US PATENT SUBCLASS 285 / 228
.~.~.~ Balanced

Current as of: June, 1999
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285 /   HD   PIPE JOINTS OR COUPLINGS

223  DF  FLEXIBLE JOINT, RIGID MEMBERS {6}
226  DF  .~ Bellows {2}
227  DF  .~.~ Multiple {1}
228.~.~.~ Balanced

DEFINITION

Classification: 285/228

(under subclass 227) Devices in which the fluid pressure in one bellows member tends to neutralize the movement of the other bellows member.