Patent US3302735A successfully refreshed from Google Patents.
US3302735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drilling apparatus
Assignee: Ingersoll Rand Co
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Filing: 1964-07-31
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Granted: 1967-02-07
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Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Carl T Klem
- 👤 Gyongyosi Laszlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:02
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN A ROCK DRILLING APPARATUS, THE COMBINATION OF (A) A DRILL TOWER SUPPORTED BY A BASE, (B) A MOUNTING SLIDABLY ATTACHED TO SAID TOWER FOR LONGITUDINAL MOVEMENT ALONG SAID TOWER SUBSTANTIALLY PARALLEL TO THE AXIS OF THE HOLE BEING DRILLED, (C) A RACK SUPPORTED BY SAID BASE ADAPTED TO STORE DRILL PIPES IN A POSITION PARALLEL TO THE AXIS OF THE HOLE BEING DRILLED AND IN A PLANE INTERSECTING THE AXIS OF THE HOLE BEING DRILLED, (D) A ROTARY HEAD SUPPORTED BY SAID MOUNTING FOR LONGITUDINAL MOVEMENT THEREWITH ALONG THE AXIS OF THE HOLE BEING DRILLED, (E) SAID MOUNTING INCLUDING MEANS TO PERMIT TRANSVERSE MOVEMENT OF SAID ROTARY HEAD RELATIVE TO THE AXIS OF THE HOLE BEING DRILLED, AND (F) MOTOR MEANS TO MOVE SAID ROTARY HEAD SELECTIVELY FROM A POSITION IN AXIAL ALIGNMENT WITH THE HOLE BEING DRILLED TO A POSITION IN AXIAL ALIGNMENT WITH EACH OF SAID DRILL PIPES IN SAID RACK.
Claim 2
Dependent Claim
154 words
IN A ROCK DRILLING APPARATUS, THE COMBINATION OF (A) A DRILL TOWER SUPPORTED BY A BASE, (B) A MOUNTING SLIDABLY ATTACHED TO SAID TOWER FOR LONGITUDINAL MOVEMENT ALONG SAID TOWER SUBSTANTIALLY PARALLEL TO THE AXIS OF THE HOLE BEING DRILLED, (C) A RACK SUPPORTED BY SAID BASE ADAPTED TO STORE DRILL PIPES IN A POSITION PARALLEL TO THE AXIS OF THE HOLE BEING DRILLED AND IN A PLANE INTERSECTING THE AXIS OF THE HOLE BEING DRILLED, (D) A ROTARY HEAD SUPPORTED BY SAID MOUNTING FOR LONGITUDINAL MOVEMENT THEREWITH ALONG THE AXIS OF THE HOLE BEING DRILLED, (E) SAID MOUNTING INCLUDING MEANS TO PERMIT TRANSVERSE MOVEMENT OF SAID ROTARY HEAD RELATIVE TO THE AXIS OF THE HOLE BEING DRILLED, AND (F) MOTOR MEANS TO MOVE SAID ROTARY HEAD SELECTIVELY FROM A POSITION IN AXIAL ALIGNMENT WITH THE HOLE BEING DRILLED TO A POSITION IN AXIAL ALIGNMENT WITH EACH OF SAID DRILL PIPES IN SAID RACK.
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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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |