Hydraulic jack
United States Patent 3258921
US Patent References:
Hydraulic brake for railway cars
- - 2138263

Pump for hydraulic jacks
- - 2250551

Pumping mechanism
- - 2439796


Inventors:
Prescott, David B.
Publication Date:
07/05/1966
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Assignee:
WALKER MFG CO
Primary Class:
60/430
Other Classes:
417/568, 417/563
International Classes:
B66F3/42; F15B11/042; B66F3/24; F15B11/00