Patent US4187440A successfully refreshed from Google Patents.
US4187440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic engine
Assignee: Individual
•
Filing: 1978-06-08
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Granted: 1980-02-05
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Expires: 1998-06-08
Abstract
Abstract Intermediate ram operated electromagnetically connects at least two cylinders to operate them reciprocally and drive a vehicle or the like.
Inventors
- 👤 Jamie F. Ulmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:54
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/12; H02K33/14; H02K7/00; H02K7/06; H02K7/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A reciprocating device comprising, in cooperative association, at least one pair of pistons and connecting rods mounted in respective associated cylinder chambers, a piston and cylinder chamber located intermediate said pair of pistons and associated chambers, the intermediate chamber being connected in fluid communication with said pair of chambers, an electrical coil located at each end of the intermediate chamber, means for alternately applying an electrical potential to the coils of the intermediate chamber, the alternate application of the electrical potential to the coils being effective to move the intermediate piston back and forth in the intermediate chamber, and thereby effect translation of the pair of pistons in their respective chambers.
Claim 2
Dependent Claim
111 words
A reciprocating device comprising, in cooperative association, at least one pair of pistons and connecting rods mounted in respective associated cylinder chambers, a piston and cylinder chamber located intermediate said pair of pistons and associated chambers, the intermediate chamber being connected in fluid communication with said pair of chambers, an electrical coil located at each end of the intermediate chamber, means for alternately applying an electrical potential to the coils of the intermediate chamber, the alternate application of the electrical potential to the coils being effective to move the intermediate piston back and forth in the intermediate chamber, and thereby effect translation of the pair of pistons in their respective chambers.
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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |