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US 4,286,628 AGranted
Control of fluid flow using longitudinally movable disc
AssigneeNypro Inc.
InventorsJoseph R. Paradis, Edward W. Kaleskas
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Abstract
Apparatus for the control of fluid flow using a flexible disc that is positioned in a control channel and restricted to movement along the longitudinal axis of the channel. This avoids the disadvantages of variable positionable discs, while retaining their advantages. Closure control is exercised by moving the disc into closer contact with a ring seat that is essentially self-purging of debris. Since the disc is confined to essentially longitudinal movement, distortion due to random lateral movement is avoided.
Claims11
A flow control device comprising
- a housing;
- a flow channel in said housing extending to a control channel which is coaxial therewith;
- a valve seat in said control channel surrounding a further flow channel extending from said control channel;
- and
- a flexible disc positioned on said valve seat of said control channel,
- said control channel having an inside wall surface extending from said valve seat and interrupted by a plurality of peripheral relief channels;
- and
- means for prebiasing said flexible disc comprising a set of prongs for engaging the central portion of said disc within the opening of said valve seat and being separated by passageways which extend to said flow channel;
- said valve seat containing a counterbore which extends into said further flow channel, with at least one counterbore channel which is transverse to the axis of flow to insure that said disc will not be pulled into said further flow channel and produce undesired distortion and distension of said disc.
6 more elements
Dependencies are inferred from the claim text.