US3666235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Throttling butterfly valve
Assignee: Eaton Corp
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Filing: 1970-04-13
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Granted: 1972-05-30
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Expires: 1990-04-13
Abstract
Abstract Butterfly fluid flow valve having substantial flow in the full open position of the valve. The valve has a peripheral sealing lip compressed along a frusto-spherical contoured seating surface, as the valve moves to its closed position, to provide a leak-proof seal. A throttling slot extends axially along the frusto-spherical contoured seating surface for approximately onehalf of valve rotation and accommodates a decreasing throttling flow as the valve moves from its full open position towards its closed position. The valve may be operated either by a vacuum motor, a manually operated lever or by any other suitable operating means.
Inventors
- 👤 Arthur A Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:47
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
235 words
A butterfly fluid flow valve comprising: a housing having, an internal cylindrical wall of one diameter extending along one end portion of said housing and defining a fluid flow wall portion, an axially aligned larger diameter cylindrical wall portion extending along the opposite end portion of said housing and defining a fluid flow chamber in direct fluid flow connection with said first-mentioned internal cylindrical wall, a uniformly contoured frusto-spherical valve seat diverging with respect to said first-mentioned internal cylindrical wall toward said larger diameter cylindrical wall, a shaft extending transversely of said larger diameter cylindrical wall portion and spaced along said larger diameter cylindrical wall portion from said frusto-spherical valve seat in a downstream direction, a compressible rubber butterfly valve element carried by said shaft within said large diameter cylindrical wall portion and having a frusto-conical outer wall, a resilient sealing lip at the large diameter end of said outer wall having compressive wiping, sealing engagement with said frusto-spherical valve seat and movable about the axis of said shaft to release said valve element from said valve seat and reduce the compression of said valve element to zero as said valve element moves to a wide open position, to accommodate the full flow of fluid through said housing, and a throttling notch extending longitudinally along said cylindrical wall portion of one diameter and along said frustospherical valve seat to said larger diameter cylindrical wall portion.
Claim 2
Dependent Claim
235 words
A butterfly fluid flow valve comprising: a housing having, an internal cylindrical wall of one diameter extending along one end portion of said housing and defining a fluid flow wall portion, an axially aligned larger diameter cylindrical wall portion extending along the opposite end portion of said housing and defining a fluid flow chamber in direct fluid flow connection with said first-mentioned internal cylindrical wall, a uniformly contoured frusto-spherical valve seat diverging with respect to said first-mentioned internal cylindrical wall toward said larger diameter cylindrical wall, a shaft extending transversely of said larger diameter cylindrical wall portion and spaced along said larger diameter cylindrical wall portion from said frusto-spherical valve seat in a downstream direction, a compressible rubber butterfly valve element carried by said shaft within said large diameter cylindrical wall portion and having a frusto-conical outer wall, a resilient sealing lip at the large diameter end of said outer wall having compressive wiping, sealing engagement with said frusto-spherical valve seat and movable about the axis of said shaft to release said valve element from said valve seat and reduce the compression of said valve element to zero as said valve element moves to a wide open position, to accommodate the full flow of fluid through said housing, and a throttling notch extending longitudinally along said cylindrical wall portion of one diameter and along said frustospherical valve seat to said larger diameter cylindrical wall portion.
Claim 3
Dependent Claim
79 words
The butterfly fluid flow valve of claim 1 wherein the internal cylindrical wall of one diameter defines a fluid flow inlet wall portion, wherein the larger diameter aligned cylindrical wall portion defines a flow chamber for outlet fluid, and wherein the throttling notch has a relatively large area opening to the inlet wall portion and converges as it extends along the valve seat from the inlet wall portion towards said outlet chamber and is generally V-shaped in cross section.
Claim 4
Dependent Claim
142 words
A butterfly fluid flow valve comprising: a housing, an internal cylindrical wall of one diameter extending along one end portion of said housing and defining a fluid flow wall portion, an axially aligned larger diameter cylindrical wall portion extending along the opposite end portion of said housing and defining a flow chamber in direct communication with said fluid flow wall portion, a diverging frusto-conical wall leading from said internal cylindrical wall portion of one diameter, a uniformly contoured frusto-spherical wall diverging with respect to said frusto-conical wall to said larger diameter cylindrical wall portion and defining a frusto-spherical valve seat, a resilient butterfly valve element having a peripheral sealing lip compressively engaged with said frusto-spherical contoured wall during valve movement from its open toward its closed position, and a throttling notch extending longitudinally along said frusto-spherical diverging wall forming the valve seat.
Claim 5
Dependent Claim
142 words
A butterfly fluid flow valve comprising: a housing, an internal cylindrical wall of one diameter extending along one end portion of said housing and defining a fluid flow wall portion, an axially aligned larger diameter cylindrical wall portion extending along the opposite end portion of said housing and defining a flow chamber in direct communication with said fluid flow wall portion, a diverging frusto-conical wall leading from said internal cylindrical wall portion of one diameter, a uniformly contoured frusto-spherical wall diverging with respect to said frusto-conical wall to said larger diameter cylindrical wall portion and defining a frusto-spherical valve seat, a resilient butterfly valve element having a peripheral sealing lip compressively engaged with said frusto-spherical contoured wall during valve movement from its open toward its closed position, and a throttling notch extending longitudinally along said frusto-spherical diverging wall forming the valve seat.
Claim 6
Dependent Claim
59 words
The butterfly valve of claim 3, wherein the throttling notch extends along said internal cylindrical wall of one diameter and along said frusto-spherical valve seat to the end thereof, and is generally V-shaped in cross section and converges from said internal cylindrical wall of one diameter along said frusto-spherical wall to said axially aligned larger diameter cylindrical wall portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |