Internal heat motor
Abstract
Abstract A TERMAL UNIT CHARACTERIZED BY PISTON DISPOSED IN A CHAMBER IN A HOUSING WHICH CONTAINS A TEMPERATURE SENSITIVE EXPANSIVE MATERIAL WHICH EXPANDS AT A PRESCRIBED TEMPERATURE TO CAUSE MOVEMENT OF THE PISTON IN THE HOUSING. TO PREVENT LOSS OF THE THERMAL MATERIAL FROM THE HOUSING, A SEAL RING HAVING A FRUSTO-CONICAL OUTER SURFACE IS DISPOSED IN A PORTION OF THE HOUSING HAVING A COMPLEMENTARY FRUSTO-CONICAL SURFACE SO THAT PRESSURES DEVELOPED BY THE EXPANDING MATERIAL CAUSES THE SEAL RING TO WEDGE INTO A TIGHTER SEALING ENGAGEMENT WITH A POTION OF THE PISTON. THE SEALING ARRRANGEMENT IS PARTICULARLY ADAPTED FOR USE IN A TERMAL MOTOR WHICH INCLUDES A HEATING COIL HAVING TERMINALS FOR RECEIVING AN ELECTRICAL CURRENT FROM A SOURCE OUTSIDE OF THE UNIT TO CAUSE MOVEMENT OF THE PISTON IN RESPONSE TO AN APPLICATION OF ANF ELECTRIC CURRENT.
Inventors
- 👤 Donald F Janous
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |