Valve assembly having a unitary valve sleeve
A valve assembly preferably including a housing having a recess and a flange face and a valve sleeve disposed within the recess. The sleeve preferably includes an annulus having an outer surface and an inner surface that defines a passageway about a central axis, the outer and inner surfaces being radially spaced from one another to define a wall. The wall has a first end portion and a second end portion axially spaced from the first end portion, and homogenous material properties from the first end portion to the second end portion. Preferably, the first end portion defines a lip for supporting the annulus in the recess and further defines a first chamber that encases at least a portion of a first support member. The second end portion preferably defines a flange portion along the outer surface for engaging the flange and further defines a second chamber that encases at least a portion of a second support member.
1. A method of forming a valve sleeve, the method comprising:
disposing a first substrate about a member in a mold chamber;
disposing a second substrate axially spaced from the first substrate and about the member, the second substrate comprising a ring-shaped plate member having a plurality of openings to receive a plurality of mold alignment pins;
inserting the plurality of mold alignment pins through the plurality of openings;
encapsulating at least a portion of the first substrate and at least a portion of the second substrate within an elastomeric material so as to form a body of unitary construction.
2. The method of claim 1 , wherein the first substrate is a ring.
3. The method of claim 1 , wherein the encapsulating comprises injection molding of the elastomeric material.
4. The method of claim 1 , wherein disposing the first and second substrates in the mold chamber comprises radially locating the first and second substrates in the mold chamber using the plurality of alignment pins.
5. The method of claim 4 , wherein each of the plurality of alignment pins has a circumference configured to be received within one of the plurality of openings, each of the plurality of alignment pins further having a notch at one end to receive the first substrate therein.
6. A method of forming a unitary valve sleeve, the method comprising:
disposing a first substrate in a mold chamber;
disposing a second substrate in the mold chamber, the second substrate comprising a ring-shaped plate member having a plurality of openings for receiving a plurality of alignment pins; and
inserting the plurality of mold alignment pins through the plurality of openings;
encapsulating the first and second substrates in an elastomeric material to form the unitary valve sleeve body.
7. The method of claim 6 , wherein the first substrate is a ring member.
8. The method of claim 6 , wherein introducing the elastomeric material includes injection molding of the material.
9. The method of claim 6 , wherein the plurality of openings are circular or triangular.
10. The method of claim 6 , wherein disposing the first and second substrates in the mold chamber comprises radially locating the first and second substrates in the mold chamber using the plurality of alignment pins.
11. The method of claim 10 , wherein each of the plurality of alignment pins has a circumference configured to be received within one of the plurality of openings, each of the plurality of alignment pins further having a notch at one end to receive the first substrate.