Patent US1604565A successfully refreshed from Google Patents.
Patent US4364982A successfully refreshed from Google Patents.
US4364982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaskets
Assignee: DAN LOC INVESTMENTS Inc
•
Filing: 1980-12-05
•
Granted: 1982-12-21
•
Expires: 2000-12-05
Abstract
Abstract A spiral wound gasket is provided with an inner supporting ring coated with an elastomer material; it is preferably also provided with a plain metal outer guide ring.
Inventors
- 👤 Colin Gee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:04
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/125; F16L; F16L23/00; F16L23/16; F16L23/18; Y; Y10; Y10T; Y10T428/00; Y10T428/21; Y10T428/215; Y10T428/24; Y10T428/24628; Y10T428/24777; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
In a spiral wound gasket the improvement comprising the provision of an inner ring coated with an elastomer material, said inner ring lying radially inwardly of and coplanar with said gasket, said inner ring being in the form of an annulus having two opposed substantially flat faces as the major faces of said annulus, and on at least one of said major faces the elastomer material is formed into a sealing profile.
Claim 2
Dependent Claim
72 words
In a spiral wound gasket the improvement comprising the provision of an inner ring coated with an elastomer material, said inner ring lying radially inwardly of and coplanar with said gasket, said inner ring being in the form of an annulus having two opposed substantially flat faces as the major faces of said annulus, and on at least one of said major faces the elastomer material is formed into a sealing profile.
Claim 3
Dependent Claim
23 words
The spiral wound gasket of claim 1 wherein said sealing profile is constituted by a series of concentric ridges of V shaped cross-section.
Claim 4
Dependent Claim
41 words
The spiral wound gasket of claim 1 or 2, wherein the radially-outermost edge of said inner ring is shaped to engage the inner circumference of the associated spiral wound gasket, whereby said ring is retained in coplanar relation to said gasket.
Claim 5
Dependent Claim
22 words
The spiral wound gasket of claim 3 wherein said shaping is constituted by an edge portion integrally moulded from said elastomer material.
Claim 6
Dependent Claim
31 words
The spiral wound gasket of claim 3 wherein said shaping is provided by profiling the edge of the inner ring prior to applying a substantially uniform coating of elastomer material thereto.
Claim 7
Dependent Claim
60 words
In a spiral wound gasket, the improvement comprising an inner ring having two opposed substantially flat faces as the major faces thereto, the entire inner ring coated with an elastomer material, said inner ring shaped to engage the inner circumference of the associated spiral wound gasket such that the inner ring lies radially inwardly of and coplanar with said gasket.
Claim 8
Dependent Claim
60 words
In a spiral wound gasket, the improvement comprising an inner ring having two opposed substantially flat faces as the major faces thereto, the entire inner ring coated with an elastomer material, said inner ring shaped to engage the inner circumference of the associated spiral wound gasket such that the inner ring lies radially inwardly of and coplanar with said gasket.
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) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |