US3735957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Individual
•
Filing: 1971-10-14
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Granted: 1973-05-29
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Expires: 1991-10-14
Abstract
Abstract A valve suitable for high pressure applications comprises a plug with a transverse bore which is rotatable through ninety degrees to bring the bore either into or out of registry with the conduit bore for the respective on and off positions. The plug has conically tapering portions which converge toward each end to cooperate with complimentary tapered bores in the valve housing to provide seals in the respective open and closed positions as the plug moves axially slightly during its rotation between such positions. Tightening of the valve cap on the valve housing threads is achieved by a screw which passes through the cap tangentially to and in engagement with spline-like teeth on the housing, rotation of the seated screw causing rotation of the cap on the housing.
Inventors
- 👤 A Duggar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:28
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/16; F16K5/162; F16K27/00; F16K27/06; F16K27/062
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
379 words
A valve comprising: a generally T-shaped housing having a first bore extending longitudinally along the head of the T and further having a second bore extending along the stem of the T and communicating with said first bore; said first bore being adapted to conduct fluid therethrough when the valve is open, and said second bore containing a valve plug movable rotatably and axially therein and projecting at all times completely across said first bore and into the head portion of the housing wall lying directly opposite to the stem of the T; the outer circumference of said T stem being threaded to receive an internally threaded portion of a cap, said cap being provided with an axial bore to receive said valve plug; said valve plug having first and second ends, said first end being connected by threaded means to said head portion of the housing wall lying directly opposite to the stem of the T, so that the rotation of said plug in a first direction advances said stem along said threaded means and rotation of said plug in the opposite direction withdraws said stem along said threaded means; said valve plug having a first smooth conically tapering surface which converges towards said first end and which is received in a complimentary tapering portion of said second bore on both sides of said first bore; said second end of said valve plug having a second smooth conically tapering surface which converges towards said second end and which is received in a complimentary tapering portion of said cap bore; said valve plug being further provided with a bore transverse to the longitudinal axis of said plug and positioned adjacent its first end and at a point whereby rotation of said valve plug in a first direction along said threaded means brings said valve plug bore into coaxial alignment with said housing first bore to open the valve to fluid flow, and rotation of said valve plug through about 90* in the opposite direction closes the valve to fluid flow; said valve providing a fluid-tight seal in the full open and full closed positions solely by the engagement of one of the tapered surfaces of said valve plug with its complimentary tapered surface on said housing or said cap.
Claim 2
Dependent Claim
379 words
A valve comprising: a generally T-shaped housing having a first bore extending longitudinally along the head of the T and further having a second bore extending along the stem of the T and communicating with said first bore; said first bore being adapted to conduct fluid therethrough when the valve is open, and said second bore containing a valve plug movable rotatably and axially therein and projecting at all times completely across said first bore and into the head portion of the housing wall lying directly opposite to the stem of the T; the outer circumference of said T stem being threaded to receive an internally threaded portion of a cap, said cap being provided with an axial bore to receive said valve plug; said valve plug having first and second ends, said first end being connected by threaded means to said head portion of the housing wall lying directly opposite to the stem of the T, so that the rotation of said plug in a first direction advances said stem along said threaded means and rotation of said plug in the opposite direction withdraws said stem along said threaded means; said valve plug having a first smooth conically tapering surface which converges towards said first end and which is received in a complimentary tapering portion of said second bore on both sides of said first bore; said second end of said valve plug having a second smooth conically tapering surface which converges towards said second end and which is received in a complimentary tapering portion of said cap bore; said valve plug being further provided with a bore transverse to the longitudinal axis of said plug and positioned adjacent its first end and at a point whereby rotation of said valve plug in a first direction along said threaded means brings said valve plug bore into coaxial alignment with said housing first bore to open the valve to fluid flow, and rotation of said valve plug through about 90* in the opposite direction closes the valve to fluid flow; said valve providing a fluid-tight seal in the full open and full closed positions solely by the engagement of one of the tapered surfaces of said valve plug with its complimentary tapered surface on said housing or said cap.
References Cited (Backward Citations)
US688298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |