Crusher with resettable relief system

A crusher apparatus comprising:

• a material crushing portion having a first crushing portion and a second crushing portion, wherein the first crushing portion is movable relative to the second crushing portion;
• a linkage subassembly connected to said first crushing portion, said linkage subassembly having a first member and a second member, where each of said first member and said second member are connected at a pivot for relative rotational movement;
• and
• a force inducing subsystem configured to exert a counterforce of a predetermined threshold amount to said first and second members sufficient to maintain said linkage subassembly in an unrelieved position where the linkage subassembly extends longitudinally in a first direction, until a crushing force exerted on said first crushing portion is sufficient to cause said linkage subassembly to move into a relieved position, wherein the force inducing subsystem is configured to exert a force in a second direction having a primarily component perpendicular to the first direction at a mid-portion of the linkage subassembly.

A crusher apparatus comprising:

• a material crushing portion having a first crushing portion and a second crushing portion, wherein the first crushing portion is movable towards the second crushing portion;
• a linkage subassembly comprising a first end linkage member connected to the crusher apparatus, a second end linkage member connected to the first crushing portion, a first member pivotably connected to, and extending from, the first end linkage member at a first pivot, and a second member pivotably connected to, and extending from, the first member at a second pivot and the second end linkage member at a third pivot such that said second pivot is located at a mid-portion of the linkage subassembly, wherein rotation of the first member relative to the second member at the second pivot causes the second pivot to move vertically;
• and
• a force inducing subsystem configured to exert a counterforce of a predetermined threshold amount to said second pivot sufficient to maintain said linkage subassembly in an unrelieved position where said second pivot, said first member, and said second member are aligned, until a crushing force exerted on said first crushing portion is sufficient to cause said linkage subassembly to move into a relieved position where said second pivot moves vertically relative to said first pivot and said third pivot, and said first end linkage member and said first pivot moves towards said second end linkage member and said third pivot.