Metal deforming – With cutting – By composite tool
Patent
1995-07-20
1998-02-17
Larson, Lowell A.
Metal deforming
With cutting
By composite tool
29514, 29521, 72294, 7245316, B21D 3102
Patent
active
057181420
ABSTRACT:
A hand-held portable power tool for use in an operation for joining and fastening two or more abutting steel plates, the tool comprises: a housing unit; a clamp, a punch, a power mechanism and a punch actuator. The clamp is mounted on the housing unit and is movable from an open position to a clamped position. The clamped position is a position that enables the clamp to hold the abutting steel plates together and prohibit them from moving in relationship to each other. The punch is mounted within the housing unit and has a hollow ground chisel shape. The power mechanism is engageable with the punch and the clamp. The power mechanism is of sufficient capacity to clamp and hold the abutting steel plates together and to drive the punch through the abutting steel plates. The punch actuator is actuatable from an off position to an on position. When the punch actuator is actuated to the on position, the power mechanism engages with the clamp and moves the clamp to the clamped position holding the abutting steel plates together and the power mechanism engages with the punch and drives the punch through the abutting steel plates, wherein an end of the punch that has the hollow ground chisel shape is used to penetrate the steel plates. The punch has a piercing lead-in tip for entering a back end of holes to be punched in the abutting steel plates, whereby when the piercing lead-in tip is driven by the power mechanism into the steel plates, material is punched out of the steel plates to form holes and is progressively moved to form abutting spiral shaped cut-out steel plate segments in locked fastening engagement to secure the abutting steel plates in unitary assembly.
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Larson Lowell A.
Meroni, Jr. Charles F.
Paradiso John
Toczycki Robert
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