Excavating – Combined or convertible
Patent
1997-03-06
1998-09-08
Carone, Michael J.
Excavating
Combined or convertible
37319, 241 27, 299 67, E02F 340, B02C 102
Patent
active
058027475
ABSTRACT:
A driving device of a jaw crusher of attachment type comprising a hydraulic cylinder having a rod connected with a movable member; a hydraulic source provided on a body of a hydraulic excavator having a mobile travel device; and a control mechanism for supplying a hydraulic pressure to the hydraulic cylinder so that the rod is extended and retracted reciprocatively and detecting a hydraulic pressure at an extension side of the hydraulic cylinder and a retraction side thereof, thus switching extension and retraction operations of the rod to each other when the hydraulic pressure at the extension side of the hydraulic cylinder or the retraction side thereof exceeds a predetermined value.
REFERENCES:
patent: 3946955 (1976-03-01), Bond
patent: 3959897 (1976-06-01), May
patent: 5237908 (1993-08-01), Kropp
patent: 5405092 (1995-04-01), Jonninen
patent: 5485689 (1996-01-01), Jonninen
patent: 5619811 (1997-04-01), Yrjola 37903
Carone Michael J.
Jacty Engineering Co., Ltd.
Pezzuto Robert
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