US3088531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill carrier
Assignee: Westinghouse Air Brake Co
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Filing: 1960-01-21
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Granted: 1963-05-07
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Expires: 1980-01-21
Abstract
No abstract record available.
Inventors
- 👤 Verne M Garrett
- 👤 Vernon G Sommers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:26
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A ROCK DRILL CRUISER COMPRISING, A PAIR OF LATERALLY SPACED ELONGATED FRAMES HAVING AN ENDLESS GROUND ENGAGING TRACK THEREON, A PLATFORM DISPOSED BETWEEN SAID FRAMES AND HAVING A ROCK DRILL ASSEMBLAGE MOUNTED THEREON AND TRANSPORTABLE BY SAID TRACKS, COAXIAL SHAFTS PIVOTALLY SUSPENDING SAID FRAMES FROM THE OPPOSITE SIDES OF SAID PLATFORM FOR INDEPENDENT SWINGING OF THE FRAMES RELATIVE TO THE PLATFORM ABOUT A COMMON AXIS, MEANS CARRIED BY SAID SHAFTS FOR DRIVING SAID TRACKS, A PIVOT PIN DISPOSED IN AXIAL ALIGNMENT WITH SAID SHAFTS AND BEING FIXEDLY SUSPENDED FROM A MEDICAL PORTION AND WITHIN THE MARGINAL CONFINES OF THE PLATFORM BETWEEN THE SHAFTS, RIGID BEAMS SWINGABLY CONNECTING SAID PIVOT PIN WITH SAID FRAMES REMOTE FROM SAID SHAFTS, A HYDRAULIC EQUALIZER UNIT CONNECTING SAID PLATFORM DIRECTLY WITH MEDIAL PORTIONS OF EACH OF SAID BEAMS, EACH OF SAID UNITS HAVING A PISTON RECIPROCABLE WITHIN A LIQUID FILLED CYLINDER AND COACTING WITH THE LIQUID TO PROVIDE A PISTON DISPLACEMENT CHAMBER, AND A PRESSURE EQUALIZING CONDUIT CONNECTING SAID DISPLACEMENT CHAMBER OF SAID UNITS.
Claim 2
Dependent Claim
169 words
A ROCK DRILL CRUISER COMPRISING, A PAIR OF LATERALLY SPACED ELONGATED FRAMES HAVING AN ENDLESS GROUND ENGAGING TRACK THEREON, A PLATFORM DISPOSED BETWEEN SAID FRAMES AND HAVING A ROCK DRILL ASSEMBLAGE MOUNTED THEREON AND TRANSPORTABLE BY SAID TRACKS, COAXIAL SHAFTS PIVOTALLY SUSPENDING SAID FRAMES FROM THE OPPOSITE SIDES OF SAID PLATFORM FOR INDEPENDENT SWINGING OF THE FRAMES RELATIVE TO THE PLATFORM ABOUT A COMMON AXIS, MEANS CARRIED BY SAID SHAFTS FOR DRIVING SAID TRACKS, A PIVOT PIN DISPOSED IN AXIAL ALIGNMENT WITH SAID SHAFTS AND BEING FIXEDLY SUSPENDED FROM A MEDICAL PORTION AND WITHIN THE MARGINAL CONFINES OF THE PLATFORM BETWEEN THE SHAFTS, RIGID BEAMS SWINGABLY CONNECTING SAID PIVOT PIN WITH SAID FRAMES REMOTE FROM SAID SHAFTS, A HYDRAULIC EQUALIZER UNIT CONNECTING SAID PLATFORM DIRECTLY WITH MEDIAL PORTIONS OF EACH OF SAID BEAMS, EACH OF SAID UNITS HAVING A PISTON RECIPROCABLE WITHIN A LIQUID FILLED CYLINDER AND COACTING WITH THE LIQUID TO PROVIDE A PISTON DISPLACEMENT CHAMBER, AND A PRESSURE EQUALIZING CONDUIT CONNECTING SAID DISPLACEMENT CHAMBER OF SAID UNITS.
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) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |