B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 7/00 (2006.01) B21D 7/06 (2006.01)
Patent
CA 2277526
An automatic hydraulic system 10 for the actuation of the bending beds 101, 102 hinge plate 103 and pin up plate 104 of a pipe bending apparatus. The hydraulic system 10 includes a hydraulic control circuit unit 14 that controls the operation of a pin up hydraulic ram unit 11, a bending bed hydraulic ram unit 12, and a hinge plate hydraulic ram unit 13 in response to a pair of adjustable detent main control valves 81, 82 and a sequence valve 66, and adjustable hydraulic relief valve 59.
Macpherson Leslie & Tyerman Llp
Theener Ronald E.
LandOfFree
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