US PATENT SUBCLASS 92 / 224
.~.~.~ End face and skirt periphery of diverse material

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}
222  DF  .~.~ Specific or diverse material; or welded, brazed or soldered joint {4}
224.~.~.~ End face and skirt periphery of diverse material

DEFINITION

Classification: 92/224

(under subclass 222) Apparatus in which the end face portion of the piston is formed of material which is different from the material forming a major portion of the outer peripheral portion of the skirt-like member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

213, for an open ended skirt-type piston in which the end face surface has portions thereof formed of different kinds of material.

223, for an open ended skirt-type piston in which the end face or skirt is provided with a surface coating which constitutes a material for such portion different from the material forming the other portion.