US3567176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valve assembly with stem actuator seal
Assignee: Individual
•
Filing: 1968-12-20
•
Granted: 1971-03-02
•
Expires: 1988-12-20
Abstract
Abstract This application discloses a ball valve assembly in which a valve ball is preloaded between annular seals, at least one of which is carried by a resilient structural conduit member, specifically in a groove of the resilient member, the sides of the groove seat fitting the ball surface to provide a fail-safe seal when the sealing ring is worn down, the valve being especially suitable for lined and fully sealed pipes adapted to carry corrosive, radioactive, or otherwise harmful or dangerous fluids and having a fully sealed valve operator which is preferably urged tight by internal fluid pressure.
Inventors
- 👤 Herbert G Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:18
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/06; F16K27/067; F16K5/00; F16K5/06; F16K5/0626; F16K5/0631; F16K5/0657; F16K5/08; F16K5/14; F16K5/20; F16K5/205; F16K5/208
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
114 words
A ball valve assembly comprising in combination, a ball valve casing, a valve ball operatively and sealingly mounted in the valve casing, a valve stem casing, a ball-turning stem turnably mounted in said valve stem casing and separably engaging a socket in the valve ball, and static nonsliding hermetic sealing means for said valve stem, comprising a tubular twistable envelope of flexible corrosion-resistant material sealingly secured at its outer end to said valve stem casing and sealingly secured at its inner end to the valve stem at a point disposed within said socket in said assembly, providing for turning the valve stem and valve ball through the necessary extensive angle by twisting said envelope.
Claim 2
Dependent Claim
114 words
A ball valve assembly comprising in combination, a ball valve casing, a valve ball operatively and sealingly mounted in the valve casing, a valve stem casing, a ball-turning stem turnably mounted in said valve stem casing and separably engaging a socket in the valve ball, and static nonsliding hermetic sealing means for said valve stem, comprising a tubular twistable envelope of flexible corrosion-resistant material sealingly secured at its outer end to said valve stem casing and sealingly secured at its inner end to the valve stem at a point disposed within said socket in said assembly, providing for turning the valve stem and valve ball through the necessary extensive angle by twisting said envelope.
Claim 3
Dependent Claim
21 words
A ball valve assembly as set forth in claim 1, wherein said envelope is comprised of a longitudinally corrugated flexible material.
Claim 4
Dependent Claim
85 words
A ball valve assembly as set forth in claim 1, wherein said stem includes an annular flange disposed interiorly below an apertured closure wall, and an annular sealing member disposed between said annular stem flange and said closure wall and within the outer end portion of said envelope where secured to said valve stem casing, said sealing member comprising corrosion-resistant fatigue-resistant material sealingly secured to said closure wall at its stem aperture to act as a secondary seal in case of failure of said envelope.
Claim 5
Dependent Claim
23 words
A ball valve assembly as set forth in claim 3, wherein said sealing member and said envelope are comprised of a fluorocarbon polymer.
Claim 6
Dependent Claim
36 words
A ball valve assembly as set forth in claim 1, in which the inner end of said envelope is closed and embraces the inner end of the valve stem in its socket in the valve ball.
Claim 7
Dependent Claim
68 words
A ball valve assembly as set forth in claim 1, in which end sealing means are provided at the opposite ends of the valve ball, said sealing means for at least one end of the valve ball having resilient mounting means, the sealing envelope on the valve stem within the ball socket providing yield for movement of the valve ball provided by said resilient ball seal mounting means.
Claim 8
Dependent Claim
59 words
A ball valve assembly as set forth in claim 6, in which resilient mounting means for the ball sealing means are provided at both ends of the valve ball, the envelope on the valve stem within said ball socket accommodating the movement of the ball provided by the resilient seal mounting means at both ends of the valve ball.
References Cited (Backward Citations)
US1807139A
Cited
US2573177A
Cited
US2662722A
Cited
US2837308A
Cited
US2942840A
Cited
US3096966A
Cited
US3108779A
Cited
US3233862A
Cited
GB978601A
Cited
US3111136A
Cited
FR1354265A
Cited
US3241811A
Cited
US3401914A
Cited
US3334650A
Cited
US3356337A
Cited
US3367359A
Cited
US3394915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |