US 5,664,734 AGranted

Crusher apparatus

AssigneeNippon Pneumatic Manufacturing Co., Ltd.

InventorsHiroshi Terada, Takehiko Kawano

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Abstract

A crusher having a bracket pivotally mounted on a free end of an arm of a civil engineering machine, a frame having a pair of support plates and rotatably mounted on the bracket, a lock arm having a pair of arm plates and pivotally mounted between the pair of support plates, the lock arm carrying at one end thereof a crushing jaw, a movable arm mounted between the arm plates of the lock arm so as to be pivotable about a first axis that is nearer to the tip of the arm than a second axis about which the lock arm pivots, a trunnion type drive cylinder mounted between the arm plates for pivoting the movable arm toward and away from the crushing jaw, the drive cylinder having pivots arranged on the second axis and pivotally supporting the lock arm, and a fixing means for fixing the lock arm to the frame at both ends of the pivoting motion of the pivot shaft about the second axis. The ends are separated a predetermined angle from each other.

Claims9

Dependent claims

A crusher comprising:

a bracket capable of being pivotally mounted on a free end of an arm of a self propelled machine;
a frame, rotatably mounted on said bracket, including a pair of support plates;
a lock arm pivotally mounted between said pair of support plates of said frame and having a pair of arm plates, said lock arm carrying at a front end thereof a crushing jaw and being pivotable about a first axis between a first position and a second position;
a movable arm pivotally mounted between said arm plates of said lock arm so as to be pivotable about a second axis which is located nearer to said front end of said lock arm than said first axis about which said lock arm pivots;
a trunnion type drive cylinder mounted between said arm plates of said lock arm for pivoting said movable arm relative to said crushing jaw, said trunnion type drive cylinder having a pair of pivot members which are aligned with said first axis;
and
a fixing means for fixing said lock arm to said frame at said first position and at said second position, wherein said lock arm can be pivoted from said first position, through a predetermined angle, to said second position.

4 more elements

Dependencies are inferred from the claim text.