The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Oct. 30, 2007

Filed:

Dec. 17, 2003
Applicant:

Uwe Ratfisch, Berlin, DE;

Inventor:

Uwe Ratfisch, Berlin, DE;

Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D06F 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

Paddles are fastened on an inside of a drum casing by fastening elements. The paddles contain a hollow body, which is open in the direction of the drum casing and has a cross-sectional surface area similar to a triangle, and stiffening structures on the insides of its flanks. For secure and permanently stable fastening, in the region of at least some of the structures, strip-shaped installation parts are connected in a form-fitting manner, by way of a section located essentially parallel to the surface of the drum casing, to the inside of the flanks. Moreover, the sections have at least two fastening elements by which the paddle is fastened on the drum casing.


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