US PATENT SUBCLASS 335 / 29
.~.~.~.~.~ Fluid-controlled

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
6  DF  .~ Automatic circuit-interrupting devices (e.g., circuit-protective devices) {12}
21  DF  .~.~ With latch or trip means {6}
26  DF  .~.~.~ Reclosing or resetting {2}
28  DF  .~.~.~.~ Automatic combined with timing or delay means {4}
29.~.~.~.~.~ Fluid-controlled

DEFINITION

Classification: 335/29

(under subclass 28) Subject matter wherein the significant timing or delay means is fluid controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

61, for electromagnetically operated switches in general with pneumatic delay means.

62, for electromagnetically operated switches in general with hydraulic delay means.

240, for electromagnet with an armature movement control by the dashpot.

SEE OR SEARCH CLASS 188, Brakes,

266+, for a fluid-resistance brake or shock absorber of general utility.

200, Electricity: Circuit Makers and Breakers,

34, for nonmagnetically actuated switches with dashpot retarding means and subclasses 81+ for fluid pressure actuated switches.

361, Electricity: Electrical Systems and Devices,

116, for systems utilizing pneumatically operated breakers.