Patent US3987632A successfully refreshed from Google Patents.
US3987632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid air engine
Assignee: Individual
•
Filing: 1971-07-30
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Granted: 1976-10-26
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Expires: 1991-07-30
Abstract
Abstract Liquid air injected into a chamber at a controlled rate undergoes a change in state to supply expanding gas to a turbine. The chamber is controllably heated to regulate conversion of the liquid air into gas and extraction of energy therefrom by the turbine isentropically.
Inventors
- 👤 Eugene F. Pereda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:26
CPC Classifications
F; F01; F01K; F01K25/00; F01K25/08; F01K25/10; F01K3/00; F01K3/18; F01K3/186
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
In a power plant having a turbine, insulated storage means containing a supply of liquid air, thermal controlling chamber means connected to the turbine for supply of expanding air in gaseous form to the turbine while the air is undergoing an isothermal change in state, means connected to the storage means for intermittently injecting the liquid air into the chamber means, and heating means in heat transfer relation to the chamber means for thermally regulating said isothermal change in state of the air between liquid and gaseous form without heating the air supplied to the turbine, said injecting means including pressure charging means connected to the storage means for receiving liquid air therefrom, a piston movably mounted in the pressure charging means for displacement of the liquid air therefrom, and one-way valve means connecting the pressure charging means to the chamber means.
Claim 2
Dependent Claim
142 words
In a power plant having a turbine, insulated storage means containing a supply of liquid air, thermal controlling chamber means connected to the turbine for supply of expanding air in gaseous form to the turbine while the air is undergoing an isothermal change in state, means connected to the storage means for intermittently injecting the liquid air into the chamber means, and heating means in heat transfer relation to the chamber means for thermally regulating said isothermal change in state of the air between liquid and gaseous form without heating the air supplied to the turbine, said injecting means including pressure charging means connected to the storage means for receiving liquid air therefrom, a piston movably mounted in the pressure charging means for displacement of the liquid air therefrom, and one-way valve means connecting the pressure charging means to the chamber means.
Claim 3
Dependent Claim
48 words
The combination of claim 1 including a source of electrical energy connected to the heating means, solenoid means connected to the piston for reciprocation thereof and pulsating means connecting the source to the solenoid means for operation of the injecting means simultaneously with energization of the heating means.
Claim 4
Dependent Claim
135 words
In a power plant having a turbine, insulated storage means containing a supply of liquid air, thermal controlling chamber means connected to the turbine for supply of expanding air in gaseous form to the turbine while the air is undergoing an isothermal change in state, means connected to the storage means for intermittently injecting the liquid air into the chamber means, heating means in heat transfer relation to the chamber means for thermally regulating said isothermal change in state of the air between liquid and gaseous form without heating the air supplied to the turbine, a source of electrical energy connected to the heating means, solenoid means connected to the injecting means and pulsating means connecting the source to the solenoid means for operation of the injecting means simultaneously with energization of the heating means.
Claim 5
Dependent Claim
135 words
In a power plant having a turbine, insulated storage means containing a supply of liquid air, thermal controlling chamber means connected to the turbine for supply of expanding air in gaseous form to the turbine while the air is undergoing an isothermal change in state, means connected to the storage means for intermittently injecting the liquid air into the chamber means, heating means in heat transfer relation to the chamber means for thermally regulating said isothermal change in state of the air between liquid and gaseous form without heating the air supplied to the turbine, a source of electrical energy connected to the heating means, solenoid means connected to the injecting means and pulsating means connecting the source to the solenoid means for operation of the injecting means simultaneously with energization of the heating means.
References Cited (Backward Citations)
US1310253A
Cited
GB189827153A
Cited
US671608A
Cited
US2327034A
Cited
US2289204A
Cited
US2567804A
Cited
US2683359A
Cited
US2793988A
Cited
US3028470A
Cited
US3209125A
Cited
US3398261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |