TODAY’S PATENT – REPLACEABLE BLADE KNIFE
The REPLACEABLE BLADE KNIFE was invented by John R. Decker (San Jose, CA) on the 3rd of March 1987, bearing patent number US4646440A.
This invention relates generally to cutting tools and specifically to an improved precision cutting knife having a blade that can be positively secured to a handle, is easily replaceable, and is safely storable.
The invention consists of a knife having an elongated handle with a narrow channel open at one side near one end; a spring steel blade carrier that is slidably received by the channel and a blade detachably secured to the blade carrier by a tab in the blade shank. An internally projecting nub from the handle and two laterally projecting shoulders on the knife blade that helps push the blade out when needed. The blade can also be pushed out to replace it if needed or reversed into the shank for safe storage and for carrying it on person.