Blind rivet with a plastic rivet body
AssigneeNewfrey LLC
InventorsReimar Saltenberger, Johann A. Reindl, Stephan Schneider
Life of this patent
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Abstract
A blind rivet made of plastic, the shank of the body has a first region located between the head and the foot end, and the first region has a reduced first wall thickness. Within the first region is located a second region with a second wall thickness further reduced as compared to the first region. The first and second regions are arranged such that, as a result of the rivet setting process, the wall of the shank forms a roll fold with an annular bead that is pressed axially against the blind side of the workpiece.
Claims20
A blind rivet for joining by a rivet setting process a first workpiece including an accessible side and a second workpiece including a blind side, the blind rivet comprising:
- a hollow rivet body made of plastic, the body including:
- an elongated shank that defines an axial bore that extends coaxially to a longitudinal center axis of the blind rivet;
- a head extending radially from a first end of the shank for contact with the accessible side of the first workpiece;
- and
- a foot end located at a second end of the shank and passable through an opening formed through the first workpiece and second workpiece, and the blind rivet further comprising:
- a mandrel slidably located in the bore of the rivet body, the mandrel including:
- a mandrel shank with a drawing end projecting out of the head of the rivet body;
- a mandrel head that stands in operative connection with the foot end of the rivet body in order to transmit a force to the rivet body during the rivet setting process, and:
- characterized in that the shank of the rivet body, between the head and the foot end, includes
- a first region with a first wall thickness reduced as compared to a head section of the shank and the foot end;
- a second region, located within the first region, and with a second wall thickness reduced as compared to the first wall thickness of the first region;
- and
- the bore of the rivet body further includes:
- a first conical bore section defining a first diameter that increases towards the foot end, and a second conical bore section opposed to the first conical bore section and defining a second diameter that decreases towards the foot end, and wherein the ends of the first conical bore section and second conical bore sections with greatest diameter a roach a transition point in the shank that is located axially between the second region and the foot end.
A blind rivet for joining by a rivet setting process a first workpiece including an accessible side and a second workpiece including a blind side, the blind rivet comprising:
- a mandrel defining a central longitudinal central axis of the blind rivet, and including a mandrel shank with a drawing end and a mandrel head, and:
- a hollow rivet body made of plastic, the body including:
- a tubular elongated shank that defines an axial bore that extends coaxially around the longitudinal center axis of the blind rivet;
- a head extending radially from a first end of the shank for contact with the accessible side of the first workpiece;
- a foot end located at a second end of the shank and passable through an opening formed through the first workpiece and second workpiece;
- and
- wherein the shank of the rivet body, between the head and the foot end, includes:
- a head section proximate the head with a first wall thickness;
- a foot section proximate the foot end with a second wall thickness;
- a first intermediate region located axially between the head section and the foot section and with a third wall thickness less than the first wall thickness and the second wall thickness;
- and
- a second intermediate region, located axially within the first region, and with a fourth wall thickness less than the third wall thickness;
- and
- wherein the bore of the rivet body includes:
- a first conical bore section defining a first diameter that increases towards the foot end;
- a second conical bore section opposed to the first conical bore section and defining a second diameter that decreases towards the foot end;
- and
- wherein the ends of the first conical bore section and second conical bore sections with greatest diameter approach a transition point that is located axially between the second intermediate region and the foot end.
Dependencies are inferred from the claim text.