US3092190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large diameter earth drill
Assignee: Individual
•
Filing: 1960-04-04
•
Granted: 1963-06-04
•
Expires: 1980-04-04
Abstract
No abstract record available.
Inventors
- 👤 Gruere Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:13
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/002; E21B10/00; E21B10/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A ROTARY LARGE DIAMETER ROCK DRILL COMPRISING A ROTAY SHAFT OF UNIVERSALLY CONNECTED SECTIONS OF PREDETERMINED UNIT LENGTHS, A CENTRAL LEAD DRILL CARRIED BY THE FORWARD END OF SAID SHAFT, A TUBULAR OUTER SHAFT SUBSTANTIALLY CONCENTRIC OF SAID FIRST NAMED SHAFT AND OF RIGIDLY CONNECTED SECTIONS OF CORRESPONDING UNIT LENGTHS TO PROVIDE FOR INSERTION AND REMOVAL OF SHAFT SECTIONS AS NEEDED, BEARING SUPPORTS FOR SAID FIRST NAMED SHAFT SECTIONS WITHIN THE CORRESPONDING TUBULAR SHAFT SECTIONS, A DRILL CARRIED BY THE FORWARD END OF SAID TUBULAR SHAFT OF SUBSTANTIALLY GREATER DIAMETER THAN SAID LEAD DRILL AND TUBULAR SHAFT, A SPIRAL FLIGHT CARRIED ON THE OUTSIDE OF SAID TUBULAR SHAFT, AND MEANS TO ROTATE SAID SHAFTS SEPARATELY TO PROVIDE DIFFERENT SPEEDS OF ROTATION FOR SAID DRILLS.
Claim 2
Dependent Claim
124 words
A ROTARY LARGE DIAMETER ROCK DRILL COMPRISING A ROTAY SHAFT OF UNIVERSALLY CONNECTED SECTIONS OF PREDETERMINED UNIT LENGTHS, A CENTRAL LEAD DRILL CARRIED BY THE FORWARD END OF SAID SHAFT, A TUBULAR OUTER SHAFT SUBSTANTIALLY CONCENTRIC OF SAID FIRST NAMED SHAFT AND OF RIGIDLY CONNECTED SECTIONS OF CORRESPONDING UNIT LENGTHS TO PROVIDE FOR INSERTION AND REMOVAL OF SHAFT SECTIONS AS NEEDED, BEARING SUPPORTS FOR SAID FIRST NAMED SHAFT SECTIONS WITHIN THE CORRESPONDING TUBULAR SHAFT SECTIONS, A DRILL CARRIED BY THE FORWARD END OF SAID TUBULAR SHAFT OF SUBSTANTIALLY GREATER DIAMETER THAN SAID LEAD DRILL AND TUBULAR SHAFT, A SPIRAL FLIGHT CARRIED ON THE OUTSIDE OF SAID TUBULAR SHAFT, AND MEANS TO ROTATE SAID SHAFTS SEPARATELY TO PROVIDE DIFFERENT SPEEDS OF ROTATION FOR SAID DRILLS.
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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) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |