US Patent: 2,206,292 - Method of Making a Drill Sleeve


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US Patent: 2,206,292

Method of Making a Drill Sleeve

Patentee:

Benjamin F. Rosenberg (exact or similar names) - Chicago, Cook County, IL

USPTO Classifications:

72/340, 72/378, 76/108.1

Tool Categories:

metalworking machines : drilling and boring : drilling and boring tool holders

Assignees:

Scully-Jones & Co. - Chicago, Cook County, IL

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	May 13, 1938
Granted:	Jul. 02, 1940

Patent Pictures:

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"Vintage Machinery" entry for Scully-Jones & Co.

Description:

Claim:

The herein described method of forming a drill sleeve or the like which comprises making a blank having a tapered outer surface and having an annular recess extending inwardly from the large end thereof, the sides of the recess being substantially parallel to the sides of the blank, then placing the blank in a die having a hole of exactly the same conformation as the blank throughout the larger portion thereof and having a slot in one side, then placing a mandrel of exactly the same shape as the recess, except that one side thereof is flattened longitudinally of the mandrel, in the recess, and then projecting a punch through the slot in the die to cause the adjacent portion of the blank to be forced inwardly against the flattened side of the mandrel while all other surfaces of the blank are prevent-b5 ed from deformation or relative movement.