US PATENT SUBCLASS 92 / 231
.~.~.~ Welded, brazed or soldered (260)

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}
231.~.~.~ Welded, brazed or soldered (260)

DEFINITION

Classification: 92/231

(under subclass 222) Apparatus comprising a welded, brazed or soldered joint.

SEE OR SEARCH THIS CLASS, SUBCLASS:

223, for an open ended skirt-type piston having a surface portion thereof provided with a metal coating which is molecularly bonded to the metal of the piston surface.

260, for a piston formed of parts which are welded, brazed or soldered together.