Patent ID: 7444749

Claim:
A rotary knife comprising: a knife body having a grip and a joint end, said joint end having a base tube thereon, said base tube having a through hole formed in a center thereof; a first protecting strip having a ring sleeve positioned on one end thereof, said first protecting strip having a curved edge at an opposite end thereof, said first protecting strip being connected to said base tube via said ring sleeve such that said first protecting strip rotates about said base tube; a second protecting strip having a ring sleeve at one end thereof and a curved edge at an opposite end thereof, said second protecting strip being connected to said base tube via said ring sleeve thereof such that said second protecting strip rotates about said base tube, said second protecting strip being symmetrical to said first protecting strip; a bi-fork braking component positioned between said grip and said joint end of said knife body, said bi-forking braking component having a toggle control component extending toward said grip, said bi-fork braking component having an end facing said joint end that has a first acting fork and a second acting fork, said first acting fork having an end connected to said curved edge of said first protecting strip, said second acting fork having an end connected to said curved edge of said second protecting strip; a bolt shaft extending through said through hole of said base tube, said bolt shaft having a bolt head at one end that blocks said first and second protecting strips, said bolt shaft having an end adjacent said bolt head that has a blade cover section thereon; and a round blade having a plate shape and an outer edge, said round blade having a hole in a center thereof, said round blade positioned in said blade cover section.