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:
Apr. 14, 1987
Filed:
Nov. 27, 1985
Herbert Ampferer, Bietigheim-Bissingen, DE;
Robert Binder, Schwieberdingen, DE;
Abstract
A pressure relief valve for a lubrication system of an internal combustion engine includes a valve body disposed within a generally cylindrical bore in a housing. The valve body is axially movable within the bore and is provided with a sealing surface on one end. A spring biases the sealing surface against a valve seat in the housing. A guide, which is preferably sleeve-shaped, is non-fixedly arranged within the bore for guiding the axial movement of the valve body and reducing the impact of manufacturing tolerance variations on valve operation. In a preferred embodiment, the sealing surface of the valve body is spherically shaped and the valve seat is conically shaped. A vent passage is provided in the sleeve-shaped guide to equalize pressures within the bore during operation of the valve.