US3749066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Individual
•
Filing: 1971-02-22
•
Granted: 1973-07-31
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Expires: 1991-02-22
Abstract
Abstract A transfer postless two-stroke cycle internal combustion engine that has a stepped tube-like piston that cooperates with a cylinder head of related form to provide better scavenging and more horse power relative to present engines.
Inventors
- 👤 F Cseh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:02
CPC Classifications
F; F02; F02B; F02B25/00; F02B2700/00; F02B2700/03; F02B2700/031
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
181 words
A two-stroke cycle internal combustion engine comprising: a. at least one cylinder having an axially spaced exhaust port formed in the wall thereof; b. a cyclinder head having a bore therein; c. a deflector received in said bore and having an annular chamber formed therein which chamber is in communication with said cylinder; d. a stepped piston received within said cylinder having upper and lower portions, said upper portion dimensioned to fit into said annular chamber, said lower portion dimensioned to contact the wall of said cylinder; e. a transfer passage formed longitudinally through said stepped piston; f. and means mounting said stepped piston for reciprocal motion between a top dead center position in which said upper portion extends into said annular chamber and a bottom dead center position in which said upper portion is axially spaced from said deflector and its associated annular chamber forming a transfer gap, said means permitting inlet gases to pass through said transfer passage when said upper portion is axially spaced from said deflector to aid in expelling said exhaust gases through said exhaust port.
Claim 2
Dependent Claim
181 words
A two-stroke cycle internal combustion engine comprising: a. at least one cylinder having an axially spaced exhaust port formed in the wall thereof; b. a cyclinder head having a bore therein; c. a deflector received in said bore and having an annular chamber formed therein which chamber is in communication with said cylinder; d. a stepped piston received within said cylinder having upper and lower portions, said upper portion dimensioned to fit into said annular chamber, said lower portion dimensioned to contact the wall of said cylinder; e. a transfer passage formed longitudinally through said stepped piston; f. and means mounting said stepped piston for reciprocal motion between a top dead center position in which said upper portion extends into said annular chamber and a bottom dead center position in which said upper portion is axially spaced from said deflector and its associated annular chamber forming a transfer gap, said means permitting inlet gases to pass through said transfer passage when said upper portion is axially spaced from said deflector to aid in expelling said exhaust gases through said exhaust port.
Claim 3
Dependent Claim
132 words
In a two-stroke cycle internal combustion engine having at least one cylinder with an exhaust port formed in the wall thereof, a cylinder head, a deflector within said cylinder head and having an annular chamber therein in communication with said cylinder, a stepped piston within said cylinder having upper and lower portions, said upper portion dimensioned to fit into said annular chamber, said lower portion dimensioned to contact said wall and exhaust port, a transfer passage formed longitudinally through said stepped piston wherein the improvement comprises means mounting said stepped piston for reciprocal motion between a top dead center position in which said upper portion extends into said annular chamber and a bottom dead center position in which said upper portion is axially spaced from said deflector and its associated annular chamber.
Claim 4
Dependent Claim
132 words
In a two-stroke cycle internal combustion engine having at least one cylinder with an exhaust port formed in the wall thereof, a cylinder head, a deflector within said cylinder head and having an annular chamber therein in communication with said cylinder, a stepped piston within said cylinder having upper and lower portions, said upper portion dimensioned to fit into said annular chamber, said lower portion dimensioned to contact said wall and exhaust port, a transfer passage formed longitudinally through said stepped piston wherein the improvement comprises means mounting said stepped piston for reciprocal motion between a top dead center position in which said upper portion extends into said annular chamber and a bottom dead center position in which said upper portion is axially spaced from said deflector and its associated annular chamber.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |