US PATENT SUBCLASS 92 / 208
.~ Open-ended hollow skirt type (e.g., trunk type)

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

172  DF  PISTON {19}
208.~ Open-ended hollow skirt type (e.g., trunk type) {15}
209  DF  .~.~> Frusto conical skirt
210  DF  .~.~> With weight balancing means
211  DF  .~.~> Element of diverse material extending through skirt wall abuts circumferentially extending resilient ring
212  DF  .~.~> With nonmetallic portion
213  DF  .~.~> End face surface includes areas of diverse material
214  DF  .~.~> Spaced wall skirt
215  DF  .~.~> Separate resilient elements secures end face portion to skirt portion
216  DF  .~.~> Plural separable parts {3}
222  DF  .~.~> Specific or diverse material; or welded, brazed or soldered joint {4}
232  DF  .~.~> Spaced skirt parts jointed by resilient arcuate web
233  DF  .~.~> Oval-shaped skirt portion
234  DF  .~.~> Skirt includes slit {1}
237  DF  .~.~> Circumferentially spaced portions at free end of skirt
238  DF  .~.~> Connecting rod pin supporting boss laterally spaced from skirt portion
239  DF  .~.~> With rib or strut means on piston part

DEFINITION

Classification: 92/208

(under subclass 172) Apparatus in which the peripheral portion of the piston includes a hollow tubular skirt-like member secured to and extending in a direction opposite from

the end face portion, said skirt-like member being open at one end thereof and being closed at the opposite end by said end face portion.