US Patent: 3,044,790 - Chuck and operating key with enlarged pilot


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US Patent: 3,044,790

Chuck and operating key with enlarged pilot

Patentee:

Arthur M. Stoner (exact or similar names) - Madison, CT

USPTO Classifications:

279/147, 279/61, 29/893

Tool Categories:

woodworking tools : hand drills : drill chucks

Assignees:

Jacobs Mfg. Co. - West Hartford, CT

Manufacturer:

Jacobs Mfg. Co. - West Hartford, CT

Witnesses:

Unknown

Patent Dates:
Applied:	Feb. 24, 1959
Granted:	Jul. 17, 1962

Patent Pictures:

USPTO (New site tip)
Google Patents
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Vintage Machinery entry for Jacobs Mfg. Co.

Description:

This patent covers the use of an enlarged pilot hole for the chuck key; the benefit is to be able to skip the hardening of the chuck body, thus reducing cost.