Patent US3693370A successfully refreshed from Google Patents.
US3693370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermodynamic cycles
Assignee: Statham Instruments Inc
•
Filing: 1970-09-25
•
Granted: 1972-09-26
•
Expires: 1990-09-25
Abstract
Abstract This invention relates to thermodynamic cycles operating between two levels of subatmospheric temperature, whereby power is generated and/or refrigeration obtained, in which a heat transfer liquid is employed having a relatively high vapor pressure at atmospheric temperature.
Inventors
- 👤 David T Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:57
CPC Classifications
F; F01; F01K; F01K27/00; F25; F25B; F25B25/00; F25B27/00; F25B2400/00; F25B2400/14; F25B2400/141
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
A refrigerant cycle operating between two levels of temperature, including an evaporation zone exposed to the temperature to be controlled by the cycle, a condensation zone operating at a lower temperature than the evaporation zone, a vapor conduit connecting the evaporation zone with the condensation zone, a liquid collecting zone connected to said condensation zone, a liquid conduit connecting said liquid collecting zone with said evaporation zone and a pump in said conduit, a motor in said vapor conduit, a fan positioned adjacent to said evaporation zone, a fan motor connected to said fan, a vapor conduit connecting said first mentioned vapor conduit to said last-named motor, an exhaust vapor connection connected to said last-named motor and said condensation zone.
Claim 2
Dependent Claim
120 words
A refrigerant cycle operating between two levels of temperature, including an evaporation zone exposed to the temperature to be controlled by the cycle, a condensation zone operating at a lower temperature than the evaporation zone, a vapor conduit connecting the evaporation zone with the condensation zone, a liquid collecting zone connected to said condensation zone, a liquid conduit connecting said liquid collecting zone with said evaporation zone and a pump in said conduit, a motor in said vapor conduit, a fan positioned adjacent to said evaporation zone, a fan motor connected to said fan, a vapor conduit connecting said first mentioned vapor conduit to said last-named motor, an exhaust vapor connection connected to said last-named motor and said condensation zone.
Claim 3
Dependent Claim
43 words
In the cycle of claim 1, said evaporization zone comprising a coil connected to said pump and to said first mentioned vapor conduit, an insulated enclosure for said coil, said fan mounted for circulation of air over said coil and in said enclosure.
Claim 4
Dependent Claim
65 words
In the cycle of claim 2, a thermostatic element mounted in said enclosure responsive to the temperature in Said enclosure, a variable orifice mounted in said first mentioned vapor line between said condenser and said first mentioned motor, an operative connection between said thermostatic element and said variable orifice to vary the opening of the orifice responsive to the variation in temperature in said enclosure.
References Cited (Backward Citations)
US1101000A
Cited
US1217165A
Cited
US1887580A
Cited
US2009372A
Cited
US2175267A
Cited
US2576663A
Cited
US3196631A
Cited
US3234738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |