US 2020/0271231 A1 · Valve, Hydraulic System and Motor Vehicle Gearbox

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).

Claims17

Dependent claims

1-15. (canceled)

A valve (V, V1, V2), comprising:

a housing (VG);
and
a piston (VK) displaceably guided in the housing (VG), a first end (VK1) of the piston (VK) configured to be acted upon by a force for displacing the piston (VK) against a spring (F), the spring (F) acting upon a second end (VK2) of the piston (VK), the valve (V, V1, V2) having four switching conditions, four ports (A, B, P, T) provided in the housing (VG) selectively connected to one another or blocked with respect to one another in the four switching conditions,
wherein none of the four ports (A, B, P, T) are connected to one another in a first switching condition of the four switching conditions, and
wherein the spring (F) is configured such that the piston (VK) is held in a position corresponding to the first switching condition when the force is not applied to the first end (VK1) of the piston (VK).

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/761,611Filed 30 Oct 2018

Priority

DE 10 2017 219 645.96 Nov 2017

Published

27 Aug 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

F16K 11/07
With linearly sliding closure members: with cylindrical slides
F15B 13/0402
Valve members; Fluid interconnections therefor: for linearly sliding valves, e.g. spool valves
F16H 61/0251
The signals being electric: elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
F16H 61/30
With at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted: hydraulic or pneumatic…

Valve, Hydraulic System and Motor Vehicle Gearbox

Life of this patent

Valve, Hydraulic System and Motor Vehicle Gearbox

Life of this patent

Abstract

Claims17