Metal working – Means to assemble or disassemble – Means to drive self-piercing work part
Reexamination Certificate
2005-06-14
2010-10-12
Bryant, David P (Department: 3726)
Metal working
Means to assemble or disassemble
Means to drive self-piercing work part
C029S524100, C029S796000
Reexamination Certificate
active
07810231
ABSTRACT:
A self-piercing rivet setting apparatus (9) comprises a punch (14) and a die (18) for driving a self-piercing rivet into a plurality of workpieces including a receiving-side workpiece adjacent to the die. The self-piercing rivet has a large-diameter head and a hollowed leg. The leg is driven to pierce the workpieces while allowing the front end of the leg to be expanded and deformed in its radial outward direction and to be stayed in the receiving-side workpiece without passing therethrough, to connect the plurality of workpieces with each other by the expanded leg and the head. The die includes a first die member (26) having a first cavity (25), and a second die member (30) having a second cavity (27) and a protruding pin (29) provided at the center of the second cavity. The first cavity is adapted to allow the leg of the self-piercing to be driven into the workpieces in a straight direction when the self-piercing rivet is pressed by the punch (14). The second cavity and the protruding pin are adapted to allow the leg of the self-piercing rivet being piercing the workpieces to be expanded and deformed in its radial outward direction.
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Bryant David P
Harness & Dickey & Pierce P.L.C.
Koehler Christopher M
Newfrey LLC
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