US PATENT SUBCLASS 122 / 495
CROWN SHEETS PROTECTING


Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

495CROWN SHEETS PROTECTING


DEFINITION

Classification: 122/495

(under the class definition) Subject matter relating to boilers having means to prevent the crown sheet over the firebox from being uncovered by water when the boiler is tilted from the normal horizontal position.

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490, for allied art.

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180, Motor Vehicles,

39, for devices to keep the boiler of a steam traction engine level when going up or down grade.

280, Land Vehicles, 7, for means for levelling a tank or boiler vehicle when on uneven ground.