US3729927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-cycle internal combustion engine
Assignee: Individual
•
Filing: 1972-01-03
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Granted: 1973-05-01
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Expires: 1992-01-03
Abstract
Abstract A piston driven compressionless engine having a combination intake and combustion manifold communicating with the upper end of the cylinder through a flap valve is filled with an explosive mixture from a carburetor by the upstroke of the piston in response to the opening of a suction valve opened by a crankshaft actuated cam with the previously burned gases being discharged from the cylinder during the piston upstroke by a crankshaft operated exhaust valve.
Inventors
- 👤 J Graves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
F; F02; F02G; F02G3/00; F02G3/02; F02B; F02B25/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2700/00; F02B2700/03; F02B2700/031
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
270 words
A two-cycle internal combustion engine, comprising: a crankcase having a top wall and having opposing end walls; a crankshaft including a crank arm journalled by said crankcase end wall; a cylinder mounted on said crankcase, said cylinder having an end wall opposite said crankcase, said cylinder end wall having a combustion inlet port and having a cylinder exhaust aperture; a piston reciprocable within said cylinder rod means connecting said piston with said crank arm; a combustion manifold overlying the combustion inlet port of said cylinder end wall and extending longitudinally coextensive with said cylinder the crankcase top wall having a cylinder suction port communicating with said combustion manifold and having a cylinder suction opening and a cylinder discharge opening communicating with the end of said cylinder opposite its end wall; an exhaust manifold overlying the cylinder end wall exhaust aperture, said exhaust manifold having an exhaust port; a coextensive lug formed on the depending surface of the crankcase top wall, said lug having a first chamber formed therein providing communication between the cylinder suction port and the cylinder suction opening, said lug having a second chamber providing communication between the cylinder discharge opening and the atmosphere, said combustion manifold having a fuel intake opening; a like plurality of flap vale means respectively opening and closing the fuel intake opening, the combustion inlet port and the cylinder discharge opening; a suction vale opening and closing the crankcase end wall cylinder suction port; an exhaust valve opening and closing the exhaust manifold exhaust port; and, cam means connected with said crankshaft and operatively connected with said suction valve and said exhaust valve.
Claim 2
Dependent Claim
270 words
A two-cycle internal combustion engine, comprising: a crankcase having a top wall and having opposing end walls; a crankshaft including a crank arm journalled by said crankcase end wall; a cylinder mounted on said crankcase, said cylinder having an end wall opposite said crankcase, said cylinder end wall having a combustion inlet port and having a cylinder exhaust aperture; a piston reciprocable within said cylinder rod means connecting said piston with said crank arm; a combustion manifold overlying the combustion inlet port of said cylinder end wall and extending longitudinally coextensive with said cylinder the crankcase top wall having a cylinder suction port communicating with said combustion manifold and having a cylinder suction opening and a cylinder discharge opening communicating with the end of said cylinder opposite its end wall; an exhaust manifold overlying the cylinder end wall exhaust aperture, said exhaust manifold having an exhaust port; a coextensive lug formed on the depending surface of the crankcase top wall, said lug having a first chamber formed therein providing communication between the cylinder suction port and the cylinder suction opening, said lug having a second chamber providing communication between the cylinder discharge opening and the atmosphere, said combustion manifold having a fuel intake opening; a like plurality of flap vale means respectively opening and closing the fuel intake opening, the combustion inlet port and the cylinder discharge opening; a suction vale opening and closing the crankcase end wall cylinder suction port; an exhaust valve opening and closing the exhaust manifold exhaust port; and, cam means connected with said crankshaft and operatively connected with said suction valve and said exhaust valve.
Claim 3
Dependent Claim
82 words
The engine according to claim 1 in which said rod means includes: a shaft portion coaxially connected at one end with said piston and projecting at its other end portion through said crankcase top wall; a sleeve bearing in said top wall longitudinally slidably supporting said shaft; a piston rod pivotally connected in longitudinal alignable relation at one end to the end of said shaft opposite said piston; and, a piston rod bearing secured to the other end of said piston rod.
Claim 4
Dependent Claim
102 words
The engine according to claim 2 in which said suction valve and said exhaust valve are each provided with a valve stem having a free end portion projecting toward said crankshaft and said cam means includes: a disk eccentrically surrounding an intermediate portion of said crankshaft on opposing sides of said crank arm; a push rod extending between each said disk and the free end of said valve stems, respectively; a roller journalled by the respective end portion of said push rods adjacent the respective said disk; and, spring means urging said suction valve and said exhaust valve toward a closed position.
References Cited (Backward Citations)
FR547771A
Cited
US2838034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |