Cartridge type valve

Claim 2

A valve assembly comprising a housing having an open-sided chamber formed by a plurality of surfaces, a valve plate portion of said housing having a plurality of ports leading to a first of said surfaces, a valve cartridge having a plurality of passageways extending therethrough and said passageways having ends in communication with said ports, said cartridge having a bore intersecting said passageways along an axis transverse to said passageways, a flow control member received in said bore for movement along said axis, a second surface of said chamber disposed over the other ends of said passageways and third and fourth surfaces of said chamber respectively disposed at the ends of said bore, and resilient means between said cartridge and said first and second surfaces of said chamber for isolating stresses in said housing from said cartridge.

Claim 3

The assembly of claim 1 wherein said resilient means include seals about the ends of said passageways.

Claim 4

The assembly of claim 2 and including second resilient means between the ends of said bore and said third and fourth surfaces, said second resilient means comprising seals about the ends of said bore.

Claim 5

The assembly of claim 1 wherein said housing includes a cover member separable from said valve plate portion and wherein said second surface is an inner surface of said cover, and including fastening means to secure said cover member to said valve plate portion.

Claim 6

The assembly of claim 4 wherein said fastening means are located longitudinally outboard of the ends of said caRtridge.

Claim 7

The assembly of claim 4 wherein said fastening means are bolts extending through said cover into said subplate portion.

Claim 8

The assembly of claim 4 wherein said fastening means are spring clip means extending between said cover and said valve plate portion.

Claim 9

The assembly of claim 4 wherein said one end of said cover member is hingedly secured to said valve plate portion.

Claim 10

The assembly of claim 4 wherein said third and fourth surfaces are formed by downwardly depending leg portions on the ends of said cover member disposed over the ends of said bore of said cartridge.

Claim 11

The assembly of claim 1 wherein said cartridge has two surfaces forming exterior sides of said assembly at said open sides of said chamber.

Claim 12

The assembly of claim 1 wherein said first and second surfaces are substantially parallel to said axis and parallel to one another.

Claim 13

The assembly of claim 1 wherein said passageways are elongated in a direction normal to said axis and formed by walls of substantially equal thickness.

Claim 14

The assembly of claim 1 wherein said cartridge is formed with a solenoid chamber in at least one end thereof, and a solenoid is received in said chamber.

Claim 15

In a valve assembly having a spool reciprocably received in a valve cartridge of ferromagnetic properties and said cartridge having first and second chambers separated by a wall and said wall having an opening therein, the improvement comprising an insert in said first chamber having a counterbore receiving one end of said spool and a passageway communicating a pressure in said first chamber to a vent between said counterbore and one end of said passageway, a coil disposed in said second chamber having a central opening in alignment with said one end of said passageway, a pilot assembly in said central opening, said assembly comprising a plunger having a first seat closure at one end thereof extending through the opening of said wall and disposed opposite said passageway and, a second seat closure at the other end of said plunger, a pole piece having a second passageway leading to atmosphere and said second seat closure adapted to close said second passageway, a non-magnetic casing about said pole piece and plunger, spring means between said pole piece and said plunger biasing said plunger in a direction to urge said first seat toward said first passageway, a third passageway between said vent and said second passageway, whereby when said coil is energized, the plunger moves to close said second passageway and said pilot pressure is communicated to said counterbore through said vent.

Claim 16

In a valve assembly having a spool reciprocably received in a valve cartridge of ferromagnetic properties and said cartridge having first and second chambers separated by a wall and said wall having an opening therein, the improvement comprising an insert in said first chamber having a counterbore receiving one end of said spool and a passageway communicating a pressure in said first chamber to a vent between said counterbore and one end of said passageway, a coil disposed in said second chamber having a central opening in alignment with said one end of said passageway, a pilot assembly in said central opening, said assembly comprising a plunger having a first seat closure at one end thereof extending through the opening of said wall and disposed opposite said passageway and, a second seat closure at the other end of said plunger, a pole piece having a second passageway leading to atmosphere and said second seat closure adapted to close said second passageway, a non-magnetic casing about said pole piece and plunger, spring means between said pole piece and said plunger biasing said plunger in a direction to urge said first seat toward said first passageway, a third passageway between said vent and said second passageway, whereby when said coil is energized, the plunger moves to close said second passageway and said pilot pressure is communicated to said counterbore through said vent.

Claim 17

The valve assembly of claim 14 wherein said cartridge provides the flux path for said coil.

Claim 18

The valve assembly of claim 14 with means to secure said pilot assembly for ready replacement.