Patent US3872839A successfully refreshed from Google Patents.
US3872839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary piston engine
Assignee: Individual
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Filing: 1974-03-28
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Granted: 1975-03-25
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Expires: 1994-03-28
Abstract
Abstract A rotary piston engine incorporating a regenerator and valve system for heating input air at constant volume after compression to increase engine efficiency. A catalyst may be added to the regenerator and supplementary air may be injected into the system to reduce the emission of pollutants.
Inventors
- 👤 Charles R Russell
- 👤 Ii James R Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:00
CPC Classifications
F; F02; F02B; F02B53/00; F02B53/02; F02G; F02G1/00; F02G1/02; F02B1/00; F02B1/02; F02B1/04; F02B2053/005; F02G2258/00; F02G2258/10; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S60/00; Y10S60/901
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
In a rotary piston internal combustion engine having a rotor moving in an epitrochoidal housing to define compression and combustion chambers the improvement comprising: a. a regenerator, b. conduit means for directing combustion gases from said combustion chamber to said regenerator, c. conduit means for directing compressed air from said compression chamber at substantially constant volume through said regenerator and thence to said combustion chamber, and d. valve means for controlling the flow of combustion gas and compressed air through said regenerator.
Claim 2
Dependent Claim
82 words
In a rotary piston internal combustion engine having a rotor moving in an epitrochoidal housing to define compression and combustion chambers the improvement comprising: a. a regenerator, b. conduit means for directing combustion gases from said combustion chamber to said regenerator, c. conduit means for directing compressed air from said compression chamber at substantially constant volume through said regenerator and thence to said combustion chamber, and d. valve means for controlling the flow of combustion gas and compressed air through said regenerator.
Claim 3
Dependent Claim
14 words
The engine of claim 1 wherein the faces of said rotor are completely convex.
Claim 4
Dependent Claim
12 words
The engine of claim 1 wherein said regenerator is a heat exchanger.
Claim 5
Dependent Claim
19 words
The engine of claim 1 comprising in addition means for injecting air into the combustion gases entering said regenerator.
Claim 6
Dependent Claim
22 words
The engine of claim 1 comprising in addition a catalyst disposed in said regenerator effective to promote complete oxidation of combustion products.
Claim 7
Dependent Claim
22 words
The engine of claim 4 comprising in addition a catalyst disposed in said regenerator effective to promote complete oxidation of combustion products.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |