Patent ID: 6735872
Filing Date: 2004-05-18
Classification: B26B

Abstract:
An improved cutter knife comprising an upper shell and a lower shell that are coupled to form a body, the body having one end forming a handgrip conforming to ergonomics to allow positive and inverse gripping, the handgrip having a blade anchor section and a blade fast change section on one end thereof;wherein the blade fast change section is located above the blade anchor section, the blade anchor section having a blade trough which has two sides extending to form respectively a lug which couples with a spring and a bucking member, the bucking member having a stub to latch on a notch formed on a blade, the bucking member further having a hole on another end apart from the stub to couple with two ends of a beam, the beam being depressable by a control button located thereabove, the control button has a lower side coupling with a spring which is housed in a hole formed on the upper shell; wherein the blade is replaceable rapidly and the edge of the blade is turnable in an inverse manner to be inserted into the body such that the notch is engageable with each of the stubs located on two sides of the blade trough for anchoring the blade so that the handgrip is permitted to be gripped in an inverse manner to perform heavy duty cutting at a greater force.