve opening in the direction of flow of the air line pressure and having a throttle orifice therein.