Back to results
US 11,559,836 B2Granted
Pull-type blind fastener with preload performance
AssigneeAllfast Fastening Systems, Inc.
InventorsPaul Keller, Gregory Athas, Bob Flores, Dave McNab, Ramon Munoz
Life of this patent
Estimating the term…
Abstract
A blind pull type fastener includes a pin, a sleeve, a collar, and a bulb-forming portion. The pin includes a head. The pin is pulled so that the head applies force to the bulb-forming portion. The bulb-forming portion is deformed to form a bulb. The collar is deformed into a void of the sleeve. The pin includes locking rings. The collar is deformed to lock with the locking rings.
Claims8
A pull-type blind fastener comprising:
- a pin comprising:
- a gripping portion;
- a pin head;
- and a body extending from the pin head to the gripping portion, wherein the body includes a plurality of axially spaced annular rings so that one of the axially spaced rings serves as a variable break location;
- a collar comprising an internal collar bore that operatively receives the pin;
- a sleeve comprising an internal sleeve bore that operatively receives the pin;
- and
- a bulb-forming portion disposed between the pin head and the sleeve, with the bulb forming portion having a hollow cylindrical body with a constant outer diameter and an inner diameter that gradually reduces from an internal frustroconical surface at an edge of the body coming into contact with the sleeve to a final narrowed diameter at an edge of the body coming into contact with the pin head;
- wherein the sleeve is disposed between the bulb-forming portion and the collar;
- and
- wherein a volume of the collar is selected so that, after the pull-type fastener is installed and the body breaks at the variable break location, the collar deforms and is completely disposed within a void space defined by a frustoconical inner bore of the sleeve and the pin, thereby creating a substantially flush surface.
8 more elements
Dependencies are inferred from the claim text.