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.
Patent No.:
Date of Patent:
Feb. 20, 1990
Filed:
May. 12, 1986
Tim M Uyeda, Rosemead, CA (US);
Klaus W Gartner, Palos Verdes Estates, CA (US);
Peter J Phillips, Redondo Beach, CA (US);
Other;
Abstract
The tumbler wheels have a plurality of false gates, each having a width, depth and/or angular position feature which is a random value selected from within given circumferential, radial and/or angular locational limits, respectively, to foil sophisticated sound wave analyzers. Additonally, the wheel may include an outer periphery whose radius between pairs of adjacent gates is randomly variable within given limits. A method and apparatus for producing the random wheels in large batches includes spindling a large number of blank wheels on an arbor and randomly rotating the arbor selectively relative to a cutting tool which is randomly movable selectively in two axes.