Patent ID: 8777533

Claim:
A blind fastener, comprising: a core bolt having an elongated shank with a first end, a second end opposite the first end, a head located at the first end, and a threaded portion located at the second end; and a sleeve having an elongated body with a first end, a second end opposite the first end of the elongated body, an exterior surface extending from the first end of the elongated body to the second end of the elongated body, a head located at the first end of the elongated body, an internal threaded portion located at the second end of the elongated body, and a tapered notch formed within the exterior surface intermediate the first and second ends of the elongated body and defined by a tapered portion, wherein the core bolt is adapted to be installed within the sleeve such that the threaded portion of the core bolt engages threadedly the internal threaded portion of the sleeve, wherein the fastener is adapted to be installed within openings of a plurality of workpieces, such that the head of the sleeve engages an accessible side of one of the plurality of workpieces, the head of the core bolt engages the head of the sleeve, and the second end of the elongated body of the sleeve extends from a blind side of another of the workpieces, wherein during installation of the fastener within the plurality of workpieces, a bulb is formed on the elongated body of the sleeve, the bulb defining a portion of a bulbed portion which extends from the bulb to the second end of the elongated body of the sleeve, and wherein a remaining portion of the elongated body extending from the bulb to the first end of the elongated body defines a body portion, wherein the bulbed portion and the body portion are connected integrally with one another, wherein when a selected axial force applied to the fastener is reached, the bulbed portion separates from the body portion and thereafter engages the tapered portion axially and in a direction towards the first end of the elongated body, thereby increasing the diameter of the bulb, and wherein when the fastener is in an installed position, the bulb engages the blind side of the another of the workpieces.