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:
Nov. 22, 1983
Filed:
Nov. 03, 1981
Hans D Reinartz, Frankfurt am Main, DE;
ITT Industries, Inc., New York, NY (US);
Abstract
In a pressure control valve for a hydraulic brake system for vehicles, the closure member is carried by a control piston which has one of its ends guided through an annular seal and in a housing bore, which is preferably connected to atmosphere, and carries adjacent its other end a support plate for engagement with a valve spring. The valve seat is part of an annular body encircling the control piston and held in place by a tubular body surrounding the annular body and the control piston and secured to the housing. A return channel is formed between the annular body and the tubular body and incorporates therein a check valve opening in the direction from the outlet chamber to the inlet chamber. The annular seal is in abutment with a step in the housing and the annular body is in abutment with an inner flange of the tubular body. To obtain a minimum possible overall axial length, the annular body and the annular seal are arranged adjacent each other, leaving a clearance for radial channels. An elastic profile ring serves both as a valve seat and as a closure member of the check valve. The profile ring may be formed separate from or integral with the annular seal.