US3578288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve with a sealing ring having a double swallowtail shape in cross section
Assignee: AS WESTAD ARMATURFABRIK
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Filing: 1969-03-24
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Granted: 1971-05-11
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Expires: 1989-03-24
Abstract
Abstract A butterfly valve comprising a valve housing and a rotatable disc-shaped valve body, sealing means between the valve body and the valve housing with a resilient sealing ring disposed in an undercut groove in the valve housing respectively the valve body and a sealing surface on the valve body respectively the valve housing, cooperating with said sealing ring, the cross-sectional configuration of the sealing ring and the undercut groove being as a substantially double swallowtail.
Inventors
- 👤 Erik Rishovd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2263
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
209 words
A butterfly valve comprising a valve housing, a resilient sealing ring disposed in an undercut groove in the valve housing so that the sealing ring is maintained in place by the undercut portion of the groove, and a disc-shaped valve body rotatably arranged in said valve housing with its axis of rotation displaced with respect to the sealing surface of the sealing ring in the axial direction of the valve housing, wherein the valve body has a wide periPheral sealing surface, a substantial portion of which presents a flat sealing surface portion, and wherein the inner portion of the sealing ring has a substantially swallowtail shape in cross section located in and projecting from the inner portion of the groove, said inner portion of the sealing ring having a wide flat sealing surface adapted to cooperate with the flat sealing surface portion of the valve body, which is at least as wide as that of the sealing ring, the sealing surface portion of the valve body and the sidewall in the outer portion of the groove forming an acute angle into which the outer portion of the sealing ring is pressed in sealing relationship without any substantial deformation of the sealing ring in the outer portion of the groove.
Claim 2
Dependent Claim
209 words
A butterfly valve comprising a valve housing, a resilient sealing ring disposed in an undercut groove in the valve housing so that the sealing ring is maintained in place by the undercut portion of the groove, and a disc-shaped valve body rotatably arranged in said valve housing with its axis of rotation displaced with respect to the sealing surface of the sealing ring in the axial direction of the valve housing, wherein the valve body has a wide periPheral sealing surface, a substantial portion of which presents a flat sealing surface portion, and wherein the inner portion of the sealing ring has a substantially swallowtail shape in cross section located in and projecting from the inner portion of the groove, said inner portion of the sealing ring having a wide flat sealing surface adapted to cooperate with the flat sealing surface portion of the valve body, which is at least as wide as that of the sealing ring, the sealing surface portion of the valve body and the sidewall in the outer portion of the groove forming an acute angle into which the outer portion of the sealing ring is pressed in sealing relationship without any substantial deformation of the sealing ring in the outer portion of the groove.
Claim 3
Dependent Claim
36 words
A butterfly valve, as claimed in claim 1, wherein the outer portion of the sealing ring and the outer portion of the groove in which it is mounted have a substantially swallowtail shape in cross section.
Claim 4
Dependent Claim
40 words
A butterfly valve, as claimed in claim 1, wherein the sealing ring comprises inner and outer portions each having a substantially swallowtail shape in cross section, the sealing ring including a narrow neck portion joining the inner and outer portions.
Claim 5
Dependent Claim
39 words
A butterfly valve, as claimed in claim 1, wherein the inner portion of the sealing ring has a continuous flat, inner peripheral sealing surface and converging flat sides extending outwardly from the respective edges of the flat sealing surface.
References Cited (Backward Citations)
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Cited
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US3197174A
Cited
US3282558A
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US3290001A
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US3356336A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |