US PATENT SUBCLASS 267 / 128
.~.~.~ Rigid-material-spring impelled

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

113  DF  FLUID {5}
118  DF  .~ Expansible-contractible chamber device {5}
124  DF  .~.~ Piston {4}
128.~.~.~ Rigid-material-spring impelled

DEFINITION

Classification: 267/128

(under subclass 124) Spring device in which an impetus for movement of the piston is provided by a separate, solid, resilient member.