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US Patent: 2,568,335
Pump lubrication for elevating screws
Patentee:
William G. Hoelscher - Cincinnati, OH

USPTO Classifications:
184/6.14

Tool Categories:
metalworking machines : drilling and boring : drill presses : radial drill presses
woodworking machines : wood drilling and boring : drill presses : radial drill presses

Assignees:
American Tool Works Co. - Cincinnati, OH

Manufacturer:
American Tool Works Co. - Cincinnati, OH

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 29, 1945
Granted: Sep. 18, 1951

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for American Tool Works Co.

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