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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F01B
MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
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11/00
Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
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F01B11/001
in which the movement in the two directions is obtained by one double acting piston motor
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