Patent US3880485A successfully refreshed from Google Patents.
Patent US3801066A successfully refreshed from Google Patents.
US3801066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic butterfly valve
Assignee: Neles Jamesbury Inc
•
Filing: 1971-07-01
•
Granted: 1974-04-02
•
Expires: 1991-07-01
Abstract
Abstract Disclosed is a butterfly valve particularly adapted for service with cryogenic fluids at temperatures down to -320* F and lower wherein a butterfly valve is provided with a seat that has a configuration that permits the seat to shrink upon exposure to lowered temperatures and to engage a protrusion in the valve housing. The forces generated by the shrinkage of the seat and the engagement with the protrusion cause the seat to deform in a controlled manner and maintain sealing engagement with the butterfly disc despite the dimensional changes of the valve components attributable to exposure to the cryogenic fluid.
Inventors
- 👤 M Miles
- 👤 J Donnelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:36
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/228; F16K1/2285
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
123 words
A rotary valve comprising a valve housing with a flow channel passing therethrough a valve closure member rotatably mounted in said housing with a sealing surface circumscribing said member, and annular seat means disposed to cooperate with said sealing surface to interrupt flow through said valve when said closure member is rotated into the closed position, said annular seat means mounted with respect to said sealing surface to permit controlled shrinkage in the radially inward direction of said seat means upon exposure to low temperature, and means tending to pivot at least a portion of said seat ring toward said sealing surface with a controlled movement in response to forces generated by said shrinkage of said seat means upon exposure to low temperature.
Claim 2
Dependent Claim
123 words
A rotary valve comprising a valve housing with a flow channel passing therethrough a valve closure member rotatably mounted in said housing with a sealing surface circumscribing said member, and annular seat means disposed to cooperate with said sealing surface to interrupt flow through said valve when said closure member is rotated into the closed position, said annular seat means mounted with respect to said sealing surface to permit controlled shrinkage in the radially inward direction of said seat means upon exposure to low temperature, and means tending to pivot at least a portion of said seat ring toward said sealing surface with a controlled movement in response to forces generated by said shrinkage of said seat means upon exposure to low temperature.
Claim 3
Dependent Claim
29 words
The valve of claim 1 wherein said valve closure member is a butterfly disc and said sealing surface circumscribing said member is disposed about the edge of said disc.
Claim 4
Dependent Claim
57 words
The valve of claim 2 wherein said sealing surface is a portion of a converging surface, said annular seat means has a complementarily shaped sealing surface thereon, and said disc sealing surface and said annular seat means sealing surface are oriented to each other to produce an interference fit when said disc is in said closed position.
Claim 5
Dependent Claim
49 words
The valve of claim 3 wherein said shaft and said valve housing are extended so that a bonnet on said valve is displaced from said disc by an amount to protect an actuator on said bonnet from the temperature effects of the fluid to be controlled by the valve.
Claim 6
Dependent Claim
30 words
The valve of claim 2 wherein said annular seat means is carried in a groove formed in said housing, and said groove has a first sidewall and a second sidewall.
Claim 7
Dependent Claim
19 words
The valve of claim 5 wherein said first sidewall, when viewed in cross section, has a lug projecting therefrom.
Claim 8
Dependent Claim
30 words
The valve of claim 6 wherein said means tending to pivot said seat means toward said sealing surface includes said lug and a cooperating notch formed in said seat means.
Claim 9
Dependent Claim
38 words
The valve of claim 7 wherein said notch is wider than said lug whereby a clearance space exists between said seat ring and said notch on both sides of said notch when said valve is at ambient temperature.
Claim 10
Dependent Claim
46 words
The valve of claim 8 wherein said controlled shrinkage is such that, below ambient temperature, the radially outward side of said notch contacts the facing side of said lug and the resulting stresses tend to pivot a portion of said seat means in the described manner.
Claim 11
Dependent Claim
44 words
The valve of claim 8, wherein the thickness of said annular seat means is dimensioned with respect to the width of said groove so as to permit relative movement between said annular seat means and said groove during shrinkage of said annular seat means.
Claim 12
Dependent Claim
68 words
The valve of claim 10, wherein the mounting of said annular seat means includes the thickness of said annular seat means at said notch being dimensioned so that a slight interference fit is provided between said lug and said notch to assure sealing action and, at the same time, to permit relative motion between said annular seat means and said housing during shrinking of said annular seat means.
Claim 13
Dependent Claim
43 words
The valve of claim 11, wherein said controlled shrinkage is such that, below ambient temperature, the radially outward side of said notch contacts the facing side of said lug so as to pivot a portion of said seat means toward said sealing surface.
Claim 14
Dependent Claim
64 words
The valve of claim 12, wherein said sealing surface is a portion of a converging surface, said annular seat means having a complementary-shaped sealing surface thereon, and said valve closure member sealing surface and said annular seat means sealing surface being oriented with respect to each other so as to produce an interference fit when said valve closure member is in said closed position.
Claim 15
Dependent Claim
108 words
A butterfly valve seat ring for use in cryogenic applications comprising, when viewed in cross section, a heel portion adapted to be engirded in sliding relationship in a groove, a lip portion with a sealing surface thereon and adapted to engage a sealing surface of a valve closure member and a notch formed in the side of said seat ring, the radially outward side surface of said notch constituting means that, in cooperation with a lug member disposed within said notch, will tend to pivot said lip portion of said seat ring toward said sealing surface during shrinkage of said seat ring induced by exposure to low temperatures.
Claim 16
Dependent Claim
108 words
A butterfly valve seat ring for use in cryogenic applications comprising, when viewed in cross section, a heel portion adapted to be engirded in sliding relationship in a groove, a lip portion with a sealing surface thereon and adapted to engage a sealing surface of a valve closure member and a notch formed in the side of said seat ring, the radially outward side surface of said notch constituting means that, in cooperation with a lug member disposed within said notch, will tend to pivot said lip portion of said seat ring toward said sealing surface during shrinkage of said seat ring induced by exposure to low temperatures.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |