US3295892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steerable tunnel-drilling machine
Assignee: JAMES S ROBBINS AND ASSOCIATES Inc
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Filing: 1964-03-30
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Granted: 1967-01-03
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Douglas F Winberg
- 👤 Galgoczy John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:55
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/1093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A TUNNEL-BORING MACHINE, A POWER-DRIVEN ROTARY CUTTING HEAD, A MAIN BODY HAVING SAID HEAD JOURNALMOUNTED THEREON, A TRUNK EXTENDING REARWARDLY FROM SAID BODY, A BOX PROXIDING A SLIDE-WAY FOR THE REAR END OF SAID TRUNK, ANCHOR MEANS MOVABLE INTO AND OUT OF GRIPPING ENGAGEMENT WITH THE WALL OF A TUNNEL BEING BORED, MEANS SUPPORTING SAID BOX FROM THE ANCHOR MEANS FOR ADJUSTMENT OF THE BOX BOTH VERTICALLY AND TRANSVERSELY RELATIVE TO THE ANCHOR MEANS, AND A TRAILING AFTERBODY HINGED TO THE REAR END OF THE TRUNK.
Claim 2
Dependent Claim
87 words
IN A TUNNEL-BORING MACHINE, A POWER-DRIVEN ROTARY CUTTING HEAD, A MAIN BODY HAVING SAID HEAD JOURNALMOUNTED THEREON, A TRUNK EXTENDING REARWARDLY FROM SAID BODY, A BOX PROXIDING A SLIDE-WAY FOR THE REAR END OF SAID TRUNK, ANCHOR MEANS MOVABLE INTO AND OUT OF GRIPPING ENGAGEMENT WITH THE WALL OF A TUNNEL BEING BORED, MEANS SUPPORTING SAID BOX FROM THE ANCHOR MEANS FOR ADJUSTMENT OF THE BOX BOTH VERTICALLY AND TRANSVERSELY RELATIVE TO THE ANCHOR MEANS, AND A TRAILING AFTERBODY HINGED TO THE REAR END OF THE TRUNK.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |