Patent US2952998A successfully refreshed from Google Patents.
Patent US3583668A successfully refreshed from Google Patents.
US3583668A
Expired / Lapsed
US
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Tight shutoff butterfly valve assembly
Assignee: Neles Jamesbury Oy
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Filing: 1969-08-14
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Granted: 1971-06-08
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Expires: 1989-08-14
Abstract
Abstract A tight shutoff butterfly valve assembly for controlling the flow of air, gas, oil or other fluids such as pulp or paper stocks and for providing a completely tight seal to the flow even at high differential pressure wherein the assembly includes a two-piece valve body with a centrally mounted circular vane therein and wherein an annular seat is located in a dovetail groove within the valve body, the seat having an inner surface of a first dimension extending into the passageway formed by the valve body, an outer surface of a second and larger linear dimension than the dimension of the inner surface and two side surfaces extending between the inner and outer surfaces of the seat. The outer surface of the seat has a groove for facilitating the deformation of the seat upon closure of the vane and upon contact by the vane with the inner surface of the seat. The seat also includes two generally U-shaped portions which fit around the shaft of the valve assembly to facilitate easy removal and replacement of the seat without requiring the disassembly of the vane and the shaft. The butterfly valve may also be placed in assembly at the end of a first pipe and a vanstone ring flange may be removably bolted to the valve so as to enable the optional connection of a second pipe to the valve.
Inventors
- 👤 Juha Antti E Nelimarkka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:55
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2263
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
322 words
A tight shutoff butterfly valve for controlling the flow of air, gas, oil or other fluids such as pulp or paper stocks and for providing a completely tight seal to said flow even at high differential pressure, wherein said valve comprises: a valve body having a flow passageway therethrough and a dovetail groove opening into and surrounding said passageway; a shaft extending through said valve body in a direction substantially perpendicular to said flow; a substantially circular vane member mounted on said shaft and within said valve body for rotation within said body with said shaft; a generally annular seat of relatively small cross section in removable and contiguous relationship with said valve body within said dovetail groove; said seat having an inner circular surface of a first dimension extending into said passageway for completely engaging the outer portion of said circular vane member when the valve is closed, an outer surface of a second and larger linear dimension than said first dimension, and two side surfaces extending between said inner and outer surfaces; said outer surface having a groove therein for facilitating the deformation of said seat upon closure of said vane member and upon contact by said vane member with said inner surface of said seat, said groove being defined by a first surface substantially parallel with said inner surface and recessed from said outer surface and further defined by a pair of sidewalls substantially in respective parallel relationship with said side surfaces of said seat; said seat further including two generally U-shaped portions which fit around said shaft to facilitate easy removal and replacement of said seat; said U-shaped portions having an inner surface which lies in the plane of a sphere for improving the sealing qualities of said seat; and said seat further having two sloping surfaces adjacent each of said U-shaped portions for joining said first surface of said groove with the outer surface of said seat.
Claim 2
Dependent Claim
322 words
A tight shutoff butterfly valve for controlling the flow of air, gas, oil or other fluids such as pulp or paper stocks and for providing a completely tight seal to said flow even at high differential pressure, wherein said valve comprises: a valve body having a flow passageway therethrough and a dovetail groove opening into and surrounding said passageway; a shaft extending through said valve body in a direction substantially perpendicular to said flow; a substantially circular vane member mounted on said shaft and within said valve body for rotation within said body with said shaft; a generally annular seat of relatively small cross section in removable and contiguous relationship with said valve body within said dovetail groove; said seat having an inner circular surface of a first dimension extending into said passageway for completely engaging the outer portion of said circular vane member when the valve is closed, an outer surface of a second and larger linear dimension than said first dimension, and two side surfaces extending between said inner and outer surfaces; said outer surface having a groove therein for facilitating the deformation of said seat upon closure of said vane member and upon contact by said vane member with said inner surface of said seat, said groove being defined by a first surface substantially parallel with said inner surface and recessed from said outer surface and further defined by a pair of sidewalls substantially in respective parallel relationship with said side surfaces of said seat; said seat further including two generally U-shaped portions which fit around said shaft to facilitate easy removal and replacement of said seat; said U-shaped portions having an inner surface which lies in the plane of a sphere for improving the sealing qualities of said seat; and said seat further having two sloping surfaces adjacent each of said U-shaped portions for joining said first surface of said groove with the outer surface of said seat.
Claim 3
Dependent Claim
17 words
The valve of claim 1 wherein said shaft is mounted on the centerline of said valve body.
Claim 4
Dependent Claim
74 words
The valve of claim 2 wherein said U-shaped portions are tapered in cross section so that the inner surfaces thereof adjacent to said shaft are of a smaller linear dimension in the direction parallel with said shaft than the corresponding linear dimensions of said outer surfaces Thereof which are contiguous with said valve body and wherein the inner surfaces of said U-shaped portions is curved to conform to the surface of said valve shaft.
Claim 5
Dependent Claim
39 words
The valve of claim 3 wherein said valve body is comprised of two separable portions whereby said seat may be easily replaced by merely removing one of said portions without requiring the disassembly of said valve and said shaft.
Claim 6
Dependent Claim
181 words
The butterfly valve of claim 4 in assembly at the end of a first pipe wherein said valve body includes a flange integral with one of said portions thereof, said flange being bolted to said first pipe; said valve body flange having bolt holes therein circumferentially spaced apart from one another by a distance of one-half a standard bolt spacing and said first pipe being bolted to said valve body flange at a first series of said bolt holes respectively spaced apart by a standard bolt spacing; a vanstone ring flange removably bolted to said valve body flange to enable the optional connection of a second pipe to said valve at the side of said valve opposite to that which is adjacent to said first pipe; said vanstone ring flange being removably bolted to said valve body flange at a second series of said bolt holes respectively spaced apart by a standard bolt spacing whereby the bolts which hold said valve to said first pipe do not interfere with the bolts which removably hold said vanstone ring flange to said valve.
Claim 7
Dependent Claim
22 words
The valve of claim 5 wherein said outer surfaces of said U-shaped portions are oriented toward the high-pressure side of said flow.
Claim 8
Dependent Claim
34 words
The valve of claim 4 wherein the width of said inner surface of said groove is in the range of one-fourth to three-fourths of the linear dimension of said outer surface of said seat.
Claim 9
Dependent Claim
225 words
The butterfly valve of claim 4 in assembly at the end of a first pipe wherein said valve body includes first and second flanges integral with each of said portions thereof, said first flange being bolted to said first pipe; a vanstone ring flange removably bolted to the second flange to enable the optional connection of a second pipe to said valve at the side of said valve opposite to that which is adjacent to said first pipe; each of said valve body flanges having bolt holes therein circumferentially spaced apart from one another by a distance of one-half a standard bolt spacing; a first plurality of bolts or other fastening means fastening said first pipe to said first valve body flange at a first series of said bolt holes respectively spaced apart by a standard bolt spacing and wherein said first plurality of bolts pass through a first series of holes in said second flange respectively spaced apart by a standard bolt spacing; and a second plurality of bolts or other fastening means fastening said vanstone ring flange to said second flange at a second series of said bolt holes respectively spaced apart by a standard bolt spacing and wherein said second plurality of bolts pass through a second series of holes in said first flange respectively spaced apart by a standard bolt spacing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |