Title:
Valve cage grinder
United States Patent 2721425
Inventors:
Niel, Christensen
Publication Date:
10/25/1955
Export Citation:
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Assignee:
Edward, Benton Wilkey
Primary Class:
451/287
Other Classes:
451/159
International Classes:
B24B15/00
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US Patent References:
2424109Crankshaft grinding machine
2309615Crankshaft grinder
2249148Lathe
1902629Drum truing machine
1839775Piston refinishing machine
1831085Roll grinding machine
1702796Copying lathe
Foreign References:
DE137161C
CH229906A
DE375924C
FR906983A