Internal-combustion engines – Rotary
Reexamination Certificate
2008-03-11
2008-03-11
Cronin, Stephen K. (Department: 3747)
Internal-combustion engines
Rotary
C123S0650VD
Reexamination Certificate
active
11486460
ABSTRACT:
This invention relates to novel reciprocating shuttle inlet valves, effective with every type of two-cycle engine, from small high-speed single cylinder model engines, to large low-speed multiple cylinder engines, employing spark or compression ignition. Also permitting the elimination of out-of-phase piston arrangements to control scavenging and supercharging of opposed-piston engines. The reciprocating shuttle inlet valve (32) and its operating mechanism (34) is constructed as a single and simple uncomplicated member, in combination with the lost-motion abutments, (46) and (48), formed in a piston skirt, obviating the need for any complex mechanisms or auxiliary drives, unaffected by heat, friction, wear or inertial forces. The reciprocating shuttle inlet valve retains the simplicity and advantages of two-cycle engines, while permitting an increase in volumetric efficiency and performance, thereby increasing the range of usefulness of two-cycle engines into many areas that are now dominated by the four-cycle engine.
REFERENCES:
patent: 2018848 (1935-10-01), Gruebler
patent: 2814282 (1957-11-01), Gross
patent: 5261359 (1993-11-01), Hull
patent: 5769040 (1998-06-01), Christner et al.
Ali Hyder
Cronin Stephen K.
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