US3586290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Garrett Corp
•
Filing: 1969-06-25
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Granted: 1971-06-22
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Expires: 1989-06-25
Abstract
Abstract This butterfly valve has a sealing ring expander on the side which is disposed upstream when the valve is open to resist movement of the sealing ring toward the downstream side and thus reduces the torque required to close the valve.
Inventors
- 👤 Robert A Null
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:55
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/228; F16K1/2285; F16K1/2261
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
A valve mechanism comprising: a. housiNg means providing a fluid passage; b. closure means for controlling fluid flow through said passage having a body supported for pivotal movement between passageclosing and opening positions, said body forming a groove for a seal member; c. seal means relatively loosely supported in said groove and engaging the wall of the passage during closing movement of said body to effect a seal between the passage wall and said body; and d. resilient means engaging said body and said seal means and tending to urge the seal means outwardly of the groove on the upstream side of the body only when the closure body is in a passage-opening position to oppose movement of said seal means into said groove by upstream fluid pressure.
Claim 2
Dependent Claim
128 words
A valve mechanism comprising: a. housiNg means providing a fluid passage; b. closure means for controlling fluid flow through said passage having a body supported for pivotal movement between passageclosing and opening positions, said body forming a groove for a seal member; c. seal means relatively loosely supported in said groove and engaging the wall of the passage during closing movement of said body to effect a seal between the passage wall and said body; and d. resilient means engaging said body and said seal means and tending to urge the seal means outwardly of the groove on the upstream side of the body only when the closure body is in a passage-opening position to oppose movement of said seal means into said groove by upstream fluid pressure.
Claim 3
Dependent Claim
32 words
The valve mechanism of claim 1 in which said resilient means is an expander disposed on the upstream side only of said closure body when such body is in a passage-opening position.
Claim 4
Dependent Claim
42 words
The valve mechanism of claim 2 in which said passage has a circular cross section, said closure body is of disc shape, and said seal means is a split resilient ring having a tendency to expand upon disengagement from the passage wall.
Claim 5
Dependent Claim
34 words
The valve mechanism of claim 3 in which the expander means between the closure body and seal means is a spring element extending substantially half the distance around the periphery of said closure body.
Claim 6
Dependent Claim
16 words
The valve mechanism of claim 4 in which the expander means is of resilient strip material.
Claim 7
Dependent Claim
34 words
The valve mechanism of claim 5 in which the expander means is shaped to alternately engage the bottom wall of the groove in said closure means and the inner surface of said seal means.
Claim 8
Dependent Claim
43 words
The valve mechanism of claim 5 in which the expander means is provided with a plurality of reversely bent corner portions for alternate engagement with the bottom wall of the groove in said closure means and the inner surface of said seal means.
Claim 9
Dependent Claim
39 words
The valve mechanism of claim 5 in which the closure body is provided at predetermined locations with recesses and said expander means has portions shaped for disposition in said recesses to retain said expander means on said closure body.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |