US3847124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Individual
•
Filing: 1973-03-30
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Granted: 1974-11-12
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Expires: 1993-03-30
Abstract
Abstract An internal combustion engine including a pair of compound cylinder assemblies in each of which two pistons operate. Each piston includes a head and an enlarged section. Each cylinder assembly includes a central tube in which heads of the pistons operate and outer sections of increased diameter which serve as compressor sections and in which enlarged sections of the pistons operate. Air is compressed in one compressor section of each assembly and a charge is compressed in the other compressor section of each assembly. The compressed air clears products of combustion from the central tubes.
Inventors
- 👤 L Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:48
CPC Classifications
F; F02; F02B; F02B25/00; F02B25/02; F02B25/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
325 words
An internal combustion engine which comprises a pair of central tubes, a pair of pistons associated with each central tube, heads of the pistons operating in the central tubes, each of the pistons including an enlarged body portion, cylinders in which the enlarged body portions of the pistons operate, means for connecting the pistons in each central tube to move toward each other and away from each other in unison and for causing the pistons associated with one central tube to move toward each other as the pistons associated with the other central tube move away from each other, exhaust ports in the central tubes which are opened when the pistons associated therewith are in a partly retracted position, air-injection openings in the central tubes which are opened when the pistons associated therewith are in a further retracted position, and fuel-injection openings in the central tubes which are opened when the pistons associated therewith are in a still further retracted position, means for connecting the air-injection openings of each central tube with one of the cylinders associated with the other central tube, means for connecting the fuel-injection openings of each central tube with the other of the cylinders associated with the other of the central tubes, means for permitting air to enter the cylinders which are connected to the air injection openings but for preventing exit of the air therefrom, and means for permitting a fuel-air mixture to enter the cylinders which are connected to the fuel-injection openings and for preventing exit of the fuel-air mixture therefrom, whereby the air is compressed in the cylinders connected to the air-injection openings and is injected into the central tubes after the exhaust openings have been opened to clear the products of combustion from the central tubes, and the air-fuel mixture is compressed in the cylinders connected to the fuel injection openings and is injected into the central tubes after the products of combustion have been cleared therefrom.
Claim 2
Dependent Claim
325 words
An internal combustion engine which comprises a pair of central tubes, a pair of pistons associated with each central tube, heads of the pistons operating in the central tubes, each of the pistons including an enlarged body portion, cylinders in which the enlarged body portions of the pistons operate, means for connecting the pistons in each central tube to move toward each other and away from each other in unison and for causing the pistons associated with one central tube to move toward each other as the pistons associated with the other central tube move away from each other, exhaust ports in the central tubes which are opened when the pistons associated therewith are in a partly retracted position, air-injection openings in the central tubes which are opened when the pistons associated therewith are in a further retracted position, and fuel-injection openings in the central tubes which are opened when the pistons associated therewith are in a still further retracted position, means for connecting the air-injection openings of each central tube with one of the cylinders associated with the other central tube, means for connecting the fuel-injection openings of each central tube with the other of the cylinders associated with the other of the central tubes, means for permitting air to enter the cylinders which are connected to the air injection openings but for preventing exit of the air therefrom, and means for permitting a fuel-air mixture to enter the cylinders which are connected to the fuel-injection openings and for preventing exit of the fuel-air mixture therefrom, whereby the air is compressed in the cylinders connected to the air-injection openings and is injected into the central tubes after the exhaust openings have been opened to clear the products of combustion from the central tubes, and the air-fuel mixture is compressed in the cylinders connected to the fuel injection openings and is injected into the central tubes after the products of combustion have been cleared therefrom.
Claim 3
Dependent Claim
34 words
An internal combustion engine as in claim 1 wherein the head and the body portion of each piston is hollow and means is provided for projecting coolant into the hollow interiors of the pistons.
Claim 4
Dependent Claim
47 words
An internal combustion engine as in claim 1 wherein in each central tube, the exhaust opening is closed by one of the piston heads and the air-injection opening and the fuel-injection opening are covered by the other piston head when the pistons are in an advanced position.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |