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US 7,854,435 B2Granted
Wheel mechanism
OwnerColin Alan Campbellinventor
Life of this patent
Estimating the term…
Abstract
A wheel mechanism having two or more rows of three or more wheels wherein the lower-most points of the wheels in a row an arc. The wheels may be disposed on runners affixed to a cart or be attached directly to a frame or floor component of the cart. An arced shape can be implemented by varying the diameter of the wheels or the attachment components. The wheel mechanism can be incorporated into various types of carts.
Claims23
A cart comprising:
- a platform;
- a propulsion device;
- two or more rows of three or more non-swivelable wheels wherein the lower-most points of the wheels in a row form an arc;
- wherein the wheels are disposed on one or more arced runners extending longitudinally along at least a portion of the platform;
- and
- two or more additional wheels adjustably affixed to the cart, having a first adjusted position to allow the cart to rock on the arced runners, and a second adjusted position to prevent rocking on the arced runners but to allow the cart to roll, wherein the lower most point of the additional wheels are in line with at least the lower most point of one wheel in the arc.
3 more elements
A dolly comprising:
- a platform;
- two or more rows of three or more non-swivelable primary wheels wherein the lower-most points of the wheels in a row form an arc;
- the wheels are disposed on one or more arced runners extending longitudinally along at least a portion of the platform;
- and
- one or more end wheels;
- two or more additional wheels adjustably affixed to the dolly, having a first adjusted position to allow the dolly to rock on the arced runners, and a second adjusted position to prevent rocking on the arced runners but to allow the dolly to roll, wherein the lower most point of the additional wheels are in line with at least the lower most point of one wheel in the arc.
3 more elements
Dependencies are inferred from the claim text.