Patent US4330136A successfully refreshed from Google Patents.
US4330136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packing for making closed loop seal
Assignee: Beldam Packing and Rubber Co Ltd
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Filing: 1980-05-13
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Granted: 1982-05-18
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Expires: 2000-05-13
Abstract
Abstract A packing particularly for marine cargo tank lids has a resilient core, a fibrous body enclosing the core, a protective outer layer preferably of PTFE, and an inpervious layer between the body and the core and/or between the body and the outer layer. At least the body is of a weldable thermoplastic material so that the packing can be formed into a closed loop by welding the ends of a length of packing.
Inventors
- 👤 Robert W. J. Henson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:31
CPC Classifications
B; B63; B63B; B63B19/00; B63B19/12; B63B19/26; F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/104; Y; Y10; Y10S; Y10S277/00; Y10S277/921; Y10S277/935; Y10S277/944; Y10S277/945; Y10S277/946; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/1366; Y10T428/1386
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
40 words
A resilient packing comprising a resilient core providing complete recovery after compression, a body of weldable fibrous material enclosing the core, a physically protective outer layer, and a layer of substantially impervious material between the body and the outer layer.
Claim 2
Dependent Claim
40 words
A resilient packing comprising a resilient core providing complete recovery after compression, a body of weldable fibrous material enclosing the core, a physically protective outer layer, and a layer of substantially impervious material between the body and the outer layer.
Claim 3
Dependent Claim
17 words
A packing as claimed in claim 1 in which the protective outer layer is a protective coating.
Claim 4
Dependent Claim
16 words
A packing as claimed in claim 1 in which the protective outer layer is a braid.
Claim 5
Dependent Claim
35 words
A packing as claimed in claim 3, wherein at least one layer of said substantially impervious material is selected from flexible sheet, film, and tape, and is provided between the body and the outer braid.
Claim 6
Dependent Claim
20 words
A packing as claimed in claim 4, wherein said at least one layer of substantially impervious material consists of PTFE.
Claim 7
Dependent Claim
19 words
A packing as claimed in claim 3, 4 or 5, wherein the braid consists of PTFE, polypropylene or asbestos.
Claim 8
Dependent Claim
33 words
A packing as claimed in claim 1 wherein the core has an outer covering of impervious material selected from flexible sheet, film and tape between it and the fibrous body of the packing.
Claim 9
Dependent Claim
14 words
A packing as claimed in claim 7, wherein said outer covering consists of PTFE.
Claim 10
Dependent Claim
17 words
A packing as claimed in claim 1, 4, or 7 wherein the core is composed of rubber.
Claim 11
Dependent Claim
19 words
A packing as claimed in claim 1, 4, or 7 wherein the body consists of thermoplastic fibre or yarn.
Claim 12
Dependent Claim
37 words
A packing as claimed in claim 1, 4, or 7 wherein the form of an endless loop is made by welding together the thermoplastic material of the packing at the ends of a length of the packing.
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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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |