US3565392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow-blocking device with retractable sealing means
Assignee: Grove Valve and Regulator Co
•
Filing: 1969-04-28
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Granted: 1971-02-23
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Expires: 1989-04-28
Abstract
Abstract Retractable sealing means for flow-blocking devices, including valves, comprising an anchor member secured to the body of the device around the seat ring assembly. Annular members on the anchor member and seat ring, respectively, are disposed in opposition to each other, and one forms an annular piston received in an annular fluid chamber formed in the other. A fluid duct extending through a housing wall opens into the chamber so that pressure fluid may be introduced to retract the seat ring from the flow-blocking device against which it seals.
Inventors
- 👤 Austin U Bryant
- 👤 Jack E Piccardo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:48
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/20; F16K5/205
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
The combination defined by claim 1 wherein said duct means extends through said body member and said anchor member.
Claim 2
Dependent Claim
19 words
The combination defined by claim 1 including a seal ring in said chamber sealing between opposite concentric walls thereof.
Claim 3
Dependent Claim
26 words
The combination defined by claim 1 including a resilient seal ring in said annular chamber compressed between said concentric cylindrical walls to form a seal therewith.
Claim 4
Dependent Claim
27 words
The combination defined by claim 2 wherein: the annular chamber is on said anchor member; and said annular piston is disposed to push against said seat ring.
Claim 5
Dependent Claim
33 words
The combination defined by claim 2 wherein: the annular chamber is on said seat ring; the annular piston is fixed on said anchor member; and the duct means extends through the annular piston.
Claim 6
Dependent Claim
61 words
The combination defined by claim 1 including: an annular space around the trailing portion of said seat ring and said body member: said seal means comprising axially spaced seal rings sealing against leakage in either direction from said annular space; and second duct means for introducing pressure fluid into said annular space to urge said seat ring toward said closure member.
Claim 7
Dependent Claim
15 words
The combination defined by claim 1 wherein: said annular members generally surround said seat ring.
References Cited (Backward Citations)
US2370751A
Cited
US2796230A
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US3043469A
Cited
US3110470A
Cited
US3266525A
Cited
US3463448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |