US 10,473,228 B2Granted

Solenoid valve with an integrated check valve functionality for an air braking system of a heavy vehicle

AssigneeBendix Commercial Vehicle Systems LLC

InventorsChristopher H Hutchins, David W Howell, Thanh Ho, Tarah L Peabody

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Abstract

A solenoid valve comprises first, second, and third ports. The solenoid valve further comprises an armature movable between a first position in which fluid flow from the second port to the third port is blocked and fluid flow from the first port to the third port is unblocked and a second position in which fluid flow from the second port to the third port is unblocked and fluid flow from the first port to the third port is blocked. The fluid flow in the second position is blocked until fluid pressure at the first port exceeds fluid pressure at the third port by a predetermined amount to thereby provide check valve functionality. The check valve functionality is integral to the armature. The solenoid valve also comprises an energizeable solenoid that, when energized, moves the armature from the first position to the second position.

Claims13

Dependent claims

A solenoid valve with an integrated check valve functionality, the solenoid valve comprising:

first, second, and third ports;
an armature movable between a first position in which fluid flow from the second port to the third port is blocked and fluid flow from the first port to the third port is unblocked and a second position in which fluid flow from the second port to the third port is unblocked and fluid flow from the first port to the third port is blocked until fluid pressure at the first port exceeds fluid pressure at the third port by a predetermined amount of fluid pressure to thereby provide the check valve functionality, wherein the check valve functionality is integral to the armature;
the armature including:
a first armature portion that moves to allow fluid flow from the first port to the third port when the armature is in the second position and the fluid pressure at the first port exceeds the fluid pressure at the third port by the predetermined amount of fluid pressure;
a second armature portion that blocks fluid flow from the second port to the third port when the armature is in the first position and allows fluid flow from the second port to the third port when the armature is in the second position;
and
a wall portion having an opening along a path of travel and radially outward of the first armature portion;
and
a first biasing member positioned between the first and second armature portions and for providing a biasing force that corresponds to the predetermined amount of fluid pressure that the fluid pressure at the first port needs to exceed the fluid pressure at the third port before the first armature portion moves to allow fluid flow from the first port to the third port through the opening in the wall portion to provide the check valve functionality;
and
an energizeable solenoid, when energized, moves the armature from the first position to the second position.

8 more elements

A solenoid valve with an integrated check valve functionality for an air braking system of a heavy vehicle, the solenoid valve comprising:

a valve body having a first supply port, a second supply port, and a delivery port;
an armature positioned in the valve body including:
a first armature portion that allows fluid flow from the first supply port to the delivery port when the armature is in a first position and moves to allow fluid flow from the first supply port to the delivery port when the armature is in a second position and fluid pressure at the first supply port exceeds fluid pressure at the delivery port by a predetermined amount of fluid pressure;
and
a second armature portion that blocks fluid flow from the second supply port to the delivery port when the armature is in the first position and allows fluid flow from the second supply port to the delivery port when the armature is in the second position;
a wall portion having an opening along a path of travel and radially outward of the first armature portion;
and
a first biasing member positioned between the first and second armature portions and for providing a biasing force that corresponds to the predetermined amount of fluid pressure that the fluid pressure at the first supply port needs to exceed the fluid pressure at the delivery port before the first armature portion moves to allow fluid flow from the first supply port to the delivery port through the opening in the wall portion to provide the check valve functionality for the air braking system of the heavy vehicle, wherein the check valve functionality is integral to the armature;
and
an energizeable solenoid, when energized, moves the armature from the first position to the second position.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/619,592Filed 12 Jun 2017
Published: US 2018/0355994 A113 Dec 2018
Granted: 12 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F16K 31/0627
Lift valves: with movable valve member positioned between seats
B60T 8/341
Having a fluid pressure regulator responsive to a speed condition: systems characterised by their valves
B60T 8/362
Electromagnetic valves specially adapted for anti-lock brake and traction control systems: in pneumatic systems
B60T 13/26
The fluid being gaseous: compressed-air systems