US Patent: 3,389,660
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| Pump with pressure relief
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Patentees:
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| Richard F. Van Allen (exact or similar names) - Loves Park, IL |
| Rudolph E. Gerrstrum (exact or similar names) - Rockford, IL |
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Patent Dates:
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| Applied: |
Aug. 15, 1966 |
| Granted: |
Jun. 25, 1968 |
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Jeff Joslin
Vintage Machinery entry for Greenlee Brothers & Co.
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Description: |
| The Greenlee Nos. 940 and 960 portable hydraulic pumps were used as power sources for hydraulic benders among other purposes. This patent number is listed in a 1970 catalog from Greenlee Tool Co. |
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