Robert L Stark

US Patent:

46321489, Dec 30, 1986

Filed:

Sep 5, 1985

Appl. No.:

6/773374

Inventors:

Robert G. Stark - Seattle WA
Tom Stark - Sedro Wooley WA
Robert G. Stark - Portland OR
Joseph W. Anderson - Bellevue WA

International Classification:

F16K 1102

US Classification:

13762418

Abstract:

A hydraulic distribution valve having two substantially identical, molded plastic shells which are joined at their peripheries to form the distribution valve housing. A shaft is journaled within the housing and extends through one of the shells. A rotor is coupled to the shaft and is rotatably disposed within a rotor chamber defined by the housing. Each shell additionally defines a plurality of axially disposed cavities, where at least two of the cavities of the second shell communicate with the rotor chamber. The second shell also defines an inlet which communicates through a gallery which passes through a portion of the shaft and rotor for communication between the inlet and a control port which is defined by the rotor. The shaft and rotor can be rotated to align the exhaust port with a selected cavity to permit communication between the inlet and the selected cavity.

US Patent:

46274669, Dec 9, 1986

Filed:

Sep 5, 1985

Appl. No.:

6/773373

Inventors:

Robert G. Stark - Seattle WA
Robert G. Stark - Portland OR
Tom Stark - Sedro Wooley WA
Joseph W. Anderson - Bellevue WA

International Classification:

F16K 11044
F16K 31145
F01B 1900
F16J 302

US Classification:

1376255

Abstract:

A valve made from substantially all plastic parts that has integrally molded valve seats. A unique valve disk comprises two identical, mirror-image, molded plastic parts. The parts are of thin-walled construction but are joined together to give the valve body a substantially thick cross section with elongated shear surfaces in the radial direction. End flanges on the seal disk parts mechanically trap the soft sealing material and provide the maximum depth along the force line of contact between the sealing seat and the seal disk. The valve body has a cylinder and a cylinder cap of identically molded, mirror-image parts which house a diaphragm that overlies a plastic domed piston. The domed piston is provided with radially spaced circular ribs for supporting the diaphragm against excess deflection.