US4082105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve stem packing assembly with temperature responsive seal
Assignee: Cameron International Corp
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Filing: 1976-12-17
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Granted: 1978-04-04
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Expires: 1996-12-17
Abstract
Abstract There is disclosed a valve having means for providing a secondary stem seal in the event the primary packing for the stem is destroyed by heat.
Inventors
- 👤 Herbert Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:39
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/164; F16K; F16K41/00; F16K41/02; F16K41/023; Y; Y10; Y10S; Y10S277/00; Y10S277/931; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
193 words
A valve, comprising a valve body having a passageway therethrough and an opening therein connecting the passageway with the exterior of the body, a closure member mounted within the body for opening and closing the passageway, a stem extending through the opening and connecting with the closure member for moving it between opened and closed positions, said stem being spaced from the opening to define an annular space therebetween, a packing of resilient material disposed within the space for sealing between the stem and the opening, at least one relatively rigid, spring-like annular element disposed within said space, and means holding each said element in a distorted shape in which its outside diameter is closely received within the opening and its inside diameter is greater than and substantially concentric with the outside diameter of the stem, said holding means being fusible at a desired temperature to permit each said annular element to return toward an undistorted shape in which its inside diameter is forced against the outside diameter of the stem and its outside diameter is forced against the opening, whereby the space may be closed despite destruction of the packing by heat.
Claim 2
Dependent Claim
193 words
A valve, comprising a valve body having a passageway therethrough and an opening therein connecting the passageway with the exterior of the body, a closure member mounted within the body for opening and closing the passageway, a stem extending through the opening and connecting with the closure member for moving it between opened and closed positions, said stem being spaced from the opening to define an annular space therebetween, a packing of resilient material disposed within the space for sealing between the stem and the opening, at least one relatively rigid, spring-like annular element disposed within said space, and means holding each said element in a distorted shape in which its outside diameter is closely received within the opening and its inside diameter is greater than and substantially concentric with the outside diameter of the stem, said holding means being fusible at a desired temperature to permit each said annular element to return toward an undistorted shape in which its inside diameter is forced against the outside diameter of the stem and its outside diameter is forced against the opening, whereby the space may be closed despite destruction of the packing by heat.
Claim 3
Dependent Claim
24 words
A valve of the character defined in claim 1, wherein there are a plurality of said annular elements arranged in stacked, substantially coaxial relationship.
Claim 4
Dependent Claim
24 words
A valve of the character defined in claim 2, wherein said holding means comprises a fusible material between adjacent faces of the annular elements.
Claim 5
Dependent Claim
17 words
A valve of the character defined in claim 1, wherein each annular element is a Belleville spring.
Claim 6
Dependent Claim
18 words
A valve of the character defined in claim 2, wherein all of said annular elements are Belleville springs.
Claim 7
Dependent Claim
18 words
A valve of the character defined in claim 3, wherein all of said annular elements are Belleville springs.
Claim 8
Dependent Claim
150 words
A bonnet assembly for a valve, comprising a body having an opening therethrough, an operating stem extending through the opening to define an annular space therebetween, a packing of resilient material disposed within the space for sealing between the stem and the opening, at least one relatively rigid, spring-like annular element disposed within said space, and means holding each said element in a distorted shape in which its outside diameter is closely received within the opening and its inside diameter is greater than and substantially concentric with the outside diameter of the stem, said holding means being fusible at a desired temperature to permit each said annular element to return toward an undistorted shape in which its inside diameter is forced against the outside diameter of the stem and its outside diameter is forced against the opening, whereby the space may be closed despite destruction of the packing by heat.
Claim 9
Dependent Claim
150 words
A bonnet assembly for a valve, comprising a body having an opening therethrough, an operating stem extending through the opening to define an annular space therebetween, a packing of resilient material disposed within the space for sealing between the stem and the opening, at least one relatively rigid, spring-like annular element disposed within said space, and means holding each said element in a distorted shape in which its outside diameter is closely received within the opening and its inside diameter is greater than and substantially concentric with the outside diameter of the stem, said holding means being fusible at a desired temperature to permit each said annular element to return toward an undistorted shape in which its inside diameter is forced against the outside diameter of the stem and its outside diameter is forced against the opening, whereby the space may be closed despite destruction of the packing by heat.
Claim 10
Dependent Claim
24 words
A bonnet of the character defined in claim 7, wherein there are a plurality of said annular elements arranged in stacked, substantially coaxial relationship.
Claim 11
Dependent Claim
24 words
A bonnet of the character defined in claim 8, wherein said holding means comprises a fusible material between adjacent faces of the annular elements.
Claim 12
Dependent Claim
17 words
A valve of the character defined in claim 7, wherein each annular element is a Belleville spring.
Claim 13
Dependent Claim
18 words
A valve of the character defined in claim 8, wherein all of said annular elements are Belleville springs.
Claim 14
Dependent Claim
18 words
A valve of the character defined in claim 9, wherein all of said annular elements are Belleville springs.
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) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |