US PATENT SUBCLASS 251 / 257
.~.~ Encased with seal

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

213  DF  MECHANICAL MOVEMENT ACTUATOR {10}
251  DF  .~ Cam {3}
257.~.~ Encased with seal {4}
258  DF  .~.~.~> Bi-directional
259  DF  .~.~.~> Cam is finger-like extension
260  DF  .~.~.~> Overhung crank type
261  DF  .~.~.~> Center crank type

DEFINITION

Classification: 251/257

(under subclass 251) Devices in which the cam elements are encased within the valve body structure with a seal or packing externally of the elements.

SEE OR SEARCH CLASS

277, Seal for a Joint or Juncture, for a generic sealing means or process,

628+, for a static contact seal for other than an internal combustion engine, or a pipe, conduit, or cable.