US3729939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for sealing water at coupling portion of tunnel tubes
Assignee: Individual
•
Filing: 1971-09-09
•
Granted: 1973-05-01
•
Expires: 1991-09-09
Abstract
Abstract A device for sealing water at the coupling portion of tunnel tubes which has first and second tunnel tubes disposed opposite at the respective end surfaces, an outside gasket fixed at the base end of the first tunnel tube and contacted at the end with the second tunnel tube, an inside strip gasket secured at both sides to the stepped recess formed along the inner peripheral ends of the first and second tunnel tubes, and a coupling tube secured to the stepped recess of the first tunnel tube for supporting the inner surface of the inside gasket.
Inventors
- 👤 S Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:58
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/16; E02D; E02D25/00; E02D29/00; E02D29/063; E02D29/073
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
200 words
A device for sealing water at the coupling portion of tunnel tubes comprising first and second tunnel tubes each having a stepped recess portion formed along the inner peripheral surface of the end thereof and disposed oppositely at the end thereof, an outside gasket contacting the outer peripheral end of said second tunnel tube at one end thereof and fixed to the end of the outer peripheral end of said first tunnel tube at a base end thereof, an inner coupling tube having the outer peripheral surface of smaller diameter arranged in face-to-face relation with the stepped recess portion of said second tunnel tube and fixed to the stepped recess portion of said first tunnel tube at one end thereof, an inside strip gasket having both side adaptor portions mounted to the stepped recess portions of said first and second tunnel tubes, respectively, intermediate strip portion, and thick buffer bearing portion, said buffer bearing portion being interposed between the stepped recess portion of said second tunnel tube and the outer peripheral surface of small diameter of said inner coupling tube, said intermediate strip portion being disposed outside of the outer peripheral surface of small diameter of said inner coupling tube.
Claim 2
Independent Claim
200 words
A device for sealing water at the coupling portion of tunnel tubes comprising first and second tunnel tubes each having a stepped recess portion formed along the inner peripheral surface of the end thereof and disposed oppositely at the end thereof, an outside gasket contacting the outer peripheral end of said second tunnel tube at one end thereof and fixed to the end of the outer peripheral end of said first tunnel tube at a base end thereof, an inner coupling tube having the outer peripheral surface of smaller diameter arranged in face-to-face relation with the stepped recess portion of said second tunnel tube and fixed to the stepped recess portion of said first tunnel tube at one end thereof, an inside strip gasket having both side adaptor portions mounted to the stepped recess portions of said first and second tunnel tubes, respectively, intermediate strip portion, and thick buffer bearing portion, said buffer bearing portion being interposed between the stepped recess portion of said second tunnel tube and the outer peripheral surface of small diameter of said inner coupling tube, said intermediate strip portion being disposed outside of the outer peripheral surface of small diameter of said inner coupling tube.
Claim 3
Dependent Claim
31 words
A device as set forth in claim 1, wherein said first and second tunnel tubes are constructed of concrete, and reinforcing metal plates are secured to the outer peripheral ends thereof.
Claim 4
Dependent Claim
77 words
A device as set forth in claim 1, further comprising a seat plate fixed onto the outer peripheral end of said first tunnel tube, strip bearing members fixed to both sides of said seat plate, flanges provided to both sides of the base ends of said outside gasket, a strip keep member contacting the surface of the flange disposed between said strip bearing members, and bolts for fixing said strip keep members to said strip bearing members.
Claim 5
Dependent Claim
65 words
A device as set forth in claim 1, wherein projections extending longitudinally with said gasket are formed on the surfaces of both side adaptor portions of said inside gasket, and both side adaptor portions of said inside gasket are secured to said first and second tunnel tubes, respectively, by strip plates having grooves engaged with said projections held in place by anchor bolts and nuts.
Claim 6
Dependent Claim
96 words
A device as set forth in claim 1, wherein said inner coupling tube is formed by a pattern and bearing frame of metal plate having a bearing portion disposed in parallel with the surface of said stepped recess portion and inside the stepped recess portion of said second tunnel tube and secured to the stepped recess portion of said first tunnel tube at the adaptor portion of large diameter located at one end thereof, with concrete provided over the inside of said pattern and bearing frame and the stepped recess portion of said first tunnel tube.
Claim 7
Dependent Claim
34 words
A device as set forth in claim 1, wherein readily slippery synthetic resin layer is provided on the inside surfaces of the intermediate strip portion and buffer bearing portion of said inside strip gasket.
Claim 8
Dependent Claim
172 words
A device as set forth in claim 1, further comprising a securing concrete portion arranged such as to provide a gap with said inner coupling tube and located at the stepped recess portion of said second tunnel tube, tubes buried in said inner coupling tube and securing concrete portion, respectively, cylinders made of resilient material such as rubber buried between said tube and said inner coupling tube, and end surface contacting with the securing concrete portion and formed in a circular truncated conical shape thickened toward said end thereof, with resilient members such as rubber disposed in said tube and a keep washer having a spherical recess portion and a bearing washer having a spherical projected portion adapted for said spherical recess portion, a connecting rod passing thrOugh said cylinders of resilient material, front wall of said tube, said resilient members, wherein said keep washer and said bearing washer are screwed with set nuts contacting said bearing washers at both ends thereof for connecting said inner coupling tube to said fixing concrete.
Claim 9
Dependent Claim
53 words
A device as set forth in claim 7, further comprising a protecting tube surrounding said cylinder of resilient material simultaneously having projections for preventing itself from being drawn outside and being of circular truncated conical shape engaged with the hole of the front wall of said tube at the end of small diameter.
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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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |