US PATENT SUBCLASS 91 / 168
.~ Control of motive fluid for one working member in response to position of second


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

167 R  DF  EXTENSION OF UNIT HAVING SEPARATELY CONTROLLED WORKING CHAMBERS EQUALS SUM OF INDIVIDUAL CHAMBER EXTENSIONS {2}
168.~ Control of motive fluid for one working member in response to position of second


DEFINITION

Classification: 91/168

(under subclass 167) Apparatus in which the supply of motive fluid to one working chamber is controlled in response to the working member in another working chamber attaining a given position in its chamber.

(1) Note. The position at which control occurs may be immediately after one working member is slightly moved, i.e., where a valved passage through a working member in one working chamber is held open or closed in response to the proximity of the working member to its starting position but upon slight movement of the working member is either (1) opened to port working fluid to another working chamber or (2) closed to lock up working fluid in another working

chamber.