Patent US3282356A successfully refreshed from Google Patents.
US3282356A
Expired / Lapsed
US
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Drilling device
Assignee: Ingersoll Rand Co
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Filing: 1963-12-02
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Granted: 1966-11-01
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Expires: 1983-12-02
Abstract
No abstract record available.
Inventors
- 👤 Loree A D Paulson
- 👤 John W Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:32
CPC Classifications
E; E21; E21B; E21B7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE COMBINATION WITH AN ELEVATOR SHAFT HAVING LONGITUDINAL GUIDE MEANS POSITIONED INTERIORLY OF SAID SHAFT AND OPPOSING EACH OTHER COMPRISING (A) A SUPPORT WITHIN SAID SHAFT DISPLACED LONGITUDINALLY FORM THE BOTTOM OF SAID SHAFT, (B) A ROCK DRILLING DEVICE OF THE ROTARY PERCUSSIVE TYPE SUSPENDED FORM SAID SUPPORT TO BE LOWERED TO AND RETRACTED FROM THE BOTTOM OF SAID SHAFT, AND (C) A CENTRALIZER SLIDABLY MOUNTED ON SAID GUIDE HAVING A CENTRAL PORTION TO RECEIVE AND MAINTAIN SAID ROCK DRILLING DEVICER IN A CENTRAL POSITION RELATIVE TO SAID ELEVATOR SHAFT.
Claim 2
Dependent Claim
90 words
THE COMBINATION WITH AN ELEVATOR SHAFT HAVING LONGITUDINAL GUIDE MEANS POSITIONED INTERIORLY OF SAID SHAFT AND OPPOSING EACH OTHER COMPRISING (A) A SUPPORT WITHIN SAID SHAFT DISPLACED LONGITUDINALLY FORM THE BOTTOM OF SAID SHAFT, (B) A ROCK DRILLING DEVICE OF THE ROTARY PERCUSSIVE TYPE SUSPENDED FORM SAID SUPPORT TO BE LOWERED TO AND RETRACTED FROM THE BOTTOM OF SAID SHAFT, AND (C) A CENTRALIZER SLIDABLY MOUNTED ON SAID GUIDE HAVING A CENTRAL PORTION TO RECEIVE AND MAINTAIN SAID ROCK DRILLING DEVICER IN A CENTRAL POSITION RELATIVE TO SAID ELEVATOR SHAFT.
References Cited (Backward Citations)
US2105091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |