B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 7/06 (2006.01) B21D 5/02 (2006.01) B30B 15/10 (2006.01)
Patent
CA 2349250
A press brake is comprised of a frame having a bed secured thereto with a ram displaceable to and away from the bed whereby to form metal sheets positioned on the bed. The ram is secured to a hydraulic piston through opposed symmetrical linkage assemblies. Each linkage assembly is connected adjacent opposed ends of the ram and includes a lever member pivotally secured to the frame by an anchor pin pivot connection. A link arm interconnects the lever member to the ram by pivot pin connections adjacent opposed ends of the link arm. An interconnecting bar interconnects the lever member of each linkage assembly together by a further pivot pin connection adjacent opposed ends of the interconnecting bar. The ram displacement piston has a piston rod end which is connected to the interconnecting bar by a pivot pin whereby to displace the interconnecting bar to cause the linkage assemblies to pivot in unison on their anchor pin pivot connection to cause the ram to be displaced in substantially perfect parallel relationship with the bed. The symmetrical linkage assemblies have identical pivot pin and anchor pin connections whereby wear of these connections during operation is substantially the same on opposed sides of the ram to ensure continuous parallel displacement of the ram.
Fritsch Rudy
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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