Patent US3555344A successfully refreshed from Google Patents.
Patent US3308415A successfully refreshed from Google Patents.
US3308415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-adjusting three-prong electric plug adaptable for either two or three prong electric sockets
Assignee: Individual
•
Filing: 1964-11-17
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Granted: 1967-03-07
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Expires: 1984-11-17
Abstract
No abstract record available.
Inventors
- 👤 Milton L Cramer
- 👤 Dov Z Glucksman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:22
CPC Classifications
H; H01; H01R; H01R27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
AN ELECTRICAL PLUG COMPRISING IN COMBINATION: (A) A PLUG BODY OF INSULATING MATERIAL DEFINING AN INTERNAL PASSAGEWAY; (B) A PAIR OF BLADE CONTACTS EXTENDING GENERALLY PARALLEL TO SAID PASSAGEWAY AND PROJECTING OUTWARDLY FROM A SURFACE OF SAID PLUG BODY; (C) A GROUND PIN NON-CIRCULAR IN CROSS-SECTION EXTENDING GENERALLY PARALLEL TO SAID PAIR OF BLADE CONTACTS AND PROJECTING OUTWARDLY FROM SAID SURFACE OF SAID PLUG BODY, SAID GROUND PIN HAVING AN AXIAL CYLINDRICAL EXTENSION INSERTED INTO SAID PASSAGEWAY OF SAID PLUG BODY; (D) SPRING MEANS INSIDE SAID PASSAGEWAY BIASING SAID AXIAL CYLINDRICAL EXTENSION AND SAID GROUND PIN IN A DIRECTION LONGITUDINALLY THEREOF; AND (E) COOPERATING GUIDE MEANS ON SAID PLUG BODY AND SAID AXIAL CYLINDRICAL EXTENSION FOR CAUSING A COMBINED ROTARY AND LINEAR MOTION OF SAID GROUND PIN INTO SAID PASSAGEWAY DEFINED BY SAID PLUG BODY IN RESPONSE TO AXIAL PRESSURE UPON SAID GROUND PIN OPPOSED TO THE BIAS OF SAID SPRING MEANS.
Claim 2
Dependent Claim
152 words
AN ELECTRICAL PLUG COMPRISING IN COMBINATION: (A) A PLUG BODY OF INSULATING MATERIAL DEFINING AN INTERNAL PASSAGEWAY; (B) A PAIR OF BLADE CONTACTS EXTENDING GENERALLY PARALLEL TO SAID PASSAGEWAY AND PROJECTING OUTWARDLY FROM A SURFACE OF SAID PLUG BODY; (C) A GROUND PIN NON-CIRCULAR IN CROSS-SECTION EXTENDING GENERALLY PARALLEL TO SAID PAIR OF BLADE CONTACTS AND PROJECTING OUTWARDLY FROM SAID SURFACE OF SAID PLUG BODY, SAID GROUND PIN HAVING AN AXIAL CYLINDRICAL EXTENSION INSERTED INTO SAID PASSAGEWAY OF SAID PLUG BODY; (D) SPRING MEANS INSIDE SAID PASSAGEWAY BIASING SAID AXIAL CYLINDRICAL EXTENSION AND SAID GROUND PIN IN A DIRECTION LONGITUDINALLY THEREOF; AND (E) COOPERATING GUIDE MEANS ON SAID PLUG BODY AND SAID AXIAL CYLINDRICAL EXTENSION FOR CAUSING A COMBINED ROTARY AND LINEAR MOTION OF SAID GROUND PIN INTO SAID PASSAGEWAY DEFINED BY SAID PLUG BODY IN RESPONSE TO AXIAL PRESSURE UPON SAID GROUND PIN OPPOSED TO THE BIAS OF SAID SPRING 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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |