Patent US4332267A successfully refreshed from Google Patents.
US4332267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valve assembly
Assignee: Baker International Corp
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Filing: 1980-04-18
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Granted: 1982-06-01
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Expires: 2000-04-18
Abstract
Abstract An improved mounting and sealing assembly is provided for a rotating ball valve required to open under increased differential pressures and close against high flow rates. The valve assembly includes a trunnion-mounted ball and two pressure biased sealing assemblies. The primary seal constitutes an elastomeric seal element which is axially shiftable into engagement with the ball, and the secondary seal comprises a metallic element which is also axially shiftable relative to the ball. To open the valve, the seals are moved in sequence axially away from the ball and the hydraulic seal is fully broken before the ball is rotated. In closing, the ball is rotated to its closed position and the seals then moved axially in sequence into contact with the ball.
Inventors
- 👤 Robert W. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:56
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/004; E21B23/006; E21B34/00; E21B34/06; E21B34/12; F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/20; F16K5/201; E21B2200/00; E21B2200/04; Y; Y10; Y10T; Y10T137/00; Y10T137/0318
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
The method for opening a rotary valve of the type having an apertured ball journalled for rotational movement in a fluid passage and, in its closed position, being sealingly engaged by a pair of concentric annular sealing members, one of said sealing members being formed from an elastomeric material, comprising the steps of: (a) axially shifting the one annular sealing member relative to the ball to disengage from the ball while the ball is in its closed position and the other annular sealing member remains in fully sealed engagement with the ball; (b) then axially shifting the other of the annular sealing elements relative to the ball to disengage from the ball so that rotation of the ball is resisted solely by the fluid stream in the passage; and (c) rotating the ball to an open position wherein the ball aperture is aligned with the fluid passage.
Claim 2
Independent Claim
147 words
The method for opening a rotary valve of the type having an apertured ball journalled for rotational movement in a fluid passage and, in its closed position, being sealingly engaged by a pair of concentric annular sealing members, one of said sealing members being formed from an elastomeric material, comprising the steps of: (a) axially shifting the one annular sealing member relative to the ball to disengage from the ball while the ball is in its closed position and the other annular sealing member remains in fully sealed engagement with the ball; (b) then axially shifting the other of the annular sealing elements relative to the ball to disengage from the ball so that rotation of the ball is resisted solely by the fluid stream in the passage; and (c) rotating the ball to an open position wherein the ball aperture is aligned with the fluid passage.
Claim 3
Independent Claim
161 words
The method of operating a rotary valve of the type having an apertured ball journalled for rotational movement in a fluid passage and, in its closed position, being sealingly engaged by a pair of concentric annular sealing members, one of said sealing members being formed from an elastomeric material, comprising the steps of: (a) axially shifting the one annular sealing member relative to the ball to disengage from the ball while the ball is in its closed position and the other annular sealing member remains in fully sealed engagement with the ball; (b) then axially shifting the other of the annular sealing elements relative to the ball to disengage from the ball so that rotation of the ball is resisted solely by the fluid stream in the passage; (c) rotating the ball to an open position wherein the ball aperture is aligned with the fluid passage; and (d) closing the valve by reversing steps (c), (b) and (a), in that sequence.
Claim 4
Independent Claim
161 words
The method of operating a rotary valve of the type having an apertured ball journalled for rotational movement in a fluid passage and, in its closed position, being sealingly engaged by a pair of concentric annular sealing members, one of said sealing members being formed from an elastomeric material, comprising the steps of: (a) axially shifting the one annular sealing member relative to the ball to disengage from the ball while the ball is in its closed position and the other annular sealing member remains in fully sealed engagement with the ball; (b) then axially shifting the other of the annular sealing elements relative to the ball to disengage from the ball so that rotation of the ball is resisted solely by the fluid stream in the passage; (c) rotating the ball to an open position wherein the ball aperture is aligned with the fluid passage; and (d) closing the valve by reversing steps (c), (b) and (a), in that sequence.
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) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |