US PATENT SUBCLASS 137 / 636.4
.~.~ Reciprocation along and rotation about same axis

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

561 R  DF  SYSTEMS {32}
636  DF  .~ With selective motion for plural valve actuator {4}
636.4.~.~ Reciprocation along and rotation about same axis

DEFINITION

Classification: 137/636.4

(under subclass 636) Devices in which the movements are reciprocation of the actuator along, and rotation of it, about its axis.