US3784157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve stem seal energizer
Assignee: FMC Corp
•
Filing: 1972-05-15
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Granted: 1974-01-08
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Expires: 1992-05-15
Abstract
Abstract A butterfly valve with an improved valve stem seal that maintains a positive seal with a valve disc. In the valve, a removeable valve seat assembly fitted within the valve body is provided with rigid sleeve-type seat energizers disposed about the valve stems to compress liner material of the seat assembly into sealing contact with adjacent valve disc surface portions. Each seat energizer is disposed in a radial bore in the valve seat assembly with its radially outermost end pushed radially inward by the valve body to compress seat liner material between the valve disc and the radially innermost end of the seat energizer.
Inventors
- 👤 F Wenglar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:16
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2263; F16K1/2265; F16K1/2268; Y; Y10; Y10T; Y10T137/00; Y10T137/7504
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
196 words
A valve comprising, in combination, a valve body, a valve seat assembly axially slidable into and fitted within the valve body, a valve disc disposed in the valve seat assembly, a pivot stem attached to the valve disc, said valve seat assembly including an annular valve seat member having a liner thereon that includes elastomeric material, a radial bore in and extending entirely through the seat member, a rigid sleeve disposed in the radial bore, the sleeve being fitted about the pivot stem, a body portion of the liner forming a through bore in registry with the seat member bore, the length of said sleeve being greater than the axial dimension of the seat member bore by an amount not exceeding the amount the liner''s body can be compressed, said sleeve terminating in a radially outward end that bears against the inside periphery of the valve body and having a radially inward end that bears against a surface zone of the body portion of the liner in such manner as to compress the body portion of the liner between a radially adjacent portion of the valve disc periphery and the radially inward end of the sleeve.
Claim 2
Dependent Claim
196 words
A valve comprising, in combination, a valve body, a valve seat assembly axially slidable into and fitted within the valve body, a valve disc disposed in the valve seat assembly, a pivot stem attached to the valve disc, said valve seat assembly including an annular valve seat member having a liner thereon that includes elastomeric material, a radial bore in and extending entirely through the seat member, a rigid sleeve disposed in the radial bore, the sleeve being fitted about the pivot stem, a body portion of the liner forming a through bore in registry with the seat member bore, the length of said sleeve being greater than the axial dimension of the seat member bore by an amount not exceeding the amount the liner''s body can be compressed, said sleeve terminating in a radially outward end that bears against the inside periphery of the valve body and having a radially inward end that bears against a surface zone of the body portion of the liner in such manner as to compress the body portion of the liner between a radially adjacent portion of the valve disc periphery and the radially inward end of the sleeve.
Claim 3
Dependent Claim
22 words
The combination set forth in claim 1 wherein the radially outward end of the sleeve is bevelled about its peripheral end surface.
Claim 4
Dependent Claim
42 words
The combination set forth in claim 1 wherein the liner is formed by a first liner element composed of relatively elastic material, and by a second liner element composed of material that is less elastic than that of the first liner element.
Claim 5
Dependent Claim
37 words
The combintaion set forth in claim 1 where in the sleeve includes a radially inwardly directed flange at its radially inward end defining a circular hole therethrough sized to accommodate therein a portion of the pivot stem.
Claim 6
Dependent Claim
46 words
The combination set forth in claim 1 wherein the outer periphery of the seat member is of such curva-ture that diametrically opposed portions of the radially outward end of the sleeve will extend radially outward beyond corresponding, diametrically opposed edge portions of the seat member''s bore.
Claim 7
Dependent Claim
187 words
A valve seat assembly, which can be slid axially into fitted position in a valve body, comprising, in combination, an annular valve seat member having a liner on the inside periphery thereof, the seat member having a body portion defining a radial bore that extends from the outside periphery to the inside periphery of the seat member, the liner having a body portion defining a radial bore that extends through the liner and is in registry with the seat member radial bore, the liner radial bore being of a diameter less than the diameter of the seat member radial bore, a rigid cylIndrical sleeve fitted within the seat member radial bore with its radially inward end contacting a surface zone of the aforementioned body portion of the liner and with at least two diametrically opposed peripheral portions of its radially outward end extending radially outward and beond surrounding diametrically opposed edge portions of the seat member radial bore, the length of said sleeve being greater than the axial dimension of the seat member bore by an amount not exceeding the amount the liner''s body can be compressed.
Claim 8
Dependent Claim
187 words
A valve seat assembly, which can be slid axially into fitted position in a valve body, comprising, in combination, an annular valve seat member having a liner on the inside periphery thereof, the seat member having a body portion defining a radial bore that extends from the outside periphery to the inside periphery of the seat member, the liner having a body portion defining a radial bore that extends through the liner and is in registry with the seat member radial bore, the liner radial bore being of a diameter less than the diameter of the seat member radial bore, a rigid cylIndrical sleeve fitted within the seat member radial bore with its radially inward end contacting a surface zone of the aforementioned body portion of the liner and with at least two diametrically opposed peripheral portions of its radially outward end extending radially outward and beond surrounding diametrically opposed edge portions of the seat member radial bore, the length of said sleeve being greater than the axial dimension of the seat member bore by an amount not exceeding the amount the liner''s body can be compressed.
Claim 9
Dependent Claim
15 words
The combination set forth in claim 6 wherein the sleeve is made of metallic material.
Claim 10
Dependent Claim
17 words
The combination set forth in claim 6 wherein the sleeve is bevelled at its radially outward end.
Claim 11
Dependent Claim
50 words
The combination set forth in claim 6 wherein the outside periphery of the seat member has a cylindrical curvature such that at least diametrically opposed peripheral portions of the radially outward end of the sleeve lie radially inward of surrounding diametrically opposed edge portions of the seat member radial bore.
Claim 12
Dependent Claim
51 words
The combination set forth in claim 6 wherein the liner is comprised of a first liner element adjacent the seat member and a second liner element adjacent the first liner element, and wherein the material of the first liner element has greater elasticity than the material of the second liner element.
Claim 13
Dependent Claim
25 words
The combination set forth in claim 10 wherein the second liner element includes a tubular body portion that lines the first liner element''s radial bore.
Claim 14
Dependent Claim
51 words
The combination set forth in claim 10 wherein the second liner element includes an annular body portion that is contiguous with the remainder of the second liner element and that provides an annular body region surrounding the first liner element''s radial bore to provide the aforementioned surface zone of the liner.
Claim 15
Dependent Claim
16 words
The combination set forth in claim 10 wherein the first liner is made of elastomeric material.
Claim 16
Dependent Claim
76 words
The combination set forth in claim 10 wherein the outside periphery of the seat member has a cylindrical curvature and wherein the length end-to-end of the sleeve relative to the length end-to-end of the seat member radial bore is such that at least diametrically opposed peripheral portions of the radially outward end of the sleeve lie radially outward of surrounding diametrically opposed edge portions of the seat member radial bore which are in peripherally spaced relation.
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |