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US 6,913,215 B2Granted
Method and apparatus for tumbling concrete products
AssigneeColumbia Machine, Inc.
InventorsStacy L. Gildersleeve, Tomas A. Glascoe
Life of this patent
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Abstract
A tumbler for tumbling concrete products comprises a rotatable cylindrical drum having an input end that is slightly elevated relative to an output end. Tire retread strips are placed side-by-side on the radially inner surface of the drum and extend along its length. Clamps having lateral arms extending on either side are engaged with lateral tread grooves on the strips. The clamps are bolted to the drum between adjacent strips thereby securing the strips to the radially inner surface of the drum.
Claims5
A method for lining a drum comprising:
- laying tire treads having lateral tread grooves on the inner drum surface adjacent one another;
- providing a clamp having a first lug extending laterally from one side thereof and a second lug extending laterally from the other side thereof;
- positioning the first lug within a first lateral groove on a first tire tread;
- positioning the second lug within a second lateral groove on a second tire tread adjacent the first tire tread;
- clamping the adjacent tire treads to the inner drum surface by compressing the tire tread between the lugs and the inner drum surface along the edge of each tire tread.
2 more elements
Dependencies are inferred from the claim text.