US PATENT SUBCLASS 91 / 254
.~.~.~.~ Biased cut off with adjustable trip

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

218  DF  CYCLICALLY OPERABLE {34}
247  DF  .~ Timing control by relative adjustment of plural movable fluid control elements {3}
252  DF  .~.~ Cut off adjustable relative to admission {4}
253  DF  .~.~.~ Inlet controlled by relatively cyclically moved elements {3}
254.~.~.~.~ Biased cut off with adjustable trip

DEFINITION

Classification: 91/254

(under subclass 253) Apparatus in which the means to adjust the control element for stopping fluid flow include means to move or hold said element from its fluid flow stopping position against a biasing force tending to move it to said fluid flow stopping position and adjustable means to release said moving or holding means to allow said biasing force to move said element to its fluid flow stopping position so as to vary the time of occurrence of the cut-off event.

SEE OR SEARCH THIS CLASS, SUBCLASS:

260+, for cyclically operable expansible chamber motors having adjustable trip means for a biased inlet valve means, other than the cut off element of a plural control element inlet valve, for varying the time of occurrence of the cut-off event.

331, for cyclically operable expansible chamber motors having independently operable means to adjust the connection between a working member and a distributing valve, other than those which adjust the timing of fluid control events as defined under subclass 247, in which the connection includes trip means.

344+, for cyclically operable expansible chamber motors in which a biased means moves a distributor after a predetermined travel, other than those which involve adjustable timing of fluid control events as defined under subclass 247.