US3297101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for boring a hole in rock
Assignee: Individual
•
Filing: 1964-10-16
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Granted: 1967-01-10
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Expires: 1984-10-16
Abstract
No abstract record available.
Inventors
- 👤 Wohlmeyer Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:30
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/106; E21B; E21B4/00; E21B4/16; E21D9/11; E21D9/112
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
APPARATUS FOR BORING HOLES IN ROCK COMPRISING: (A) A CARRIER; (B) MEANS FOR FEEDING SAID CARRIER IN A PREDETERMINED DIRECTION; (C) STRIKING TOOL MEANS CARRIED BY SAID CARRIER AND OPERABLE IN AN OPERATIVE POSITION OF THE APARATUS TO DELIVER SUCCESSIVE IMPACTS TO SUCCESSIVE INCREMENTAL ROCK SURFACE PORTIONS TO LOOSEN THE ROCK ADJACENT THERETO; AND (D) CUTTING TOOL MEANS CARRIED BY SAID CARRIER, SPACED FROM SAID STRIKING TOOL MEANS IN A DIRECTION OPPOSITE TO SAID PREDETERMINED DIRECTION, AND OPERABLE IN SAID OPERATIVE POSITION OF THE APPARATUS TO ACT ON EACH OF SAID SURFACE PORTIONS AFTER SUCH IMPACT HAS BEEN DELIVERED THERETO, SAID STRIKING TOOL MEANS INCLUDING (1) A ROTATABLE HAMMER SHAFT HAVING AN AXIS ARRANGED TO EXTEND SUBSTANTIALLY PARALLEL TO A ROCK SURFACE TO BE ACTED UPON (2) STRIKING WEIGHTS MOUNTED ON SAID SHAFT FOR RADIAL OUTWARD MOVEMENT UNDER THE ACTION OF CENTRIFUGAL FORCES WHEN SAID SHAFT ROTATES ABOUT SAID AXIS, (3) MOTOR MEANS FOR ROTATING SAID SHAFT ABOUT SAID AXIS, AND (4) STOP MEANS FOR LIMITING SAID OUTWARD MOVEMENT OF SAID WEIGHTS.
Claim 2
Dependent Claim
172 words
APPARATUS FOR BORING HOLES IN ROCK COMPRISING: (A) A CARRIER; (B) MEANS FOR FEEDING SAID CARRIER IN A PREDETERMINED DIRECTION; (C) STRIKING TOOL MEANS CARRIED BY SAID CARRIER AND OPERABLE IN AN OPERATIVE POSITION OF THE APARATUS TO DELIVER SUCCESSIVE IMPACTS TO SUCCESSIVE INCREMENTAL ROCK SURFACE PORTIONS TO LOOSEN THE ROCK ADJACENT THERETO; AND (D) CUTTING TOOL MEANS CARRIED BY SAID CARRIER, SPACED FROM SAID STRIKING TOOL MEANS IN A DIRECTION OPPOSITE TO SAID PREDETERMINED DIRECTION, AND OPERABLE IN SAID OPERATIVE POSITION OF THE APPARATUS TO ACT ON EACH OF SAID SURFACE PORTIONS AFTER SUCH IMPACT HAS BEEN DELIVERED THERETO, SAID STRIKING TOOL MEANS INCLUDING (1) A ROTATABLE HAMMER SHAFT HAVING AN AXIS ARRANGED TO EXTEND SUBSTANTIALLY PARALLEL TO A ROCK SURFACE TO BE ACTED UPON (2) STRIKING WEIGHTS MOUNTED ON SAID SHAFT FOR RADIAL OUTWARD MOVEMENT UNDER THE ACTION OF CENTRIFUGAL FORCES WHEN SAID SHAFT ROTATES ABOUT SAID AXIS, (3) MOTOR MEANS FOR ROTATING SAID SHAFT ABOUT SAID AXIS, AND (4) STOP MEANS FOR LIMITING SAID OUTWARD MOVEMENT OF SAID WEIGHTS.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |