Handsaw with Pressure_Controlled handle

Abstract

The principles of our invention can be applied to both push-saws and pull-saws. More points could, of course, be used. A change in the pitch changes the ratio between forces applied parallel and perpendicular to the stroke direction, and therefore determines how aggressive the saw will behave. For hard stock, a less aggressive behavior is more efficient, decreasing the forces applied perpendicular to the stroke direction. For soft stock, a more aggressive behavior is more efficient, increasing the forces applied perpendicular to the stroke direction and decreasing the number of strokes necessary to cut through a particular piece of stock. Furthermore, the preferred embodiment of our invention allows multiple saw blades to be used with each saw for cutting a variety of materials (wood, metal, plastics, etc.).

1 . The preferred embodiment of this invention allows the handle pitch to be adjusted without the need for tools.  
     
     
         2 . As claimed in  claim 1 , the handle has a pivot point, about which it can be rotated to two or three preset points to change the pitch (see enclosed drawings).