US PATENT SUBCLASS 440 / 12.61
.~.~.~.~ Spur gearing

Current as of: June, 1999
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440 /   HD   MARINE PROPULSION

12.5  DF  SELF-PROPELLED VEHICLE HAVING LAND AND WATER PROPULSION MEANS (E.G., AMPHIBIOUS VEHICLE) {5}
12.51  DF  .~ Having separated propulsion means for land and water {4}
12.57  DF  .~.~ Motor driven screw propeller shaft {2}
12.59  DF  .~.~.~ By gearing {2}
12.61.~.~.~.~ Spur gearing

DEFINITION

Classification: 440/12.61

Spur gearing:

(under subclass 12.59) Subject matter wherein the toothed wheel, cylinder, or other machine element has radially projecting teeth located parallel to the rotational axis of the wheel, cylinder, or other machine element that mesh with the another toothed wheel, cylinder, or machine element.

SEE OR SEARCH CLASS

74, Machine Elements and Mechanisms, appropriate subclasses for a spur gearing arrangement, per se.