Patent US3184710A successfully refreshed from Google Patents.
US3141171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric power tool
Assignee: Duo Fast Corp
•
Filing: 1961-12-22
•
Granted: 1964-07-21
•
Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Richard H Doyle
- 👤 Le Roy N Hermann
- 👤 Joseph S Naber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:11
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN AN ELECTRICALLY OPERATED TOOL FOR DRIVING FASTENERS, A HOUSING HAVING A GENERALLY INCLINED PORTION DEFINING A CHAMBER HAVING AN INCLINED WALL SURFACE, WINDING MEANS HAVING AN INNER WALL DEFINING AN AXIALLY EXTENDING OPENING AND AN OUTER WALL THAT IS AT LEAST PARTIALLY INCLINED INWARDLY TOWARD THE AXIS OF SAID OPENING, SAID WINDING BEING DISPOSED IN SAID CHAMBER WITH THE INCLINED WALL ON THE WINDING MEANS ADJACENT THE INCLINED WALL OF THE CHAMBER, AND ARMATURE MEANS MOVABLE IN SAID AXIALLY EXTENDING OPENING AND INCLUDING WORK ENGAGING MEANS EXTENDING OUT OF SAID HOUSING, SAID ARMATURE MEANS NORMALLY BEING DISPOSED WITH AN END PORTION WITHIN ONE END OF THE AXIAL OPENING AND BEING MOVABLE THROUGH THE AXIAL OPENING IN THE DIRECTION IN WHICH THE OUTER WALL OF THE WINDING MEANS INCLINES INWARDLY TOWARD THE AXIAL OPENING WHEN THE WINDING MEANS IS ENERGIZED.
Claim 2
Dependent Claim
140 words
IN AN ELECTRICALLY OPERATED TOOL FOR DRIVING FASTENERS, A HOUSING HAVING A GENERALLY INCLINED PORTION DEFINING A CHAMBER HAVING AN INCLINED WALL SURFACE, WINDING MEANS HAVING AN INNER WALL DEFINING AN AXIALLY EXTENDING OPENING AND AN OUTER WALL THAT IS AT LEAST PARTIALLY INCLINED INWARDLY TOWARD THE AXIS OF SAID OPENING, SAID WINDING BEING DISPOSED IN SAID CHAMBER WITH THE INCLINED WALL ON THE WINDING MEANS ADJACENT THE INCLINED WALL OF THE CHAMBER, AND ARMATURE MEANS MOVABLE IN SAID AXIALLY EXTENDING OPENING AND INCLUDING WORK ENGAGING MEANS EXTENDING OUT OF SAID HOUSING, SAID ARMATURE MEANS NORMALLY BEING DISPOSED WITH AN END PORTION WITHIN ONE END OF THE AXIAL OPENING AND BEING MOVABLE THROUGH THE AXIAL OPENING IN THE DIRECTION IN WHICH THE OUTER WALL OF THE WINDING MEANS INCLINES INWARDLY TOWARD THE AXIAL OPENING WHEN THE WINDING MEANS IS ENERGIZED.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |