A valve and a valve assembly

Patent metadata

Field	Value
Publication number	US-2020370672-A1
Application number	US-201816766239-A
Country	US
Kind code	A1
Filing date	Nov 21, 2018
Priority date	Nov 21, 2017
Publication date	Nov 26, 2020
Grant date	—

Abstract

A valve (10) including a first port (12), a second port (14), a third port (16) and a flexure (30), the flexure (30) being moveable between a first position which causes the first port (12) to open, a second position which causes the second port (14) to open, and a third position which causes the first and second ports (12, 14) to close, wherein at least a part of the flexure (30) is magnetisable, to provide a first magnet (32), a second magnet (34) is associated with the first port (12) and a third magnet (36) is associated with the second port (14). A valve assembly includes a pair of valves wherein only one of the valves is operable at any given time.

First claim

1 . A valve including a first port, a second port, a third port and a flexure, the flexure being moveable between a first position which causes the first port to open, a second position which causes the second port to open, and a third position which causes the first and second ports to close, wherein at least a part of the flexure is magnetisable, to provide a first magnet, a second magnet is associated with the first port and a third magnet is associated with the second port.

2 . A valve according to claim 1 wherein the first and third magnets are electromagnets.

3 . A valve according to claim 1 wherein the second magnet is a permanent magnet.

4 . A valve according to claim 1 wherein the first port is an exhaust port, and the first position of the flexure corresponds with a failsafe configuration of the valve.

5 . A valve according to claim 1 wherein the second port is a supply port, and the second position of the flexure corresponds with an apply configuration of the valve.

6 . A valve according to claim 1 wherein the third port is a delivery port, and the third position of the flexure corresponds with a hold configuration of the valve.

7 . A valve according to claim 1 wherein the flexure is part of a flexure assembly which also includes a pair of moveable members, each of the moveable members being moveable, by the flexure, in a direction to open a respective one of the first port and the second port.

8 . A method of operating a valve according to claim 2 , wherein energisation of the first magnet enables movement of the flexure away from the first position, towards the third position.

9 . A method of operating a valve according to claim 8 , wherein energisation of the first magnet and the third magnet enables movement of the flexure towards the second position.

10 . A valve assembly including a first and second valve, each of the first and second valves including a first port, a second port, a third port and a flexure assembly, the flexure assembly being moveable between a first position which causes the first port to open, a second position which causes the second port to open, and a third position which causes the first and second ports to close, wherein at least a part of the flexure is magnetisable, to provide a first magnet, a second magnet is associated with the first port and a third magnet is associated with the second port, and wherein only one of the valves is operable at any given time.

11 . A valve assembly according to claim 10 wherein the second valve provides redundancy.

12 . A valve assembly according to claim 10 including a primary supply port and a secondary supply port.

13 . A valve assembly according to claim 12 including a third valve which enables the flow of fluid from one of the primary and secondary supply ports to the first and/or second valves whilst inhibiting the flow of fluid from the other of the primary and secondary supply ports to the first and second valves.

14 . A valve assembly according to claim 10 including a shared delivery port, and a further valve which enables the flow of fluid from the first port of one of the first and second valves, whilst inhibiting the flow of fluid from the first port of the other of the first and second valves.

15 . A vehicle braking system including a valve according to claim 1 .

16 . A vehicle braking system including a valve assembly according to claim 10 .

Assignees

• Haldex Brake Prod Ab

Inventors

• Mellings Carl
• Shaw Edward
• Jahnke Andreas

Classifications

• F16K31/0627 Primary

  with movable valve member positioned between seats · CPC title

• F16K31/0624

  Lift valves · CPC title

• F16K31/003

  operated without a stable intermediate position, e.g. with snap action (F16K31/56 takes precedence) · CPC title

• F16K31/0679

  with more than one energising coil · CPC title

• F16K31/082 Primary

  using a electromagnet and a permanent magnet · CPC title