Patent US3072203A successfully refreshed from Google Patents.
US3072203A
Expired / Lapsed
US
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Rotary earth boring drill
Assignee: Joy Manufacturing Co
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Filing: 1959-01-26
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Granted: 1963-01-08
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Alf H Bendixen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:51
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/084; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19079; Y10T74/19084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A DRILLING APPARATUS COMPRISING, AN ELONGATED ROTATABLE BODY HAVING A DRILL STEEL ROTATABLE THEREWITH AND RECTILINEARLY MOVABLE RELATIVE THERETO, A FIRST DIFFERENTIAL DRIVE MECHANISM HAVING CERTAIN PORTIONS THEREOF ROTATABLE WITH SAID BODY, ANOTHER PORTION OF SAID FIRST DIFFERENTIAL DRIVE BEING ROTATABLY CONNECTED TO SAID BODY AND COOPERABLE WITH SAID CERTAIN PORTIONS BUT BEING ROTATABLE INDEPENDENT OF THE ROTATION OF SAID BODY, A SECOND DIFFERENTIAL DRIVE MECHANISM HAVING THE OUTPUT THEREOF OPERATIVELY CONNECTED TO SAID ANOTHER PORTION OF SAID FIRST DIFFERENTIAL DRIVE, FIRST POWER MEANS FOR ROTATING SAID BODY AND SAID ANOTHER PORTION THROUGH SAID SECOND DIFFERENTIAL DRIVE MECHANISM RESPECTIVELY, SECOND POWER MEANS OPERABLE IN EITHER OF OPPOSITE DIRECTIONS AND HAVING THE OUTPUT THEREOF DRIVINGLY CONNECTED TO THE YOKE FRAME OF SAID SECOND DIFFERENTIAL DRIVE MECHANISM FOR VARYING THE SPEED AND DIRECTION OF ROTATION OF SUCH OUTPUT OF SAID SECOND DIFFERENTIAL DRIVE, AND MEANS CONNECTED TO SAID CERTAIN PORTIONS AND TO SAID DRILL STEEL FOR MOVING SAID DRILL STEEL RECTILINEARLY RELATIVE TO SAID BODY.
Claim 2
Dependent Claim
163 words
A DRILLING APPARATUS COMPRISING, AN ELONGATED ROTATABLE BODY HAVING A DRILL STEEL ROTATABLE THEREWITH AND RECTILINEARLY MOVABLE RELATIVE THERETO, A FIRST DIFFERENTIAL DRIVE MECHANISM HAVING CERTAIN PORTIONS THEREOF ROTATABLE WITH SAID BODY, ANOTHER PORTION OF SAID FIRST DIFFERENTIAL DRIVE BEING ROTATABLY CONNECTED TO SAID BODY AND COOPERABLE WITH SAID CERTAIN PORTIONS BUT BEING ROTATABLE INDEPENDENT OF THE ROTATION OF SAID BODY, A SECOND DIFFERENTIAL DRIVE MECHANISM HAVING THE OUTPUT THEREOF OPERATIVELY CONNECTED TO SAID ANOTHER PORTION OF SAID FIRST DIFFERENTIAL DRIVE, FIRST POWER MEANS FOR ROTATING SAID BODY AND SAID ANOTHER PORTION THROUGH SAID SECOND DIFFERENTIAL DRIVE MECHANISM RESPECTIVELY, SECOND POWER MEANS OPERABLE IN EITHER OF OPPOSITE DIRECTIONS AND HAVING THE OUTPUT THEREOF DRIVINGLY CONNECTED TO THE YOKE FRAME OF SAID SECOND DIFFERENTIAL DRIVE MECHANISM FOR VARYING THE SPEED AND DIRECTION OF ROTATION OF SUCH OUTPUT OF SAID SECOND DIFFERENTIAL DRIVE, AND MEANS CONNECTED TO SAID CERTAIN PORTIONS AND TO SAID DRILL STEEL FOR MOVING SAID DRILL STEEL RECTILINEARLY RELATIVE TO SAID BODY.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |