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US Patent: 675,528
Valve Device for Pneumatic Hoists
Patentee: Robert A. Rutherford (exact or similar names) - Philadelphia, PA USPTO Classifications: 137/627.5, 91/20, 91/390, 91/417R, 91/450 Tool Categories: industrial tools : industrial valves material handling : hoists, winches, come-alongs Assignees: Pedrick & Ayer Co. - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Oct. 11, 1900 Granted: Jun. 04, 1901 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Pedrick & Ayer

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