Four-stroke internal combustion engine

Details Four-stroke internal combustion engine Four-stroke internal combustion engine

2000-11-27

2002-10-22

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Four-cycle

Crankcase compression of air or combustible mixture to be...

C123S0800BA

Reexamination Certificate

active

06467455

ABSTRACT:

BACKGROUND OF THE INVENTION
TECHNICAL FIELD
This invention relates to internal combustion engines, which are employed in model aviation airplanes or other applications that can utilize two-stroke or four-stroke internal combustion engines. The four-stroke internal combustion engines are more desirable for their quietness of operation and high torque ability at lower Revolutions Per Minute. The four-stroke internal combustion engines that are currently available are heavier than desired and require constant maintenance and adjustment of the gears, cams, valves, valve seats, push rods, rod bearings, springs, rocker arms, bolts, lock nuts and various other parts.
REFERENCE CITED
United States Patents
U.S. Pat. No. 968,200 August 1910 Scott . . . 123/73
U.S. Pat. No. 1,165,135 December 1915 Seitz . . . 123/78
U.S. Pat. No. 3,418,993 December 1968 Scheiterlein et al . . . 123/195
U.S. Pat. No. 4,907,544 March 1990 Burrahm . . . 123/26
BRIEF SUMMARY OF THE INVENTION
The present invention provides a four-stroke internal combustion engine with means for the injection of a fuel and air mixture into the combustion chamber of the engine using stationary port placement and synchronized port rotation using gears. An Important feature of the present invention is that it requires no cams, push rods, rocker arms, springs or valves.


REFERENCES:
patent: 3522797 (1970-08-01), Stinebaugh

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