US3780985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve with elliptical sealing
Assignee: Individual
•
Filing: 1972-04-24
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Granted: 1973-12-25
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Expires: 1992-04-24
Abstract
Abstract A plug or ball valve wherein either the rotary valve member, or its chamber in the valve body, is substantially elliptical in a plane perpendicular to the axis of rotation, with the axes of the ellipse so oriented that the clearances between the surface of the valve member and the surface of the valve chamber are a minimum around the ports in the valve body in the closed position of the valve member, and are a maximum intermediate the ports in the valve body in the closed position of the valve member. With this construction, maximum sealing effectiveness in the closed position of the valve member is achieved, along with other advantages, such as reducing the torque required to rotate the valve member.
Inventors
- 👤 D Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:08
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/06; F16K27/067; F16K27/062; F16K5/00; F16K5/02; F16K5/0207; F16K5/06; F16K5/0663; F16K5/0689
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
270 words
In a rotary valve, the combination of: a. a valve body provided therein with a valve chamber having an axis of rotation and having an internal peripheral surface provided with alternative ported and unported portions spaced apart about said axis of rotation; b. said valve body naving ports in said ported portions of said valve chamber which communicate with said valve chamber; c. a valve member rotatable in said valve chamber about said axis of rotation and having an external peripheral surface provided with alternate ported and unported portions spaced apart about said axis of rotation; d. said valve member having ports in said ported portions thereof and having a passage interconnecting said ports therein; e. said valve member having an open position wherein said ports in said valve member register with said ports in said valve body and said unported portions of said valve member register with said unported portions of said valve chamber; f. said valve member having a closed position wherein said ports in said valve member register with said unported portions of said valve chamber and said unported portions of said valve member register with said ports in said valve body; g. said valve chamber being enlarged in the regions of the unported portions thereof to provide relatively large clearances between said ported portions of said valve member and said unported portions of said valve chamber in said closed position of said valve member; and h. whereby there are relatively small clearances between said unported portions of said valve member and said ported portions of said valve chamber in said closed position of said valve member.
Claim 2
Dependent Claim
270 words
In a rotary valve, the combination of: a. a valve body provided therein with a valve chamber having an axis of rotation and having an internal peripheral surface provided with alternative ported and unported portions spaced apart about said axis of rotation; b. said valve body naving ports in said ported portions of said valve chamber which communicate with said valve chamber; c. a valve member rotatable in said valve chamber about said axis of rotation and having an external peripheral surface provided with alternate ported and unported portions spaced apart about said axis of rotation; d. said valve member having ports in said ported portions thereof and having a passage interconnecting said ports therein; e. said valve member having an open position wherein said ports in said valve member register with said ports in said valve body and said unported portions of said valve member register with said unported portions of said valve chamber; f. said valve member having a closed position wherein said ports in said valve member register with said unported portions of said valve chamber and said unported portions of said valve member register with said ports in said valve body; g. said valve chamber being enlarged in the regions of the unported portions thereof to provide relatively large clearances between said ported portions of said valve member and said unported portions of said valve chamber in said closed position of said valve member; and h. whereby there are relatively small clearances between said unported portions of said valve member and said ported portions of said valve chamber in said closed position of said valve member.
Claim 3
Dependent Claim
226 words
In a rotary valve having elliptical sealing, the combination of: a. a valve body provided therein with a valve chamber having an axis of rotation and having an internal, peripheral, valve chamber surface provided with opposed ports spaced apart about said axis of rotation by substantially 180* ; b. a valve member rotatable in said valve chamber about said axis of rotation and having an external, peripheral, valve member surface provided with opposed ports spaced apart about said axis of rotation by substantially 180* and interconnected by a passage through said valve member; c. said valve member having an open position wherein said ports in said valve member register with said ports in said valve body; d. said valve member having a closed position wherein said ports in said valve member are out of register with said ports in said valve body; and e. said valve chamber surface being substantially elliptical in a plane perpendicular to said axis of rotation with the minor axis of the ellipse extending between said ports in said valve body so that the clearances between said valve member surface and said valve chamber surface are a minimum around said ports in said valve body in the closed position of said valve member, and are a maximum around said ports in said valve member in the closed position of said valve member.
Claim 4
Dependent Claim
226 words
In a rotary valve having elliptical sealing, the combination of: a. a valve body provided therein with a valve chamber having an axis of rotation and having an internal, peripheral, valve chamber surface provided with opposed ports spaced apart about said axis of rotation by substantially 180* ; b. a valve member rotatable in said valve chamber about said axis of rotation and having an external, peripheral, valve member surface provided with opposed ports spaced apart about said axis of rotation by substantially 180* and interconnected by a passage through said valve member; c. said valve member having an open position wherein said ports in said valve member register with said ports in said valve body; d. said valve member having a closed position wherein said ports in said valve member are out of register with said ports in said valve body; and e. said valve chamber surface being substantially elliptical in a plane perpendicular to said axis of rotation with the minor axis of the ellipse extending between said ports in said valve body so that the clearances between said valve member surface and said valve chamber surface are a minimum around said ports in said valve body in the closed position of said valve member, and are a maximum around said ports in said valve member in the closed position of said valve member.
Claim 5
Dependent Claim
20 words
A rotary valve according to claim 2 wherein said valve chamber is substantially cylindrical and said valve member is cylindrical.
Claim 6
Dependent Claim
21 words
A rotary valve as defined in claim 2 wherein said valve chamber is substantially spherical and said valve member is spherical.
Claim 7
Dependent Claim
39 words
A rotary valve as set forth in claim 2 wherein said valve chamber and said valve member are tapered in the direction of said axis of rotation and said valve member is circular in cross section throughout its length.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |