Patent ID: 8061642

Claim:
A cutter device for a crushing machine comprising: a rotary cutter base body formed integral and able to be rotated axially, said rotary cutter base body having outer peripheral surface axially and equidistantly formed with a plurality of annular ribs, said annular ribs respectively and diametrically provided with plural flat cut surfaces along said rotary cutter base body, said flat cut surfaces respectively disposed with a protruding fixing base with a fixing hole, said flat cut surfaces formed with a first cut portion and a second cut portion, with said fixing base severing as a boundary; a plurality of cutters each of which respectively installed on a sidewall of said fixing base, each said cutter formed with a cutting side and a cutter back, said cutting side provided with at least four arc-shaped blade edges extending toward a center of each said cutter to form a bulging portion, said cutting side having a cross section formed with a double-curved surface, said cutter back bored with a combining hole, a locking member inserted through said fixing hole from another sidewall of said fixing base and firmly locked in said combining hole of said cutter back.