US PATENT SUBCLASS 185 / 28
.~ Operator's weight

Current as of: June, 1999
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185 /   HD   MOTORS: SPRING, WEIGHT, OR ANIMAL POWERED

27  DF  WEIGHT {4}
28.~ Operator's weight

DEFINITION

Classification: 185/28

(under subclass 27) Weight motors in which energy is derived from the weight of the operators without other application of energy by the operators.

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15.5, for motors in which energy is derived from work done by an operator on a lever system including a pivoted seat.

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74, Machine Element or Mechanism,

523+, for hand levers and treadles, per se.