| 摘要 |
A fastener having a pin member and a sleeve. The pin includes a head, a pin tail portion, and a locking portion with a plurality of crests and roots. Each of the crests includes a first diameter, the first diameters sequentially increase along the locking portion towards the head, while the roots include a second diameter, the second diameters sequentially decrease towards the head. The sleeve has a head and a tubular portion which is deformed into a bulb that engages a workpiece. The tubular portion of the sleeve locks onto the crests and the pintail portion of the pin member breaks off at one of the grooves located substantially flush with the head of the sleeve. |
| 主权项 |
1. A fastener, comprising:
a pin member having a first end and a second end opposite the first end, a head at the first end, a pintail portion at the second end and having a plurality of pull grooves, and a shank intermediate the head and the pintail portion, the shank having a locking portion with a first end located proximate to the head and a second end opposite the first end of the locking portion, the locking portion having a plurality of lock grooves formed by a plurality of crests and a plurality of roots, each of the plurality of crests includes a first diameter, the first diameters of the plurality of crests sequentially increase from the second end of the locking portion to the first end of the locking portion, each of the plurality of roots includes a second diameter, the second diameters of the plurality of roots sequentially decrease from the second end of the locking portion to the first end of the locking portion; a sleeve having a tubular portion having a first end a second end opposite the first end of the tubular portion, a through bore extending from the first end of the tubular portion to the second end of the tubular portion, and a head located at the first end of the tubular portion, wherein the sleeve is adapted to receive the pin member such that the shank of the pin member is inserted within the through bore of the sleeve and the head of the pin member engages the second end of the tubular portion of the sleeve member, wherein the fastener is adapted to be installed within aligned holes of a plurality of workpieces in an installed position such that the head of the sleeve engages an accessible side of one of the workpieces, and a section of the tubular portion proximate to second end of the sleeve is deformed into a bulb that engages a blind side of another of the workpieces, and wherein the pintail portion of the pin member breaks off at one of the plurality of grooves located substantially flush with the head of the sleeve. |
