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US 4,787,412 AGranted
Cartridge valve
AssigneeHagglunds Denison Corporation
InventorsRichard Wigmore, Michael S. Abraham
Life of this patent
Estimating the term…
Abstract
A cartridge valve having a valve housing adapted to receive a valve cartridge containing a spool and intake and exhaust passages.
Claims14
A cartridge valve which comprises:
- a valve housing having a first opening for a valve cartridge:
- a valve cartridge inserted into said first opening in said valve housing having a pressure port, a tank port, a first exhaust port and a second exhaust port;
- a valve element mounted in said valve cartridge movable between a first operative position, a second operative position and a third operative position;
- operating means mounted in said valve housing for operating said moveable valve element from said first operative position to one of said second or said third operative positions;
- spring means mounted in said valve cartridge for biasing said valve element towards said first said operative position;
- said operating means including a solenoid and a unitary armature element;
- said armature element including a second opening for receiving a portion of said valve cartridge;
- and
- a portion of said valve cartridge mounted in said second opening.
6 more elements
The cartridge valve of claim 7 in which:
- said spring means includes a pair of spring retainers and a spring;
- and
- wherein said spring acts to bias said retainers apart.
A cartridge valve which comprises:
- a valve housing having a first opening for receiving a valve cartridge;
- a valve cartridge inserted into said first opening in said opening in said valve housing having a pressure port, a tank port, a first exhaust port and a second exhaust port,
- a valve element mounted in said valve cartridge moveable between a first operative position, a second operative position and a third operative position;
- operating means mounted in said valve housing for operating said moveable valve element from said first operative position to one of said second or said third operative positions;
- spring means mounted in said valve cartridge for biasing said valve element towards said first said operative position;
- a first bore formed in said valve cartridge for receiving said valve element;
- a second bore formed in said valve cartridge for receiving said spring means;
- and
- wherein the axes of said first and said second bores are laterally displaced and are parallel.
6 more elements
A cartridge valve which comprises:
- a valve housing having a first opening for receiving a valve cartridge;
- a valve cartridge inserted into said first opening in said valve housing having a pressure port, a tank port, a first exhaust port and a second exhaust port;
- a valve element mounted in said valve cartridge moveable between a first operative position, a second operative position and a third operative position;
- operating means mounted in said valve housing for operating said moveable valve element from said first operative position to one of said second or said third operative positions;
- said operating means includes a solenoid and a unitary armature element;
- spring means mounted in said valve cartidge for biasing said valve element towards said first valve position;
- a first bore formed in said valve cartridge for receiving said valve element;
- a second bore formed in said valve cartridge for receiving said spring means;
- wherein the axes of said first and said second bores are laterally displaced and are parallel;
- said valve housing including a second opening for receiving said armature element;
- said armature element including a third opening for receiving a portion of said valve cartridge;
- said valve cartridge being mounted within said third opening;
- wherein said armature simultaneously engages said valve element and said spring means;
- and
- wherein said second opening is parallel to said first and said second bores formed in said valve cartridge.
12 more elements
Dependencies are inferred from the claim text.