초록 ▼

A self-piercing fastener, such as a stud bolt, for attachment to a panel or the like. The fastener includes a fastener portion, such as a threaded shank, and a self-piercing and riveting end portion. The end portion includes a central recess enclosed by a self-piercing and riveting wall on at least

A self-piercing fastener, such as a stud bolt, for attachment to a panel or the like. The fastener includes a fastener portion, such as a threaded shank, and a self-piercing and riveting end portion. The end portion includes a central recess enclosed by a self-piercing and riveting wall on at least opposed sides of the recess. The wall has an internal surface terminating in a sharp piercing edge at its distal end which is adapted to pierce an opening in the panel. The recess terminates in a bottom wall which is preferably spaced from the piercing edge of the wall a distance greater than the thickness of the panel. The fastener recess receives the slug pierced from the panel, which is deformed against the convex midportion of the bottom wall to engage the internal surface of the wall and the wall includes an arcuate drawing surface at the outer distal end adapted to draw the pierced panel edge toward the distal end of the wall as the panel in pierced, forming a mechanical interlock between the fastener and the panel.

대표청구항 ▼

A self-piercing fastener for attachment to a panel or the like, said fastener having a fastener portion a head portion terminating in and a self-piercing and riveting end portion, said self-piercing and riveting end portion having a central recess enclosed by a self-piercing and riveting wall on at

A self-piercing fastener for attachment to a panel or the like, said fastener having a fastener portion a head portion terminating in and a self-piercing and riveting end portion, said self-piercing and riveting end portion having a central recess enclosed by a self-piercing and riveting wall on at least opposed sides of said recess, said self-piercing and riveting wall having an internal surface adjacent said recess terminating in a relatively sharp piercing edge adjacent its distal end, said piercing edge adapted to pierce an opening in said panel, said recess terminating in a non-plannar bottom wall spaced from said wall distal piercing edge a distance greater than the thickness of said panel, said recess adapted to receive the slug pierced from said panel which is deformed against said bottom wall midportion to deform said slug against said wall internal surface, and the outer distal edge of said self-piercing and riveting wall including an arcuate drawing edge adapted to draw the pierced panel edge toward said distal end as the panel is pierced by said piercing edge, thereby, to retain said self-piercing and riveting end portion in said pierced panel opening.