US3178151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear displacement electromagnetic actuator
Assignee: Marquardt Corp
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Filing: 1963-01-23
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Granted: 1965-04-13
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Expires: 1983-01-23
Abstract
No abstract record available.
Inventors
- 👤 William I Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:08
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607; H01F7/1615; H01F7/121; H01F7/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A LINEAR DISPLACEMENT ELECTROMAGNETIC ACTUATOR COMPRISING: A CYLINDRICAL HOUSING MEMBER OF MAGNETIC MATERIAL HAVING AN ENCOMPASSING SIDEWALL, AN OPEN TOP AND AN OPEN BOTTOM; UPPER AND LOWER POLE PIECES MOUNTED IN SAID OPEN TOP AND SAID OPEN BOTTOM, RESPECTIVELY EACH POLE PIECE HAVING AN ANNULAR PORTION AND A CYLINDRICAL PORTION; A FLUX TRANSDUCER ENCOMPASSING EACH ANNULAR PORTION; AN ELECTRICAL COIL ENCOMPASSING EACH CYLINDRICAL PORTION; AN AMPLIFIER CONNECTED IN AN ELECTRICAL CIRCUIT WITH EACH COIL AND A RESPECTIVE FLUX TRANSDUCER; A RADIALLY-MAGNETIZED, RING-SHAPED MAGNET MOUNTED IN SAID HOUSING AND FORMING A CYLINDRICAL CHAMBER WITH SAID COILS AND THE ENDS OF SAID CYLINDRICAL PORTIONS OF SAID POLE PIECES; FLOW PASSAGES MOUNTED IN SAID POLE PIECES IN COMMUNICATION WITH SAID CHAMBER; A VALVE SEAT MOUNTED IN ONE OF SAID PASSAGES; AND A VALVE MEMBER SLIDABLY MOUNTED IN SAID CHAMBER FOR SEATING ON SAID SEAT WHEN A FIRST COIL IS ENERGIZED AND FOR UNSEATING WHEN A SECOND COIL IS ENERGIZED, SAID RING-SHAPED MAGNET MAINTAINING SAID VALVE MEMBER IN ITS THEN POSITION AFTER SAID COILS HAVE BEEN DEENERGIZED.
Claim 2
Dependent Claim
173 words
A LINEAR DISPLACEMENT ELECTROMAGNETIC ACTUATOR COMPRISING: A CYLINDRICAL HOUSING MEMBER OF MAGNETIC MATERIAL HAVING AN ENCOMPASSING SIDEWALL, AN OPEN TOP AND AN OPEN BOTTOM; UPPER AND LOWER POLE PIECES MOUNTED IN SAID OPEN TOP AND SAID OPEN BOTTOM, RESPECTIVELY EACH POLE PIECE HAVING AN ANNULAR PORTION AND A CYLINDRICAL PORTION; A FLUX TRANSDUCER ENCOMPASSING EACH ANNULAR PORTION; AN ELECTRICAL COIL ENCOMPASSING EACH CYLINDRICAL PORTION; AN AMPLIFIER CONNECTED IN AN ELECTRICAL CIRCUIT WITH EACH COIL AND A RESPECTIVE FLUX TRANSDUCER; A RADIALLY-MAGNETIZED, RING-SHAPED MAGNET MOUNTED IN SAID HOUSING AND FORMING A CYLINDRICAL CHAMBER WITH SAID COILS AND THE ENDS OF SAID CYLINDRICAL PORTIONS OF SAID POLE PIECES; FLOW PASSAGES MOUNTED IN SAID POLE PIECES IN COMMUNICATION WITH SAID CHAMBER; A VALVE SEAT MOUNTED IN ONE OF SAID PASSAGES; AND A VALVE MEMBER SLIDABLY MOUNTED IN SAID CHAMBER FOR SEATING ON SAID SEAT WHEN A FIRST COIL IS ENERGIZED AND FOR UNSEATING WHEN A SECOND COIL IS ENERGIZED, SAID RING-SHAPED MAGNET MAINTAINING SAID VALVE MEMBER IN ITS THEN POSITION AFTER SAID COILS HAVE BEEN DEENERGIZED.
References Cited (Backward Citations)
US2279243A
Cited
US3022450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |