Anti-kick back device

Abstract

Abstract A typical bench saw, using a removable, adjustable position guide rail is shown in a typical environment for this invention. To prevent reverse travel of the workpiece after a cut has reached a point where it is not under full operator control, a blocking device is housed in an opening of the fence guide and is spring-loaded to project a flat abutment surface thereof from the normal guide surface of the fence. A workpiece moved along the fence will cam down the blocking device because the rear portion of the blocking device is a cam surface hinged on the upstream side of the workpiece path. A second blocking device is housed in an opening in the surface of the table traversing the normal work path of a workpiece, and is hinged and spring-loaded exactly as the blocking device of the fence guide. Either one of the two blocking devices may be used separately, but the uses compliment one another. In particular, when the guide fence is placed so close to the saw blade that the fence seats over the table blocking device and holds it permanently retracted, then the fence device continues to provide full protection. It is such narrow cutting that presents the most danger and therefore the blocking device of the guide, placed just prior to the saw blade, will permit a blocking action regardless of how thin a workpiece is being cut. This benefit of narrow cut protection is opposed to the limit placed by surface grip pawls as used in the prior art. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Inventors

• 👤 Julian Lemus

Bibliographic Details