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. 21, 1978
Filed:
Dec. 16, 1976
Claus Bertram, Waltrop, DE;
O & K Orenstein & Koppel Aktiengesellschaft, Berlin, DE;
Abstract
A valve piston for a hydraulic control valve in which the valve piston has piston sections thereon in axially spaced relation interconnected by a reduced diameter portion with at least one piston section having passage means formed on at least one end in diametrally opposite positions and taking the form of a notch formed into the end of the piston and having a concave axially bottom region with a flow body mounted in the notch and defining therewith an arcuate recess forming one end of the passage means and opening radially and axially outwardly near the periphery of the piston section while the other end of the passage means opens axially from the piston at a radially inner region thereof. The flow body and the notch define the passage means and which terminates at the periphery of the piston in a throttling region that directs fluid along an outwardly inclined path toward the respective end of the piston section.