US PATENT SUBCLASS 60 / 371
.~.~ Having means to store and release energy usable to energize motor work output means

Current as of: June, 1999
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60 /   HD   POWER PLANTS

325  DF  PRESSURE FLUID SOURCE AND MOTOR {47}
369  DF  .~ Cyclically operable reciprocating or oscillating motor or output stroke device {11}
371.~.~ Having means to store and release energy usable to energize motor work output means {1}
372  DF  .~.~.~> Pneumatic counter-balance of gravity load on motor (e.g., deep well pump rod, etc.)

DEFINITION

Classification: 60/371

(under subclass 369) Apparatus comprising means to store some of the energy available to activate or output from the motor means during part of the time while the motor working member is in motion whereby said stored energy may be released to motivate the working member during another part of the time when it is in motion.