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US 7,406,989 B1Granted
Cart wheel with static dissipative mechanism
AssigneeP & H Casters Co., Inc.
InventorJorge Casaus
Life of this patent
Estimating the term…
Abstract
A wheel for a cart has a static dissipative mechanism. The wheel has a hub that has a central bore for receiving one or more bearings. The outer periphery of the hub has a conductive ring that has projections extending radially outward. The projections are surrounded by a tread material. A conductive wire extends from the central bore where the bearings are, on the outside of the hub, to the conductive ring. A conductive path is provided for the cart through the bearings, the wire, the conductive ring to ground.
Claims9
A wheel for a cart, comprising:
- a) a hub having a central bore structured and arranged to receive a bearing and an axle, the hub made of a nonconductive material;
- b) a conductive ring located on an outer periphery of the hub, the conductive ring having projections that extend radially outward;
- c) a tread that encompasses the outer projections, the outer projections having ends that are exposed at an outer circumference of the tread, the tread made of a nonconductive material;
- d) a second conductor that extends from the central bore of the hub to the conductive ring, the second conductor having a central portion that is located on an exterior of the hub, an electrical conductive path is provided from the central bore of the hub to the tread outer circumference.
1 more element
A method of making a wheel for a cart, comprising the steps of:
- a) providing a hub made of a nonconductive material, the hub comprising a central bore for receiving a bearing;
- b) installing a conductive ring on a circumference of the hub, the ring comprising conductive projections that extend out from the hub;
- c) positioning a second conductor on the hub and extending from the central bore to the conductive ring;
- d) forming a tread on the circumference of the hub, the tread retaining the conductive ring and the second conductor in place, the tread not overlaying outer ends of the conductive ring projections;
- e) inserting a bearing into the central bore so as to contact the bearing with the second conductor and form a conductive path from the bearing to the wheel outer circumference.
2 more elements
Dependencies are inferred from the claim text.