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US Patent: 4,715,789
High speed hydraulic fluid venting valve in a hydraulic fluid pump
Patentees: James G. Ballard (exact or similar names) - Waukesha, WI Reinald D. Liegel (exact or similar names) - Waukesha, WI USPTO Classifications: 417/253, 417/299, 60/468 Tool Categories: industrial machines : pumps : hydraulic pumps material handling : jacks : hydraulic jacks Assignees: Hein-Werner Inc - Waukesha, WI Manufacturer: Hein-Werner Inc - Waukesha, WI Witnesses: Unknown	Patent Dates: Applied: Mar. 17, 1986 Granted: Dec. 29, 1987 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hein-Werner Corp.

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