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:
Jan. 29, 1991
Filed:
Sep. 15, 1989
Kevin J Colligan, Snoqualmie, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
A cutter body (22, 22') has a slot (26, 26') opening onto its nominal outer cylindrical surface (24) and extending along a plane that intersects the cutter axis (X) at an acute axial rake angle (A). A flat cutter blade insert (40) with an elliptical polycrystalline diamond cutting edge (48) is secured in the slot (26, 26'). The insert (40) is positioned to produce a non-negative radial rake at each point along the cutting edge (48). Preferably, the cutter (20, 20') has a plurality of circumferentially spaced slots (26, 26') and inserts (40). The slots (26') may be arranged in a herringbone pattern to resist delamination of a workpiece. Preferably, the cutter relief angle varies along the insert (40) from a minimum at the leading end (50) to a value at the trailing end (52) equal to the minimum plus the angle between the radial lines of the cylinder (24) through the leading and trailing ends (50, 52), respectively.