US PATENT SUBCLASS 92 / 233
.~.~ Oval-shaped skirt portion

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

172  DF  PISTON {19}
208  DF  .~ Open-ended hollow skirt type (e.g., trunk type) {15}
233.~.~ Oval-shaped skirt portion

DEFINITION

Classification: 92/233

(under subclass 208) Apparatus in which the cross sectional shape of the skirt-like member for a major portion of its longitudinal dimension is elliptical.

SEE OR SEARCH THIS CLASS, SUBCLASS:

177, for a noncircular piston.