TODAY’S PATENT – ADJUSTABLE BLADE KNIFE
This invention “Adjustable blade knife” was invented by James L. Richards and assigned to Pacific Handy Cutter Inc, was granted patent on 16th May, 1978 by the USPTO bearing patent grant number US4089112A to the patentee. The present invention relates to an adjustable blade knife that is made by extruding a continuous strip of extrudable hardenable material, the strip having a planer web between thicker marginal portions and opposing slots in the marginal portions, individual knife handle bodies are stamped from the strip, and a knife blade is assembled to each body by inserting the blade in the opposed slots of the body.
In the present invention, a generally planer-shaped stamped spring steel slide plate is positioned against the cutting blade in a side-by-side preassembled condition, with detent means inter engaging between the two. The plate and blade subassembly is then slid into the handle body slots to produce an assembled knife. The slide plate and blade subassembly are then placed along the length of the extruded handle body using the current approach, which involves inter engagements between a manually movable element on the slide plate and the aforementioned irregularities of the web slot sidewall.