Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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F01L
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
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7/00
Rotary or oscillatory slide valve-gear or valve arrangements
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F01L7/02
with cylindrical, sleeve, or part-annularly shaped valves
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F01L7/026
with two or more rotary valves, their rotational axes being parallel, e.g. 4-stroke
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