Patent · US Active

Valve, hydraulic system and motor vehicle gearbox

US11519513B2 · kind B2 · utility

0Cited by

8References

12Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Karsten Kudermann · Konstanz, DE
Rainer Novak · Bregenz, AT
Markus Moosmann · Grünkraut, DE
Tobias Pfleger · Markdorf, DE

Key dates

Filing date	Oct 30, 2018
Grant date	Dec 6, 2022
Priority date	—
Expiry date	Dec 19, 2038

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16K11/0716
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A valve (V, V1, V2) includes a housing (VG) and a piston (VK) displaceably guided therein. A first end (VK1) 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 (VK2) of the piston (VK). The valve (V, V1, V2) 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 (VK1), the piston (VK) is held in a position, which corresponds to the first switching condition of the valve (V, V1, V2).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.