US PATENT SUBCLASS 267 / 127
.~.~.~.~ Trans-piston passage

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}
126  DF  .~.~.~ System {1}
127.~.~.~.~ Trans-piston passage

DEFINITION

Classification: 267/127

(under subclass 126) Spring device including means through the piston member for movement of liquid or gas to either side of said piston.

(1) Note. Mere clearance between the piston and the cylinder interior wall structure is not considered passage means for this subclass, even though particularly dimensioned for this purpose.