US3756260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: Individual
•
Filing: 1971-02-08
•
Granted: 1973-09-04
•
Expires: 1991-02-08
Abstract
Abstract Valves of the sliding gate and rotary plug types having a body with inlet and outlet ports, an apertured closure assembly controlling flow therethrough including a primary closure member and a secondary closure member, and a soft seal means surrounding at least one of said ports and sealing between the body and the closure assembly, said secondary closure member co-acting with said primary closure to close said aperture means of said closure assembly prior to movement of said aperture means past said seal means to maintain effectiveness of said seal means between the body and closure assembly. Single and multiple port sliding gate valves and cylindrical, tapered, and ball type plug valves provided with such closure assemblies are disclosed.
Inventors
- 👤 J Fredd
- 👤 J Tamplen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:20
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K3/00; F16K3/02; F16K3/0254; F16K5/00; Y; Y10; Y10T; Y10T137/00; Y10T137/0318
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
241 words
The method of operating a valve having a body with a flow passage therethrough with seal means surrounding said flow passage and having a valve closure member with an aperture therethrough movable into and out of flow communication with the flow passage through the valve body to open and close said flow passage, comprising: closing said aperture of said valve closure member with a secondary closure by relative movement between said secondary closure and said valve closure member; forming by said secondary closure member a substantially continuous imperforate supporting surface in said aperture conforming in shape to the shape of the exterior surface of the valve closure member; positively holding said secondary closure and said valve closure member in said position closing said aperture of said valve closure member for maintaining said aperture closed by said secondary closure member; moving said valve closure member and said secondary closure while held in said closed position to move said closed aperture past said seal means into and out of flow communication with the flow passage in the body; maintaining said seal means in sealing contact with the body and the valve closure member and the supporting surface formed by said secondary closure as said closed aperture of said valve closure member is moved past said seal means; and supporting said seal means by said supporting surface formed by said secondary closure to prevent extrusion and damage to said seal means during such movement.
Claim 2
Independent Claim
241 words
The method of operating a valve having a body with a flow passage therethrough with seal means surrounding said flow passage and having a valve closure member with an aperture therethrough movable into and out of flow communication with the flow passage through the valve body to open and close said flow passage, comprising: closing said aperture of said valve closure member with a secondary closure by relative movement between said secondary closure and said valve closure member; forming by said secondary closure member a substantially continuous imperforate supporting surface in said aperture conforming in shape to the shape of the exterior surface of the valve closure member; positively holding said secondary closure and said valve closure member in said position closing said aperture of said valve closure member for maintaining said aperture closed by said secondary closure member; moving said valve closure member and said secondary closure while held in said closed position to move said closed aperture past said seal means into and out of flow communication with the flow passage in the body; maintaining said seal means in sealing contact with the body and the valve closure member and the supporting surface formed by said secondary closure as said closed aperture of said valve closure member is moved past said seal means; and supporting said seal means by said supporting surface formed by said secondary closure to prevent extrusion and damage to said seal means during such movement.
Claim 3
Dependent Claim
81 words
The method of claim 1 including the further step of: releasing said secondary closure from said position in which it is held positively closing said aperture of said valve closure member; and opening the aperture through said valve closure member by relative movement between said secondary closure and said valve closure member to open said flow passage through said valve body after said closed aperture has been moved past said seal means into position for flow communication with said flow passage.
Claim 4
Independent Claim
163 words
The method of operating a valve having a body with a flow passage therethrough with seal means surrounding said flow passage and having a valve closure member with an aperture therethrough movable into and out of registry with the flow passage through the valve body in sealing engagement with said seal means to open and close said flow passage, comprising: closing said aperture of said closure member with a secondary closure movable relative to said valve closure member to provide a smooth continuous substantially imperforate surface engaging said seal means in said valve body; moving said closure member and said secondary closure simultaneously in said closed position in said valve body past said seal means while in simultaneous engagement with said seal means; and securiNg said valve closure member and said secondary closure in position maintaining said aperture closed by said secondary closure during movement of said closed aperture past said seal means between flow passage opening and closing positions in said body.
Claim 5
Independent Claim
163 words
The method of operating a valve having a body with a flow passage therethrough with seal means surrounding said flow passage and having a valve closure member with an aperture therethrough movable into and out of registry with the flow passage through the valve body in sealing engagement with said seal means to open and close said flow passage, comprising: closing said aperture of said closure member with a secondary closure movable relative to said valve closure member to provide a smooth continuous substantially imperforate surface engaging said seal means in said valve body; moving said closure member and said secondary closure simultaneously in said closed position in said valve body past said seal means while in simultaneous engagement with said seal means; and securiNg said valve closure member and said secondary closure in position maintaining said aperture closed by said secondary closure during movement of said closed aperture past said seal means between flow passage opening and closing positions in said body.
Claim 6
Dependent Claim
35 words
The method of claim 3 including the further step of: maintaining said valve closure member and said secondary closure in sealing engagement with said seal means during movements of said aperture past said seal means.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |