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:
May. 31, 2022
Filed:
Apr. 06, 2020
Hawe Hydraulik SE, Aschheim, DE;
Thomas Wechsel, Neubiberg, DE;
Bernd Faber, Rosenheim, DE;
HAWE Hydraulik SE, Aschheim, DE;
Abstract
A proportional hydraulic valve has a valve housing, an actuating device and a valve piston axially movable in a piston chamber of the valve housing. The valve housing has at least one pressure connection and at least one connection port. The valve piston blocks a flow path between the pressure connection and the connection port or releases it proportionally by moving the valve piston proportionally to an actuating force generated by the actuating device between a closed position and an open position. The valve piston has a first and a second spool area with a circumferential recess in the axial direction after the first and before the second spool area. The recess together with the piston chamber forms a pressure chamber and the pressure connection opens into the pressure chamber. A first diameter of the first spool area is larger than a second diameter of the second spool area.