US 2025/0207673 A1Published application

Directional valve

AssigneeFesto AG & Co.

InventorsEduard USINGER, Eduard WENSKE

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Abstract

A directional valve including a valve housing, in which a slide receiving space is formed extending in a longitudinal direction and limited radially outwards by a peripheral receiving space boundary surface, in which a plurality of valve channels open, which pass through the valve housing and are spaced in the longitudinal direction at points in the peripheral receiving space boundary surface, and in which a valve slide, having at least one slide body, is arranged, which is displaceable in the longitudinal direction between a plurality of switch positions by executing a switching movement, and with at least one check valve member, which is movable relative to the slide body depending on the applied pressure difference, a receiving chamber is formed in the slide body. The check valve member is arranged axially movable and which is connected to the feed channel via a connecting channel formed in the slide body.

Claims21

Dependent claims

A directional valve comprising:

a valve housing, in which a slide receiving space is formed extending in a longitudinal direction along a longitudinal axis and limited radially outwards by a peripheral receiving space boundary surface,
in which a plurality of valve channels, which pass through the valve housing and are spaced in the longitudinal direction at points in the peripheral receiving space boundary surface, open, and
in which, a valve slide, having at least one slide body, is arranged, which is displaceable in the longitudinal direction between a plurality of switch positions under execution of a switching movement,
wherein the valve channels contain at least one feed channel that can be connected to a fluidic pressure source and at least one working channel that can be connected to an actuated fluid consumer,
wherein the feed channel opens into a feed longitudinal section and the working channel opens into a working longitudinal section of the slide receiving space axially adjoining the feed longitudinal section,
wherein the valve slide in a first switch position fluid-tightly separates the feed longitudinal section from the working longitudinal section, and in a second switch position releases a fluid connection between the feed longitudinal section and the adjacent working longitudinal section, and
at least one check valve, having a check valve member, which is movable relative to the slide body depending on the applied pressure difference,
wherein in the slide body, a receiving chamber is formed, in which the check valve member is arranged axially movable and which is connected to the feed longitudinal section via a connecting channel formed in the slide body,
wherein a valve seat is located opposite the check valve member, which borders an overflow opening, which is connected to the working longitudinal section of the slide receiving space via a relief channel.

6 more elements

A valve slide for a directional valve, wherein the directional valve has a valve housing, in which a slide receiving space, provided for receiving the valve slide, is formed extending in a longitudinal direction along a longitudinal axis and limited radially outwards by a peripheral receiving space bordering surface, in which a plurality of valve channels, which pass through the valve housing, open, spaced in the longitudinal direction at points in the peripheral receiving space bordering surface, and wherein the valve slide has a slide body, wherein a receiving chamber is formed in the slide body, in which at least one check valve is accommodated, which has a check valve member arranged in an axially movable manner in the receiving chamber.

A method for retro-fitting a directional valve comprising a valve housing, in which a slide receiving space is formed extending in a longitudinal direction along a longitudinal axis and limited radially outwards by a peripheral receiving space boundary surface, a plurality of valve channels open, which pass through the valve housing and are spaced in the longitudinal direction at points in the peripheral receiving space boundary surface, and a valve slide having at least one slide body, is arranged, which is displaceable in the longitudinal direction between a plurality of switch positions by executing a switching movement, the method comprising the following steps:

removal of the valve slide from the directional valve and
replacement of the removed valve slide by installing a valve slide, in which a receiving chamber is formed, in which at least one check valve is accommodated, having a check valve member arranged in an axially movable manner in the receiving chamber.

Dependencies are inferred from the claim text.

Facts

Application: 18/984,479Filed 17 Dec 2024
Priority: DE 102023136193.721 Dec 2023
Published: 26 Jun 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16K 11/0716
With cylindrical slides: with fluid passages through the valve member
F15B 13/025
Fluid distribution or supply devices characterised by their adaptation to the control of servomotors: pressure reducing valves
F15B 13/027
Fluid distribution or supply devices characterised by their adaptation to the control of servomotors: check valves
F15B 13/0403
For linearly sliding valves, e.g. spool valves: a secondary valve member sliding within the main spool, e.g. for regeneration flow

Family

No related US applications are recorded in the indexed filing history.

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