US3094900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener driving apparatus
Assignee: Duo Fast Corp
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Filing: 1956-12-27
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Granted: 1963-06-25
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Expires: 1976-12-27
Abstract
No abstract record available.
Inventors
- 👤 Oscar A Wandel
- 👤 Richard H Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:01
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/04; B25C1/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A FASTENER DRIVING APPARATUS COMPRISING A HOUSING DEFINING A CHAMBER TO WHICH A MEDIUM UNDER PRESSURE IS CONTINUOUSLY SUPPLIED, A VALVE ELEMENT, A CYLINDER MOVABLY MOUNTED IN SAID CHAMBER AND ENGAGING SAID VALVE ELEMENT SO THAT THE INTERIOR OF SAID CYLINDER IS CLOSED OFF FROM COMMUNICATION WITH SAID CHAMBER, A PISTON SLIDABLY MOUNTED RELATIVE TO AND DISPOSED WITHIN SAID CYLINDER, AND MEANS FOR MOVING SAID CYLINDER RELATIVE TO SAID HOUSING AND AWAY FROM SAID VALVE ELEMENT TO PLACE THE INTERIOR OF SAID CYLINDER IN COMMUNICATION WITH SAID CHAMBER SO THAT THE PISTON IS ADVANCED BY THE MEDIUM UNDER PRESSURE.
Claim 2
Dependent Claim
99 words
A FASTENER DRIVING APPARATUS COMPRISING A HOUSING DEFINING A CHAMBER TO WHICH A MEDIUM UNDER PRESSURE IS CONTINUOUSLY SUPPLIED, A VALVE ELEMENT, A CYLINDER MOVABLY MOUNTED IN SAID CHAMBER AND ENGAGING SAID VALVE ELEMENT SO THAT THE INTERIOR OF SAID CYLINDER IS CLOSED OFF FROM COMMUNICATION WITH SAID CHAMBER, A PISTON SLIDABLY MOUNTED RELATIVE TO AND DISPOSED WITHIN SAID CYLINDER, AND MEANS FOR MOVING SAID CYLINDER RELATIVE TO SAID HOUSING AND AWAY FROM SAID VALVE ELEMENT TO PLACE THE INTERIOR OF SAID CYLINDER IN COMMUNICATION WITH SAID CHAMBER SO THAT THE PISTON IS ADVANCED BY THE MEDIUM UNDER PRESSURE.
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) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |