Crusher device

An impact crusher comprising:

• a frame;
• a rotating mechanism positioned adjacent to the frame, the rotating mechanism being rotatable to crush material;
• a plurality of curtains positioned adjacent to the rotating mechanism, the curtains and the rotating mechanism spaced apart to at least partially define a passageway along which material moves when being crushed by the impact crusher;
• the plurality of curtains comprising a first curtain and a second curtain, the first curtain being pivotally connected to the second curtain;
• at least one first cylinder connected to the frame, the first curtain being connected to at least one first cylinder to moveably position the first curtain;
• and
• at least one second cylinder, the at least one second cylinder connected between the first and second curtains, each cylinder of the at least one second cylinder having a piston that is moveable from an extended position to a retracted position, a distal end of the piston being connected to the one of the first curtain and the second curtain;
• and
• the piston of each of the at least one second cylinder retracting to the retracted position to automatically move the second curtain away from the rotating mechanism and toward the first curtain when a predetermined pressure threshold is detected.

A crusher device comprising:

• a frame;
• a rotating mechanism positioned within the frame, the rotating mechanism rotating to crush material;
• a plurality of curtains positioned adjacent to the rotating mechanism, the curtains and the rotating mechanism spaced apart to at least partially define a passageway along which material moves when being crushed by the crusher device;
• the plurality of curtains comprising a first curtain and a second curtain, the first curtain being pivotally connected to the second curtain;
• a hydraulic system comprised of at least one first hydraulic actuation mechanism and at least one second hydraulic actuation mechanism;
• the at least one first hydraulic actuation mechanism connected to the frame, at least one first hydraulic actuation mechanism also being connected to the first curtain to moveably position the first curtain;
• and
• the at least one second hydraulic actuation mechanism connected between the first and second curtains, each hydraulic actuation mechanism of the at least one second hydraulic actuation mechanism being moveable from an extended position to a retracted position;
• and
• at least one second hydraulic actuation mechanism retracting to the retracted position via fluid moving from the at least one first hydraulic actuation mechanism to the at least one second hydraulic actuation mechanism to automatically move the second curtain away from the rotating mechanism and toward the first curtain when a predetermined pressure threshold is detected.