Greenlee Textron Inc.

Textron Innovations Inc.

Peter J Czyzewski

William F Nordlin

A punch assembly includes a punch, a sleeve, a draw stud and a die. The punch has a punch profile which provides a cutting edge that has a uniform 'sharpness' along entire perimeter of the punch. The punch assembly provides additional punch-to-die clearance over what was done in the prior art. This reduces excessive punching forces which result from axial deflection of the draw stud and 'tipping' of a large diameter punch as the draw stud deflects under a load.

Punch profile for a punch, and the assembly in which the punch is used

An auger bit includes a shaft having a central axis, a cutting insert mounted to said shaft, and a feed screw that is separate from the cutting insert and which is mounted to the shaft. The cutting insert and the feed screw are engaged with each other. A single locking member, such as a set screw, secures the feed screw member to the shaft, and thereby secures the cutting insert to the shaft. If the feed screw or the cutting insert become worn, feed screw or the cutting insert can be replaced.

Auger bit with interlocking feed screw and cutting insert

A hole saw arbor assembly connectable to a source of torque comprises an arbor having a first end and a second end. A power tool mount is disposed on the first end, and threads are disposed on the second end of a construction capable of mounting a hole saw thereon. A collar mount area is disposed on the arbor proximate to the second end, and a collar retraction area is disposed on the arbor proximate to the first end. A drive collar has a central bore therein, and the arbor is disposed through the central bore. The drive collar is capable of translation between the collar mount area and the collar retraction area, is rotatable about the collar retraction area independent of the arbor, and is incapable of rotation about the collar mount area independent of the arbor. Means for retaining the drive collar about the collar retraction area is disposed on the arbor. The drive collar has drive pins associated therewith, and the drive pins are insertable into apertures in the hole saw. Means for holding the drive pins within the apertures is disposed on the arbor.

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Rockford, IL, United States of America

Peter J Czyzewski