US3256944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool
Assignee: FRIEDRICH DUSS Firma
•
Filing: 1963-09-30
•
Granted: 1966-06-21
•
Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 Holzapfel Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:08
CPC Classifications
B; B25; B25D; B25D16/00; B23; B23Q; B23Q11/00; B23Q11/0042; B25D17/00; B25D17/06; B25D2211/00; B25D2211/003; B25D2211/06; B25D2211/068; B25D2217/00; B25D2217/003; B25D2217/0053; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A MANUALLY GUIDED, ELECTRICALLY DRIVEN POWER DRILL FOR WORKING STONE, SAID POWER DRILL COMPRISING, IN COMBINATION: A ROTARY AXIALLY VIBRATABLE DRILLING TOOL, SAID TOOL BEING PROVIDED WITH INTERNAL CHANNEL MEANS; MEANS OPERATIVELY CONNECTED WITH SAID DRILL FOR AXIALLY VIBRATING THE SAME, SAID MEANS INCLUDING A DRIVING MOTOR; BLOWER MEANS ALSO DRIVEN BY SAID MOTOR AND FORMING A SINGLE STRUCTURAL ENTITY THEREWITH, SAID BLOWER MEANS HAVING A SUCTION INLET; AND CONDUIT MEANS PLACING SAID CHANNEL MEANS OF SAID TOOL IN COMMUNICATION WITH SAID SUCTION INLET OF SAID BLOWER MEANS.
Claim 2
Dependent Claim
88 words
A MANUALLY GUIDED, ELECTRICALLY DRIVEN POWER DRILL FOR WORKING STONE, SAID POWER DRILL COMPRISING, IN COMBINATION: A ROTARY AXIALLY VIBRATABLE DRILLING TOOL, SAID TOOL BEING PROVIDED WITH INTERNAL CHANNEL MEANS; MEANS OPERATIVELY CONNECTED WITH SAID DRILL FOR AXIALLY VIBRATING THE SAME, SAID MEANS INCLUDING A DRIVING MOTOR; BLOWER MEANS ALSO DRIVEN BY SAID MOTOR AND FORMING A SINGLE STRUCTURAL ENTITY THEREWITH, SAID BLOWER MEANS HAVING A SUCTION INLET; AND CONDUIT MEANS PLACING SAID CHANNEL MEANS OF SAID TOOL IN COMMUNICATION WITH SAID SUCTION INLET OF SAID BLOWER MEANS.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |