US PATENT SUBCLASS 384 / 491-- .~.~.~.~ Ball structure

US PATENT SUBCLASS 384 / 491
.~.~.~.~ Ball structure

Current as of: June, 1999
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384 /	HD	BEARINGS

91	DF	ROTARY BEARING {8}
445	DF	.~ Antifriction bearing {9}
456	DF	.~.~ Radial bearing {9}
490	DF	.~.~.~ Ball bearing {17}
491		.~.~.~.~ Ball structure

DEFINITION

Classification: 384/491

Ball structure:

(under subclass 490) Subject matter wherein structure other than sphericity, e.g.m hollowness, holes, or minor appendages, of a substantially spherical ball, is specified.

(1) Note. A ball surface does not have be continuous to be placed here but all surface contact areas must be an equal distance from the ball center.

SEE OR SEARCH THIS CLASS, SUBCLASS:

565, for roller structure which may have a curved surface but all surface contact area are not an equal distance from the roller center.