Patent US4286769A successfully refreshed from Google Patents.
US4286769A
Expired / Lapsed
US
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Valve seat
Assignee: Somas Ventiler AB
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Filing: 1979-10-23
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Granted: 1981-09-01
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Expires: 1999-10-23
Abstract
Abstract A valve seat contains a seat ring (12) with flat, parallel side faces (19, 20). The seat ring consists of steel or possibly of PTFE. When the valve is being shut by a throttle (1), a sealing surface of the throttle is pressed against the seat ring which adopt itself as to form and position to the mean line of the throttle, and the seat ring is displaced in a groove (18) in the plane of the seat. A couple of spring washers (10, 11) sealingly engage the parallel side faces of the seat ring. When the throttle is reopened the spring washers secure the seat ring in its position.
Inventors
- 👤 Folke H. Hubertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:03
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2263; F16K1/228
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
247 words
In a throttle valve comprising a valve housing having an annular recess therein, a throttle member pivotally movable in the valve housing and having an annular seal face throttle member seal face, the improvement comprising said valve seat including resilient means located in said annular recess and defining an annular groove, and a radially movable seat ring located in said annular groove, said seat ring being made of a stiff material but with sufficient radial direction resiliency such that when subject to a radial load from contact with the throttle member seal face said seat ring may be displaced and/or deformed in the radial direction, said resilient means and said seat ring cooperating so that when said ring moves in a radial direction under said radial load said resilient means sealingly engages said seat ring and when said radial load is removed from said seat ring said resilient means maintains said seat ring substantially in the displaced shape and position, so that wear between said seat ring and said seal face is minimized in that when said seat ring is circular and said seal face is circular, the seat ring is displaceable into alignment with said seal face and is maintained in the aligned position when said radial load is removed therefrom, and when said seat ring is circular and said seal face is elliptical, said seat ring is deformed into an elliptical shape and is maintained in said elliptical shape when said load is removed therefrom.
Claim 2
Dependent Claim
247 words
In a throttle valve comprising a valve housing having an annular recess therein, a throttle member pivotally movable in the valve housing and having an annular seal face throttle member seal face, the improvement comprising said valve seat including resilient means located in said annular recess and defining an annular groove, and a radially movable seat ring located in said annular groove, said seat ring being made of a stiff material but with sufficient radial direction resiliency such that when subject to a radial load from contact with the throttle member seal face said seat ring may be displaced and/or deformed in the radial direction, said resilient means and said seat ring cooperating so that when said ring moves in a radial direction under said radial load said resilient means sealingly engages said seat ring and when said radial load is removed from said seat ring said resilient means maintains said seat ring substantially in the displaced shape and position, so that wear between said seat ring and said seal face is minimized in that when said seat ring is circular and said seal face is circular, the seat ring is displaceable into alignment with said seal face and is maintained in the aligned position when said radial load is removed therefrom, and when said seat ring is circular and said seal face is elliptical, said seat ring is deformed into an elliptical shape and is maintained in said elliptical shape when said load is removed therefrom.
Claim 3
Dependent Claim
29 words
Valve of claim 1, wherein said resilient means comprises a pair of spring washers located on each side of said seat ring and sealingly pressing against said seat ring.
Claim 4
Dependent Claim
23 words
Valve of claim 2, wherein said spring washers define the shape of the annular groove in which said seat ring is displaceably carried.
Claim 5
Dependent Claim
34 words
Valve of any one of claims 1, 2 or 3, wherein said seat ring is comparatively flat with an extension in the radial direction which is at least twice that of the axial direction.
Claim 6
Dependent Claim
53 words
Valve of any one of claims 2 or 3, wherein the spring washers are pressed out by the seat ring during mounting of said seat ring, said seat ring has parallel side faces, and an inner portion of said spring washers resiliently sealingly presses against said parallel side faces of said seat ring.
Claim 7
Dependent Claim
17 words
Valve of claim 5, wherein said seat ring is made of steel or other metal or alloy.
Claim 8
Dependent Claim
17 words
Valve of claim 5, wherein said seat ring is at least partly made of stiff plastic material.
Claim 9
Dependent Claim
65 words
Valve of claim 1, wherein said seat ring is also deformed in the radial direction when subject to a radial load from contact with the throttle member seal face, and wherein said resilient means and said seat ring cooperate so than when said radial load is removed from said seat ring the resilient means maintain said seat ring substantially in the deformed shape and position.
Claim 10
Dependent Claim
244 words
A throttle valve comprising a valve housing having an annular recess therein, a throttle member pivotably movable in the valve housing, said throttle member having an annular seal face, a pair of spring means in said annular recess, said spring means defining an annular groove thereinbetween, a seat ring located in said annular groove between said spring means and made of a stiff material but with sufficient radial direction resiliency such that the shape of the seat ring when subjected to a radial load from contact with said throttle member seal face may be radially displaced in said groove between said spring means, said spring means and said seat ring cooperating so that said spring means sealingly engage said seat ring when said seat ring moves in said groove between said spring means, and when said radial load is removed from said seat ring said spring means maintains said seat ring substantially in the displaced position thereby minimizing wear between said seat ring and said throttle member seal face, in that when said seat ring is circular and said seal face is circular, the seat ring is displaceable into alignment with said seal face and is maintained in the aligned position when said radial load is removed therefrom, and when said seat ring is circular and said seal face is elliptical, said seat ring is deformed into an elliptical shape and is maintained in said elliptical shape when said radial load is removed therefrom.
Claim 11
Dependent Claim
244 words
A throttle valve comprising a valve housing having an annular recess therein, a throttle member pivotably movable in the valve housing, said throttle member having an annular seal face, a pair of spring means in said annular recess, said spring means defining an annular groove thereinbetween, a seat ring located in said annular groove between said spring means and made of a stiff material but with sufficient radial direction resiliency such that the shape of the seat ring when subjected to a radial load from contact with said throttle member seal face may be radially displaced in said groove between said spring means, said spring means and said seat ring cooperating so that said spring means sealingly engage said seat ring when said seat ring moves in said groove between said spring means, and when said radial load is removed from said seat ring said spring means maintains said seat ring substantially in the displaced position thereby minimizing wear between said seat ring and said throttle member seal face, in that when said seat ring is circular and said seal face is circular, the seat ring is displaceable into alignment with said seal face and is maintained in the aligned position when said radial load is removed therefrom, and when said seat ring is circular and said seal face is elliptical, said seat ring is deformed into an elliptical shape and is maintained in said elliptical shape when said radial load is removed therefrom.
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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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |