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. 06, 2022
Filed:
Oct. 30, 2018
Zf Friedrichshafen Ag, Friedrichshafen, DE;
Karsten Kudermann, Constance, DE;
Rainer Novak, Bregenz, AT;
Markus Moosmann, Grünkraut, DE;
Tobias Pfleger, Markdorf, DE;
ZF FRIEDRICHSHAFEN AG, Friedrichshafen, DE;
Abstract
A valve (V, V, V) includes a housing (VG) and a piston (VK) displaceably guided therein. A first end (VK) of the piston (VK) can be acted upon by a force, with the aid of which the piston (VK) is displaceable against a spring (F) acting upon a second end (VK) of the piston (VK). The valve (V, V, V) has four switching conditions, in which four ports (A, B, P, T) in the housing (VG) are selectively connectable to one another or blocked with respect to one another. In a first switching condition, none of the ports (A, B, P, T) are connected to one another. The spring (F) is configured in such that, in the absence of an application of force onto the first end (VK), the piston (VK) is held in a position, which corresponds to the first switching condition of the valve (V, V, V).