US Patent: 2,922,258 - Grinder with oscillating head


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US Patent: 2,922,258

Grinder with oscillating head

Patentees:

Ramsay M. Bell (exact or similar names) - Schoolcraft, MI

Miles M. Bass (exact or similar names) - Kalamazoo, MI

Lee C. Hammond (exact or similar names) - Kalamazoo, MI

Philip J. Robischung (exact or similar names) - Kalamazoo, MI

USPTO Classifications:

451/159, 451/294, 451/414

Tool Categories:

metalworking machines : grinders : tool grinders

metalworking machines : electrochemical machining

Assignees:

Hammond Machinery Builders, Inc. - Kalamazoo, MI

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Mar. 29, 1956
Granted:	Jan. 26, 1960

Patent Pictures:

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Description:

This patent tool grinder used a mix of conventional and electrochemical (ECM) material removal, and it was probably the second commercially available ECM product, after one made by Anocut Engineering, Inc., of Downer's Grove, IL.; see patent 2,826,540 for the technology behind the Anocut machine.