US PATENT SUBCLASS 123 / 90.1
POPPET VALVE OPERATING MECHANISM

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

90.1POPPET VALVE OPERATING MECHANISM {19}
90.11  DF  .~> Electrical system
90.12  DF  .~> Hydraulic system {1}
90.14  DF  .~> Pneumatic system
90.15  DF  .~> With means for varying timing {2}
90.19  DF  .~> With temperature compensation
90.2  DF  .~> With compound movement of cam follower
90.21  DF  .~> Follower displaced axially of camshaft
90.22  DF  .~> Plural valve trains, single actuator {1}
90.24  DF  .~> Valve driven closed {2}
90.27  DF  .~> Overhead camshaft
90.28  DF  .~> With nonvalving movement (e.g., about valve stem) {2}
90.31  DF  .~> Camshaft drive means
90.32  DF  .~> With alternate interruption of drive train
90.33  DF  .~> Lubrication {5}
90.39  DF  .~> Rocker {5}
90.48  DF  .~> Tappet {4}
90.6  DF  .~> Cam
90.61  DF  .~> Rod {2}
90.65  DF  .~> Spring {2}

DEFINITION

Classification: 123/90.1

(under the class definition) Subject matter relating to mechanism intermediate the crank-shaft and the poppet-type intake or exhaust valve of an internal combustion engine for operating at least one such valve.

(1) Note. If the mechanism operates a reciprocating valve of a type other than a poppet valve, a body of art of such mechanism--as well as the valve that it operates--has evolved in subclass 188.

(2) Note. The majority of the valve operating devices of this subclass are disclosed in connection with four-stroke-cycle engines; however, the devices occurring herein are not dependent upon the mode of operation of the engine, and are ordinarily capable of operating a poppet-type valve of an engine functioning upon a cycle of some other number of strokes. Valve operating mechanism especially designed for use with an engine of a particular form or mode of operation will be found in the subclasses pertaining to that engine.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41, for valve operating mechanism rendering the engine reversible.

64, for valve operating mechanism peculiar to a six-cycle engine.

65+, for valve operating mechanism peculiar to a two-cycle engine. 152, for valve operating mechanism combined with sparker operating mechanism.

179+, (particularly subclass 182), for valve operating mechanism related to facilitating engine starting.

188, for valve operating mechanism peculiar to reciprocating valves not of the poppet-type; see (1) Note above.

311+, (particularly subclasses 79 through 89), for valve operating mechanism peculiar to a four-cycle engine.

319+, for valve operating mechanism peculiar to the regulation of engine speed.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation, appropriate subclasses for the actuation of valves of more general utility.