Patent US4708351A successfully refreshed from Google Patents.
US4708351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed joint including water-absorptive, water-swelling coating at joint interface site for using leakage to repair leaks
Assignee: Toyota Motor Corp
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Filing: 1985-09-16
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Granted: 1987-11-24
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Expires: 2005-09-16
Abstract
Abstract A sealing layer that seals the gap between the body or window glass and the weatherstrip attached to the door, window, trunk, roof side, etc. of an automobile, and also to a weatherstrip, automotive body, and glass plate provided with said sealing layer. The water-absorbing material swells upon absorption of water, sealing the fitting part of the weatherstrip. The water-absorbing material is made of a mixture of a water-absorbing polymer and rubber or synthetic resin. The sealing layer is formed on the fitting part of the weatherstrip, body, or window glass at which the weatherstrip is fitted to the automotive body or the window glass is fitted to the weatherstrip.
Inventors
- 👤 Masanori Midooka
- 👤 Takashi Kubo
- 👤 Atsunobu Fujikawa
- 👤 Masanori Motoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:59
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1015; B; B60; B60J; B60J10/00; B60J10/15; B60J10/17; B60J10/20; B60J10/24; B60J10/30; B60J10/34; B60J10/70; B60J10/74; B60J10/80; C09K2003/1034; C09K2003/104; C09K2200/00; C09K2200/06; C09K2200/0607; C09K2200/0612; C09K2200/0615; C09K2200/0617; C09K2200/062; C09K2200/0625; C09K2200/0635; Y; Y10; Y10S; Y10S277/00; Y10S277/921; Y10S277/934; Y10S277/935; Y10S277/944; Y10T; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24198; Y10T428/29; Y10T428/2902
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
184 words
A sealed joint, comprising: a first member; a second member; one of said first and second members having a portion fitted into a recess provided in the other of said first and second members; one of said first and second members on said portion and the other of said first and second members in said groove constituting a seal for normally sealing with the respective said other of said first and second members in said groove and said one of said first and second members on said portion for preventing infiltration of rain and washing water from one side of said sealed joint to an opposite side of said sealed joint; a layer of water-swelling material, which swells upon absorption of water to enhance sealing, being provided between said first and said second members at least partly within said groove, this layer being present in a sufficient quantity to re-establish a seal between said first and second members should said seal for normally sealing fail and leak water so that such water contacts said layer of water-swelling material and causes said layer to swell.
Claim 2
Dependent Claim
184 words
A sealed joint, comprising: a first member; a second member; one of said first and second members having a portion fitted into a recess provided in the other of said first and second members; one of said first and second members on said portion and the other of said first and second members in said groove constituting a seal for normally sealing with the respective said other of said first and second members in said groove and said one of said first and second members on said portion for preventing infiltration of rain and washing water from one side of said sealed joint to an opposite side of said sealed joint; a layer of water-swelling material, which swells upon absorption of water to enhance sealing, being provided between said first and said second members at least partly within said groove, this layer being present in a sufficient quantity to re-establish a seal between said first and second members should said seal for normally sealing fail and leak water so that such water contacts said layer of water-swelling material and causes said layer to swell.
Claim 3
Dependent Claim
27 words
A sealed joint as claimed in claim 1, wherein the water-swelling material is made of a mixture of a water-absorbing polymer and a rubber or synthetic resin.
Claim 4
Dependent Claim
28 words
A sealed joint as claimed in claim 2, wherein the water-absorbing polymer is any one of the carboxymethyl cellulose, starch-polyacrylonitrile hydrolyzate, starch-polyacrylate, polyacrylonitrile hydrolyzate, and sodium polyacrylate hydrolyzate.
Claim 5
Dependent Claim
26 words
A sealed joint as claimed in claim 2, wherein the rubber is any one of natural rubber, ethylene-propylene rubber, chloroprene rubber, nitrile rubber, and styrene-butadiene rubber.
Claim 6
Dependent Claim
21 words
A sealed joint as claimed in claim 2, wherein the synthetic resin is any one of polypropylene, polyethylene, and polyvinyl chloride.
Claim 7
Dependent Claim
16 words
A sealed joint as claimed in claim 1, wherein the water-swelling material is a foamed material.
Claim 8
Dependent Claim
31 words
A sealed joint as claimed in claim 6, wherein the foamed material has such an expansion ratio that the density of the water-swelling material is 0.1 to 0.9 g/cm 3 .
Claim 9
Dependent Claim
18 words
The sealed joint of claim 1, wherein: one of said first and second members is made of rubber.
Claim 10
Dependent Claim
21 words
The sealed joint of claim 8, wherein: the other of said first and second members is an automotive body sheet member.
Claim 11
Dependent Claim
14 words
The sealed joint of claim 9, wherein: said rubber member is an automotive weatherstrip.
Claim 12
Dependent Claim
35 words
The sealed joint of claim 1, wherein: one of said first and second members is a sheet of window glazing material and the other of said first and second members is a window framing member.
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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) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |