US PATENT SUBCLASS 152 / 67-- .~.~.~.~ With drive

US PATENT SUBCLASS 152 / 67
.~.~.~.~ With drive

Current as of: June, 1999
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152 /	HD	RESILIENT TIRES AND WHEELS

1	DF	SPRING WHEELS {3}
17	DF	.~ Spring encircling rigid annulus {10}
53	DF	.~.~ Pneumatic spring {3}
56	DF	.~.~.~ Annular {4}
67		.~.~.~.~ With drive {1}
68	DF	.~.~.~.~.~> Anti-creep

DEFINITION

Classification: 152/67

In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring, said rigid annulus is held against rotation relative to the wheel center, either my modification of wheel or spring elements or by additional means. This subclass includes drive through the springs.

(1) Note. For such devices wherein the drive is by means of friction, cement or vulcanization and involves no modification of wheel or spring elements, see this class, subclasses 56-59.