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:
Dec. 15, 2020
Filed:
Jun. 19, 2017
Hydac Fluidtechnik Gmbh, Sulzbach/Saar, DE;
Frank Schulz, Blieskastel-Bierbach, DE;
Peter Bruck, Althornbach, DE;
HYDAC FLUIDTECHNIK GMBH, Sulzbach/Saar, DE;
Abstract
A control piston () is longitudinally displaceable in a housing () having two connection points (P, A) for fluid, and cooperates with a metering edge () of the housing () at a connection point (P). Point (P), in control positions of the control piston (), supplies the connection point (A) with fluid via a fluid connection. The piston, as a result of occurring flow forces, tends to be drawn in the direction of a closing position that blocks one of these fluid connections. To compensate the flow force, the control piston () has, in the region of the control edge () of the housing (), a shape modification () of its cylindrical exterior basic form (), such that a flow contact surface () for fluid is created. The contact surface transfers a compensating force that acts against the flow force to the control piston () and that seeks to pull the control piston () into an opening position opposed to the closing position.