Patent ID: 11971106
Assignee: G. W. LISK COMPANY, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 5:
6. A valve assembly comprising:
(a) a valve body having a gas passage bore, a valving bore extending along a longitudinal axis and intersecting the gas passage bore, a first annular bearing surface concentric with the longitudinal axis and a radially spaced apart second annular bearing surface concentric with the longitudinal axis, wherein an interface of the gas passage bore and the valving bore defines a flow port radially intermediate the first bearing surface and the second bearing surface; and
(b) a shaft valve extending along the longitudinal axis and rotatably mounted in the valving bore, the shaft valve having a first peripheral contact surface configured to engage the first bearing surface, a second peripheral contact surface configured to engage the second bearing surface and a vane radially intermediate the first peripheral contact surface and the second peripheral contact surface, wherein the first and the second peripheral contact surfaces have a given diameter and the vane encompasses the given diameter and wherein rotation of the shaft valve relative to the valve body selectively permits flow through the gas passage bore, wherein the valve body defines a pair of opposing sealing bands extending parallel to the longitudinal axis, each sealing band configured to engage a corresponding longitudinal edge of the vane, and wherein the shaft valve and the valve body are operable to prevent a flow of gas between the shaft valve and the valve body when the longitudinal edge of the vane is in contact with the sealings bands.