E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
61/89
E02D 7/08 (2006.01) E02D 7/10 (2006.01)
Patent
CA 1268343
ABSTRACT In a hydraulic pile driver (10), the lifting cylinder (34) acting on the driving weight (12) has an attached position indicator (46, 50), which produces a signal corre- sponding to the momentary position of the piston rod (32) of the lifting cylinder (34). This signal is used for reversing a 4/3-valve, by which the two working chambers of the lifting cylinder can be connected to a pressure line or return line.
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Hennecke Rudolf
Kehrberger Achim
Delmag Maschinenfabrik Reinhold Dornfeld G.m.b.h. & Co
Goudreau Gage Dubuc
Hennecke Rudolf
Kehrberger Achim
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