US PATENT SUBCLASS 91 / 347
.~.~.~ Coil spring moves laterally relative to coil axis

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

218  DF  CYCLICALLY OPERABLE {34}
344  DF  .~ Biasing means moves distributor after predetermined travel (i.e., snap action) {2}
346  DF  .~.~ Spring biased {1}
347.~.~.~ Coil spring moves laterally relative to coil axis

DEFINITION

Classification: 91/347

(under subclass 346) Apparatus in which the spring comprises a helical element form of plural spaced coils which are biased parallel to the coil axis, and at least one complete coil of the helix is moved laterally relative to said axis during each cycle.