US Patent: 2,343,577 - Grinding Machine


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US Patent: 2,343,577

Grinding Machine

Patentee:

John E. Poorman (exact or similar names) - Philadelphia, PA

USPTO Classifications:

451/393, 74/324

Tool Categories:

metalworking machines : grinders : surface grinders

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Aug. 10, 1942
Granted:	Mar. 07, 1944

Patent Pictures:

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Description:

Claim:

This invention is directed to an improvement in grinding machines, wherein provision is made for so controlling the mechanism to insure absolute precision in grinding, and is more particularly concerned with means for reversing the operation of the grinding machine following a predetermined and precise limit of grinding movement, to permit absolute precision grinding and machine reversal following such precision grinding limit.