Patent US3770242A successfully refreshed from Google Patents.
US3770242A
Expired / Lapsed
US
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Aerodynamically and hydrodynamically stable torqued butterfly valve and vane
Assignee: Kieley and Mueller Inc
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Filing: 1971-11-16
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Granted: 1973-11-06
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Expires: 1991-11-16
Abstract
Abstract The vane is provided with a baffle or flow guide at the aerodynamic center to effect an approximately equal flow velocity above and below the vane at that point. The differential pressures acting on the vane are approximately balanced for a substantial angular opening portion of the vane while being of reduced magnitude up to about 80* of flow opening until reversing. The dynamic torque on the butterfly valve is substantially reduced by means of the baffle.
Inventors
- 👤 Connor J O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:50
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/222
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
51 words
A vane for a butterfly valve, said vane having a curvilinear periphery, a boss extending across an intermediate portion thereof, and a baffle on one side of said vane extending from an intermediate said boss, said baffle having an outer edge spaced from said periphery and of substantially corresponding arcuate shape.
Claim 2
Dependent Claim
51 words
A vane for a butterfly valve, said vane having a curvilinear periphery, a boss extending across an intermediate portion thereof, and a baffle on one side of said vane extending from an intermediate said boss, said baffle having an outer edge spaced from said periphery and of substantially corresponding arcuate shape.
Claim 3
Dependent Claim
33 words
A vane as set forth in claim 1 wherein said vane has a circular periphery of predetermined diameter and said baffle is of a thickness of about 14 per cent of said diameter.
Claim 4
Dependent Claim
22 words
A vane as set forth in claim 1 wherein said baffle has a maximum thickness located in contiguous relation to said boss.
Claim 5
Dependent Claim
33 words
A vane as set forth in claim 1 wherein said baffle has a maximum thickness located in spaced relation to said boss, said thickness being greater than one-half the thickness of said boss.
Claim 6
Dependent Claim
72 words
A valve comprising a valve body having a passage for the flow of a fluid medium therethrough; a shaft rotatably mounted in said body across said passage; and a vane secured on said shaft within said passage for selectively opening and closing said passage to the flow, said vane having means thereon for permitting an approximately equal flow velocity on opposite sides of said vane with said vane in an open position.
Claim 7
Dependent Claim
72 words
A valve comprising a valve body having a passage for the flow of a fluid medium therethrough; a shaft rotatably mounted in said body across said passage; and a vane secured on said shaft within said passage for selectively opening and closing said passage to the flow, said vane having means thereon for permitting an approximately equal flow velocity on opposite sides of said vane with said vane in an open position.
Claim 8
Dependent Claim
28 words
A valve as set forth in claim 5 wherein said means is a baffle located on one side of said vane at the aerodynamic center of said vane.
Claim 9
Dependent Claim
33 words
A valve as set forth in claim 6 wherein said baffle is of a thickness of about 14 per cent of the diameter of said vane across said passage longitudinally of said shaft.
Claim 10
Dependent Claim
39 words
A valve as set forth in claim 6 wherein said vane includes a boss and said shaft passes through said boss and wherein said baffle extends from an intermediate part of said boss towards the periphery of said vane.
Claim 11
Dependent Claim
31 words
A valve as set forth in claim 8 wherein said baffle has an outer edge spaced from the periphery of said vane and corresponding to the arcuate shape of said periphery.
Claim 12
Dependent Claim
20 words
A valve as set forth in claim 8 wherein said baffle has a maximum thickness located contiguously to said boss.
Claim 13
Dependent Claim
30 words
A valve as set forth in claim 6 wherein said baffle has an arcuate edge spaced from the periphery of said vane and projects from the plane of said vane.
Claim 14
Dependent Claim
59 words
A vane for a butterfly valve, said vane having a curvilinear Periphery, an enlarged portion extending thereacross, a bore passing through said enlarged portion, and a developed surface on one side of said vane extending from said enlarged portion, said developed surface having an outer edge spaced from said periphery and disposed at the aerodynamic center of said vane.
Claim 15
Dependent Claim
59 words
A vane for a butterfly valve, said vane having a curvilinear Periphery, an enlarged portion extending thereacross, a bore passing through said enlarged portion, and a developed surface on one side of said vane extending from said enlarged portion, said developed surface having an outer edge spaced from said periphery and disposed at the aerodynamic center of said vane.
Claim 16
Dependent Claim
34 words
A vane as set forth in claim 12 wherein said vane has a circular periphery of predetermined diameter and said developed surface is of a thickness of about 14 per cent of said diameter.
Claim 17
Dependent Claim
19 words
A vane as set forth in claim 12 wherein said developed surface is in the form of a baffle.
Claim 18
Dependent Claim
36 words
A vane as set forth in claim 12 wherein a flat laminar inducing surface is provided between the maximum height of said boss and the periphery of said vane on the same side as said baffle.
References Cited (Backward Citations)
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |