Patent US3149540A successfully refreshed from Google Patents.
US3149540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feeding devices for rock drills
Assignee: Atlas Copco AB
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Filing: 1961-06-26
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Granted: 1964-09-22
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 Lindgren Carl Olov
- 👤 Zettergren Birger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:21
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
IN A ROCK DRILL FEEDING DEVICE FOR ADVANCING AND RETRACTING A ROCK DRILL ALONG A SUPPORT THEREFOR, THE COMBINATION WHICH COMPRISES AN ELONGATED HOLLOW SHELL FORMING SAID SUPPORT, MEANS FORMING GUIDEWAYS ON SAID SHELL AND LONGITUDINALLY THEREOF, MEANS FOR CARRYING SAID ROCK DRILL ON SAID GUIDEWAYS FOR LONGITUDINALLY SLIDING MOVEMENT WITH RESPECT TO SAID SUPPORT, A CARRIAGE IN SAID HOLLOW SHELL, MEANS FOR SLIDABLY SUPPORTING SAID CARRIAGE IN SAID HOLLOW SHELL FOR LONGITUDINAL SLIDING MOVEMENT THEREIN IN BOTH ADVANCING AND RETRACTING DIRECTIONS, A PAIR OF ROTATING SPROCKETS LONGITUDINALLY SPACED APART ON SAID CARRIAGE, A FLEXIBLE ELONGATED CHAIN OVERLYING BOTH SAID SPROCKETS AND PORTIONS OF SAID CARRIAGE THEREBETWEEN AND IN POSITIVE ENGAGEMENT WITH SAID SPROCKETS FOR POSITIVE MOVEMENT OF SAID SPROCKETS ALONG SAID CHAIN, MEANS FOR AFFIXING OPPOSITE ENDS OF SAID CHAIN TO SAID HOLLOW SHELL, MEANS FOR CONNECTING SAID ROCK DRILL WITH SAID CHAIN AT A POINT THEREON SPACED SUBSTANTIALLY FROM BOTH ENDS THEREOF,
Claim 2
Dependent Claim
154 words
IN A ROCK DRILL FEEDING DEVICE FOR ADVANCING AND RETRACTING A ROCK DRILL ALONG A SUPPORT THEREFOR, THE COMBINATION WHICH COMPRISES AN ELONGATED HOLLOW SHELL FORMING SAID SUPPORT, MEANS FORMING GUIDEWAYS ON SAID SHELL AND LONGITUDINALLY THEREOF, MEANS FOR CARRYING SAID ROCK DRILL ON SAID GUIDEWAYS FOR LONGITUDINALLY SLIDING MOVEMENT WITH RESPECT TO SAID SUPPORT, A CARRIAGE IN SAID HOLLOW SHELL, MEANS FOR SLIDABLY SUPPORTING SAID CARRIAGE IN SAID HOLLOW SHELL FOR LONGITUDINAL SLIDING MOVEMENT THEREIN IN BOTH ADVANCING AND RETRACTING DIRECTIONS, A PAIR OF ROTATING SPROCKETS LONGITUDINALLY SPACED APART ON SAID CARRIAGE, A FLEXIBLE ELONGATED CHAIN OVERLYING BOTH SAID SPROCKETS AND PORTIONS OF SAID CARRIAGE THEREBETWEEN AND IN POSITIVE ENGAGEMENT WITH SAID SPROCKETS FOR POSITIVE MOVEMENT OF SAID SPROCKETS ALONG SAID CHAIN, MEANS FOR AFFIXING OPPOSITE ENDS OF SAID CHAIN TO SAID HOLLOW SHELL, MEANS FOR CONNECTING SAID ROCK DRILL WITH SAID CHAIN AT A POINT THEREON SPACED SUBSTANTIALLY FROM BOTH ENDS THEREOF,
References Cited (Backward Citations)
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US2840347A
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US2787250A
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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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |