US Patent: 3,898,771 - Grinding Machine


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US Patent: 3,898,771

Grinding Machine

Patentee:

Martin L. Kuniholm (exact or similar names) - Worcester, Worcester County, MA

USPTO Classifications:

451/24, 60/413

Tool Categories:

metalworking machines : metalworking machine mechanisms : hydraulic apparatus

metalworking machines : grinding machines

Assignees:

Cincinnati Milacron-Heald, Corp. - Worcester, Worcester County, MA

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Nov. 19, 1973
Granted:	Aug. 12, 1975

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Heald Machine Co.
"Vintage Machinery" entry for Cincinnati Milling Machine Co.

Description:

Abstract:

A grinding machine of the controlled-force type having a hydraulic system permitting change from low force to high force grinding in which an air trap is provided in the hydraulic system to cause the force to change relatively slowly from low force to high force.