Seal ring for pendulum valve assembly
AssigneeMKS Instruments, Inc.
InventorPaul D. Lucas
Life of this patent
Estimating the term…
Abstract
A valve assembly including a housing having a flow channel, a slide plate movable between a closed position and an opened position, and a seal ring surrounding the flow channel and engaging the slide plate in the closed position and disengaging the slide plate in the opened position. The seal ring has a plurality of bores aligned, respectively, with holes formed in an adjacent surface of the housing. Each bore includes an undercut defining a lip. A plurality of fasteners are arranged in the holes of the annular surface of the housing and extend into the corresponding bores of the seal ring. Side walls of the fasteners include slots, which catch on the lips of the bores of the seal ring when the fasteners are inserted into the bores of the seal ring, and the seal ring is rotated.
Claims20
A valve assembly comprising:
- a housing having a flow channel and an annular surface surrounding the flow channel, the annular surface having a plurality of holes having axes extending parallel to an axis of the flow channel;
- a slide plate located in the housing and movable transversely to the axis of the flow channel between a closed position, in which the slide plate blocks flow through the flow channel, and an opened position, in which the slide plate allows flow through the flow channel;
- a seal ring positioned between the annular surface of the housing and the slide plate and coaxially surrounding the flow channel, the seal ring engaging the slide plate in the closed position thereof and disengaging the slide plate in the opened position thereof, wherein the seal ring has, on a side facing the annular surface of the housing, a plurality of circumferentially arranged bores aligned, respectively, with the holes formed in the adjacent annular surface of the housing, and wherein the bores each include a side wall having an undercut forming a lip extending traverse to the side wall;
- and
- a plurality of fasteners displaceably arranged in the plurality of holes of the annular surface of the housing and extending into the plurality of bores, respectively, of the slide plate, wherein each of the fastener has side walls include slots, which receive the lips of the bores of the seal ring and secure the seal ring to the fasteners when the fasteners are inserted into the bores of the seal ring and the seal ring is rotated about the axis of the flow channel with respect to the annular surface of the housing.
Dependencies are inferred from the claim text.