Patent US1380880A successfully refreshed from Google Patents.
Patent US3176547A successfully refreshed from Google Patents.
US3176547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed transmission for a portable drill
Assignee: Individual
•
Filing: 1961-02-13
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Granted: 1965-04-06
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Expires: 1981-02-13
Abstract
No abstract record available.
Inventors
- 👤 Walter H Schnacke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:29
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/02; B23Q5/04; B23Q5/12; B23Q5/14; B23B; B23B45/00; B23B45/008; Y; Y10; Y10T; Y10T408/00; Y10T408/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A PORTABLE, HAND-MANIPULABLE DRILL, A VARIABLE SPEED TRANSMISSION COMPRISING A HOUSING, A POWER SHAFT EXTENDING INTO SAID HOUSING, A DRIVEN SHAFT JOURNALED IN SAID HOUSING FOR SUPPLYING POWER TO A DRILL BIT, A COUNTERSHAFT IN SAID HOUSING, MEANS DRIVINGLY CONNECTING SAID COUNTERSHAFT TO SAID POWER SHAFT, A FIRST SET OF GEARS ON SAID COUNTERSHAFT, A SECOND SET OF GEARS ON SAID DRIVIN SHAFT, ONE OF SAID SETS OF GEARS BEING DISPLACEABLE MOUNTED ON ITS RESPECTIVE SHAFT AND MOVABLE THEREON AS A UNIT, A SHIFT MECHANISM ON SAID HOUSING OPERATIVELY CONNECTED TO SAID ONE SET OF GEARS FOR SHIFTING AND POSITIONING SAID ONE SET OF GEARS WITH RESPECT TO THE OTHER SET OF GEARS, SAID POWER SHAFT HAVING AN AXIAL EXTENSION CONNECTED TO SAID TRANSMISSION, AND A CLUTCH CONNECTING SAID POWER SHAFT TO SAID EXTENSION.
Claim 2
Dependent Claim
135 words
IN A PORTABLE, HAND-MANIPULABLE DRILL, A VARIABLE SPEED TRANSMISSION COMPRISING A HOUSING, A POWER SHAFT EXTENDING INTO SAID HOUSING, A DRIVEN SHAFT JOURNALED IN SAID HOUSING FOR SUPPLYING POWER TO A DRILL BIT, A COUNTERSHAFT IN SAID HOUSING, MEANS DRIVINGLY CONNECTING SAID COUNTERSHAFT TO SAID POWER SHAFT, A FIRST SET OF GEARS ON SAID COUNTERSHAFT, A SECOND SET OF GEARS ON SAID DRIVIN SHAFT, ONE OF SAID SETS OF GEARS BEING DISPLACEABLE MOUNTED ON ITS RESPECTIVE SHAFT AND MOVABLE THEREON AS A UNIT, A SHIFT MECHANISM ON SAID HOUSING OPERATIVELY CONNECTED TO SAID ONE SET OF GEARS FOR SHIFTING AND POSITIONING SAID ONE SET OF GEARS WITH RESPECT TO THE OTHER SET OF GEARS, SAID POWER SHAFT HAVING AN AXIAL EXTENSION CONNECTED TO SAID TRANSMISSION, AND A CLUTCH CONNECTING SAID POWER SHAFT TO SAID EXTENSION.
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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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |