US3815871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow poppet valve
Assignee: Celotex Corp
•
Filing: 1972-08-30
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Granted: 1974-06-11
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Expires: 1992-08-30
Abstract
Abstract A hollow poppet valve is provided with a diagonal O-ring seal surrounding a hollow poppet valve stem having a sloping leading edge. The valve also has a smooth, curved lip adjacent the inner rim of the discharge passage which contacts the o-ring when the hollow poppet valve stem is rotated from a closed to open position or the reverse. A rounded groove in the face of the valve stem prevents o-ring lift-off with high velocity fluid flow.
Inventors
- 👤 G Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:52
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/04; F16K5/0414
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
242 words
A rotary valve for controlling the flow of fluids comprising: inlet and outlet passageways having longitudinal axes, a hollow poppet valve stem mounted in said inlet passageway, and rotatable between an open position and a closed position, said valve stem having a face bevelled at an angle with respect to said longitudinal axis of said inlet passageway, said valve stem having a closed hollow cylindrical bore with flexible sidewalls extending along said longitudinal axis of said inlet passageway from said face toward the rear of said valve stem: said valve stem having a sealing member receiving groove cut therein in a plane lying at an angle with respect to said longitudinal axis of said inlet passageway and located such that said groove lies between said inlet passageway and said outlet passageway when said rotary valve is in a closed position, and said groove lies entirely outside the path of flow of said liquid from said inlet passageway to said outlet passageway when said rotary valve is in an open position, a sealing member carried in said groove and frictionally engaged said valve stem and said inlet passageway to prevent liquid flow from said inlet passageway to said outlet passageway when said valve is in its closed position and to permit unimpeded flow of liquid when said valve is in its open position, and operating means connected to said valve stem to rotate said valve stem between an open and a closed position.
Claim 2
Dependent Claim
242 words
A rotary valve for controlling the flow of fluids comprising: inlet and outlet passageways having longitudinal axes, a hollow poppet valve stem mounted in said inlet passageway, and rotatable between an open position and a closed position, said valve stem having a face bevelled at an angle with respect to said longitudinal axis of said inlet passageway, said valve stem having a closed hollow cylindrical bore with flexible sidewalls extending along said longitudinal axis of said inlet passageway from said face toward the rear of said valve stem: said valve stem having a sealing member receiving groove cut therein in a plane lying at an angle with respect to said longitudinal axis of said inlet passageway and located such that said groove lies between said inlet passageway and said outlet passageway when said rotary valve is in a closed position, and said groove lies entirely outside the path of flow of said liquid from said inlet passageway to said outlet passageway when said rotary valve is in an open position, a sealing member carried in said groove and frictionally engaged said valve stem and said inlet passageway to prevent liquid flow from said inlet passageway to said outlet passageway when said valve is in its closed position and to permit unimpeded flow of liquid when said valve is in its open position, and operating means connected to said valve stem to rotate said valve stem between an open and a closed position.
Claim 3
Dependent Claim
44 words
A rotary valve as recited in claim 1 in which said face of said valve stem has a groove cut in said face and the plane of said bevel to guide the flow of the liquid from said inlet passageway to said outlet passageway.
Claim 4
Dependent Claim
25 words
A rotary valve as recited in claim 1 in which said outlet passageway has a smooth, curved rim at its junction with the inlet passageway.
Claim 5
Dependent Claim
37 words
A rotary valve as recited in claim 1 in which said operating means includes means connected to said valve and to said valve stem for limiting rotational movement of said valve stem to an arc of 180*.
Claim 6
Dependent Claim
50 words
A rotary valve as recited in claim 1 in which the angle of said bevelled face with respect to the longitudinal axis of said inlet passageway is the same as the angle of the longitudinal axis of said outlet passageway with respect to said longitudinal axis of said inlet passageway.
Claim 7
Dependent Claim
33 words
A rotary valve as recited in claim 2 in which the deepest wall of said groove is aligned with one wall of said outlet passageway when said valve is in its open position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |