US3203737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock driling machine
Assignee: James S Robbins & Associates Inc
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Filing: 1963-03-18
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Granted: 1965-08-31
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Expires: 1983-03-18
Abstract
No abstract record available.
Inventors
- 👤 Richard J Robbins
- 👤 Douglas F Winberg
- 👤 Galgoczy John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:40
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/11; E21D9/112; E21D9/1093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A TUNNEL-BORG MACHINE, A POWER-DRIVEN ROTARY CUTTING HEAS, A SUPPORTINF MAIN FRAME HAVUNG SAID HEAD JOURNAL-MOUNTED UPON A FRONT PORTION THEREOF AND TO THE REAR OF SAID JOURNAL PROVIDING A RIGID TRUNK, THE TRUNK PRESENTING GUIDE FACES DISPOSED PARALLEL WITH THE ROTARY AXIS OF THE CUTTING HEAD, AN ANCHOR ASSEMBLY INCLUDING SHOES ARRANGED TO BE PRESSED OUTWARDLY INTO GRIPPING ENGAGEMENT WITH THE WALL OF THE TUNNEL, TRUNKPOSITIONING MEANS PROVIDING FOR EACH OF SAID GUIDE FACES A RESPECTIVE SURFACE DISPOSED LONGITUDINAL TO THE TUNNEL AND A OVER WHICH THE GUIDE FACE SLIDES, AND OPERATIVE INTERCONNECTION BETWEEN THE ANCHOR ASSEMBLY AND THE TRUNKPOSITIONING MEANS PERMITTING THE SLIDE SURFACES OF THE LATTER TO BE SET IN SELECTED ADJUSTED POSITIONS SHIFTED INWARDLY AND OUTWARDLY IN RELATION TO THE WALLS OF THE TUNNEL SO AS TO STEER THE HEAD BY CONSTRAINING THE HEAD TO TRAVEL A GUIDED PATH.
Claim 2
Dependent Claim
144 words
IN A TUNNEL-BORG MACHINE, A POWER-DRIVEN ROTARY CUTTING HEAS, A SUPPORTINF MAIN FRAME HAVUNG SAID HEAD JOURNAL-MOUNTED UPON A FRONT PORTION THEREOF AND TO THE REAR OF SAID JOURNAL PROVIDING A RIGID TRUNK, THE TRUNK PRESENTING GUIDE FACES DISPOSED PARALLEL WITH THE ROTARY AXIS OF THE CUTTING HEAD, AN ANCHOR ASSEMBLY INCLUDING SHOES ARRANGED TO BE PRESSED OUTWARDLY INTO GRIPPING ENGAGEMENT WITH THE WALL OF THE TUNNEL, TRUNKPOSITIONING MEANS PROVIDING FOR EACH OF SAID GUIDE FACES A RESPECTIVE SURFACE DISPOSED LONGITUDINAL TO THE TUNNEL AND A OVER WHICH THE GUIDE FACE SLIDES, AND OPERATIVE INTERCONNECTION BETWEEN THE ANCHOR ASSEMBLY AND THE TRUNKPOSITIONING MEANS PERMITTING THE SLIDE SURFACES OF THE LATTER TO BE SET IN SELECTED ADJUSTED POSITIONS SHIFTED INWARDLY AND OUTWARDLY IN RELATION TO THE WALLS OF THE TUNNEL SO AS TO STEER THE HEAD BY CONSTRAINING THE HEAD TO TRAVEL A GUIDED PATH.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |