Patent US4124218A successfully refreshed from Google Patents.
US4124218A
Expired / Lapsed
US
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Mechanical seal manufacturing process
Assignee: BW IP International Inc
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Filing: 1977-09-29
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Granted: 1978-11-07
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Expires: 1997-09-29
Abstract
Abstract In mechanical seals adapted to perform in high temperature environments, fragile gaskets characterized by poor elasticity and conformability are used to perfect a seal between adjacent parts. Gaskets may be made of graphite, carbon, asbestos and/or fiberglass containing material. In order to perfect such a seal, gaskets with a parallelogram cross-section are used. They are expanded radially and their cross-section changed when placed between two parts during assembly.
Inventors
- 👤 Robert S. Wentworth, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:17
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38; F16J15/02; F16J15/021; F16J15/022; F16J15/3464; F16J15/3468; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49297; Y10T29/49826; Y10T29/49908; Y10T29/49938
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
In a process of manufacturing a mechanical seal assembly having a pair of seal rings one of which is stationary and one of which is rotatable, and one of which is associated with a cylindrical ferrule which forms a substantially rectangular cross-sectional cavity with its seal ring, the improvement comprising assemblying a seal ring, an annular gasket having a parallelogram shaped cross-section and the cylindrical ferrule with said gasket in the cavity, and radially expanding and deforming said gasket by the application of assembly pressure on the seal ring and ferrule until the gasket assumes substantially the cross-sectional shape of said cavity and substantially fills said cavity.
Claim 2
Dependent Claim
107 words
In a process of manufacturing a mechanical seal assembly having a pair of seal rings one of which is stationary and one of which is rotatable, and one of which is associated with a cylindrical ferrule which forms a substantially rectangular cross-sectional cavity with its seal ring, the improvement comprising assemblying a seal ring, an annular gasket having a parallelogram shaped cross-section and the cylindrical ferrule with said gasket in the cavity, and radially expanding and deforming said gasket by the application of assembly pressure on the seal ring and ferrule until the gasket assumes substantially the cross-sectional shape of said cavity and substantially fills said cavity.
Claim 3
Dependent Claim
23 words
In a process as recited in claim 1 in which said gasket is constructed of fragile material characterized by poor elasticity and conformability.
Claim 4
Dependent Claim
35 words
In a process as recited in claim 2 in which said gasket material is especially usable in high temperature environments and is selected from the group consisting of graphite, carbon, asbestos and fiberglass containing materials.
Claim 5
Dependent Claim
77 words
In a process of manufacturing a mechanical device of at least a pair of parts with a fragile gasket therebetween, said parts defining a substantially rectangular cross-sectional cavity to receive said gasket, the improvement comprising assemblying said parts and an annular fragile gasket having a parallelogram shaped cross-section in said cavity and radially expanding and deforming said gasket by the application of pressure on the parts until the gasket assumes substantially the cross-sectional shape of said cavity.
Claim 6
Dependent Claim
77 words
In a process of manufacturing a mechanical device of at least a pair of parts with a fragile gasket therebetween, said parts defining a substantially rectangular cross-sectional cavity to receive said gasket, the improvement comprising assemblying said parts and an annular fragile gasket having a parallelogram shaped cross-section in said cavity and radially expanding and deforming said gasket by the application of pressure on the parts until the gasket assumes substantially the cross-sectional shape of said cavity.
Claim 7
Dependent Claim
22 words
In a process as recited in claim 4 in which said gasket is constructed of material characterized by poor elasticity and conformability.
Claim 8
Dependent Claim
35 words
In a process as recited in claim 5 in which said gasket material is especially usable in high temperature environments and is selected from the group consisting of graphite, carbon, asbestos and fiberglass containing materials.
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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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |