US PATENT SUBCLASS 267 / 64.17
.~.~.~.~ Self-pumping

Current as of: June, 1999
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267 /   HD   SPRING DEVICES

2  DF  VEHICLE {14}
64.11  DF  .~ Comprising compressible fluid {6}
64.15  DF  .~.~ With retarder {5}
64.16  DF  .~.~.~ Leveling device {3}
64.17.~.~.~.~ Self-pumping

DEFINITION

Classification: 267/64.17

Self-pumping:

(under subclass 64.16) A device wherein the means to maintain the spring's working range includes a mechanism to generate increased fluid pressure within the device, the mechanism operating in response to oscillation of the device.