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:
Oct. 10, 2006
Filed:
Jan. 24, 2000
Stephen C. Dassoulas, Lutherville, MD (US);
John R. Curtsinger, Shelbyville, KY (US);
Stefan Nock, Baltimore, MD (US);
Dean Edwards, Bel Air, MD (US);
Laura Lindberg, Legal Representative, Rockville, MD (US);
Steve Mcclaskey, Baltimore, MD (US);
Stephen C. Dassoulas, Lutherville, MD (US);
John R. Curtsinger, Shelbyville, KY (US);
Stefan Nock, Baltimore, MD (US);
Dean Edwards, Bel Air, MD (US);
Laura Lindberg, legal representative, Rockville, MD (US);
Steve McClaskey, Baltimore, MD (US);
Black & Decker Inc., Newark, DE (US);
Abstract
An improved circular saw blade designed for cutting fiber cement workpieces, which are becoming more and more prevalent on the construction site, includes a PCD/carbide tip () mounted in the rim () of the saw blade () at six, rather than the usual for locations, equally spaced around the blade. The tips are mounted adjacent a relatively large-diameter, semi-circular gullet (), which itself is preceded by a chip and dust minimizer (). The minimizer includes several alternating hills () and valleys () formed in the rim of the saw blade, each hill and valley having the same radius, producing a sinuous array essentially centered on the rim of the blade. It has been discovered that such a dust and chip minimizer reduces the level of dust and chips produced by the blade and clears the same from the kerf generated in the blade-workpiece interface. Ideally, all of the parameters and relief angles for the surfaces on the saw blade tip can be generated by cutting an array of such tips from a large-diameter blank () of PCD fused to a layer of tungsten carbide (), and by mounting the tips onto the blade in such an orientation as to present, preferably, a negative hook or rake angle () to the workpiece.