US PATENT SUBCLASS 91 / 50
.~ Cyclically operable

Current as of: June, 1999
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91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

47  DF  CONSTANTLY APPLIED MOTIVE FLUID WITH CONTROLLED VENTING {4}
50.~ Cyclically operable

DEFINITION

Classification: 91/50

(under subclass 47) Apparatus in which the motor is of the cyclically operable type.

(1) Note. For the definition of a cyclically operable motor see subclass 218 of this class.