Cutting tool

The improvement of claim 7 wherein said laterally projecting portion is frusto-conical and has a conicity larger than the conicity of said frusto-conical surface.

In a cutting tool comprising in combination a support member, a pocket on one end of the support member, a removable cutting bit disposed in the pocket with a portion thereof exposed for cutting engagement with a workpiece, and means for holding the cutting bit in the pocket, the improvement of said holding means comprising a cylindrical recess in said support member, a pin disposed in said cylindrical recess and having an end portion in engagement with a surface of said cutting bit, a laterally projecting portion on said pin having an end in engagement with an inner surface of said cylindrical recess, and means for applying a force on the other end of said pin in a general direction holding said cutting bit in said pocket, wherein said means for applying a force on the other end of said pin comprises a peripheral thread at the end of said pin and a sleeve-like member having an internal thread in engagement with said peripheral thread, said sleeve-like member having an end face engaged with a retainer member engaged in turn with a shoulder abutment formed in said cylindrical recess, said retainer member having means preventing said pin from rotating relative to said cylindrical recess when said sleeve-like member is turned.

In a cutting tool comprising in combination a support member, a pocket on one end of the support member, a removable cutting bit disposed in the pocket with a portion thereof exposed for cutting engagement with a workpiece, and means for holding the cutting bit in the pocket, the improvement of said holding means comprising a cylindrical recess in said support member, a pin disposed in said cylindrical recess and having an end portion in engagement with a surface of said cutting bit, a laterally projecting portion on said pin having an end in engagement with an inner surface of said cylindrical recess, and means for applying a force on the other end of said pin in a general direction holding said cutting bit in said pocket comprising spring means disposed about said pin proximate said other end therof and spring retainer means maintaining said spring means in a compressed state between said spring retainer means and a shoulder abutment formed in said cylindrical recess, wherein said spring retainer means comprises a disk shaped clip, a slot extending diametrically part of the way from an edge of said clip, said slot having substantially parallel edges inserted in diametrically opposed peripheral grooves formed in said in, and a tang laterally projecting from said clip for engagement in a longitudinal slot formed in said cylindrical recess.