US PATENT SUBCLASS 92 / 157
.~ Lubricant passage extends axially through articulated piston rod

Current as of: June, 1999
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92 /   HD   EXPANSIBLE CHAMBER DEVICES

153  DF  WITH LUBRICATING MEANS {5}
157.~ Lubricant passage extends axially through articulated piston rod

DEFINITION

Classification: 92/157

(under subclass 153) Apparatus in which a piston is provided with a connecting rod pivotally connected thereto, said rod having an axially extending passage means through which lubricant is conveyed between a lubricant source and a portion of the piston.