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US 4,378,184 AGranted
Rotary tool cutting insert
OwnerLeonard A. Brieseinventor
Life of this patent
Estimating the term…
Abstract
An improved cutting insert for rotary cutting tools is disclosed. The cutting inserts are characterized by a center bushing made of metal that is softer than the conventional sintered tungsten carbide or titanium carbide used for the cutting body of the inserts. The center bushing may be secured on each cutting insert by using braising, shrink fitting, oxidation bonding, or high energy bonding techniques. Additionally, conventional plating techniques may be used.
Claims5
A cutting insert for rotary cutting tools, said cutting insert comprising:
- a cutting body having a washer-like configuration including an interior aperture;
- center bushing means for forming a central aperture for said cutting insert, said center bushing means being securely positioned in said interior aperture of said cutting body;
- and
- an expansion bushing interposed between said cutting body and said center bushing means, said expansion bushing serving to securely position said center bushing means in said interior aperture of said cutting body, said expansion bushing including an interior portion and an expansion slot for permitting radial expansion of said expansion bushing when said center bushing means is seated in said interior portion of said expansion bushing, said interior portion of said expansion bushing being tapered, said center bushing means having an outer surface adapted to be contiguous with said interior portion of said expansion bushing when said center bushing means is seated in said interior portion, said outer surface of said center bushing means being tapered to conform to the taper of said interior portion of said expansion bushing.
1 more element
Dependencies are inferred from the claim text.