Michael R Draper

US Patent:

6585468, Jul 1, 2003

Filed:

Feb 2, 2001

Appl. No.:

09/775485

Inventors:

H. Thad Johnson - Davisburg MI 48350
Michael J. Draper - Perry MI

Assignee:

H. Thad Johnson - Davisburg MI

International Classification:

F16B 2118

US Classification:

411353, 411361, 411533, 411999, 29437, 29510

Abstract:

A captivated fastener assembly is provided along with a technique for captivating a fastener in a workpiece. The assembly includes a fastener having a head, a shank extending from said head that has an upper unthreaded shank portion and a lower threaded shank portion, wherein the diameter of the outer tips of the threads of the lower threaded shank portion exceed the diameter of the upper unthreaded shank portion. The assembly further includes a workpiece having a sleeve with an internal bore with a diameter slightly larger than the diameter of the fastener shank so that the sleeve can be received over the shank. The sleeve also includes segments that deform inwardly in response to a predetermined compressive force, thereby forming a plurality of deformed segments that protrude inwardly. Thus, the plurality of deformed segments provide an inner diameter that is less than the diameter of the outer tips of the threads of the lower threaded shank portion, thereby holding the fastener captive.

US Patent:

20030194293, Oct 16, 2003

Filed:

May 19, 2003

Appl. No.:

10/440839

Inventors:

H. Johnson - Davisburg MI, US
Michael Draper - Perry MI, US

International Classification:

F16B021/18

US Classification:

411/353000

Abstract:

A captivated fastener assembly is provided along with a technique for captivating a fastener in a workpiece. The assembly includes a fastener having a head, a shank extending from said head that has an upper unthreaded shank portion and a lower threaded shank portion, wherein the diameter of the outer tips of the threads of the lower threaded shank portion exceed the diameter of the upper unthreaded shank portion. The assembly further includes a workpiece having a sleeve with an internal bore with a diameter slightly larger than the diameter of the fastener shank so that the sleeve can be received over the shank. The sleeve also includes segments that deform inwardly in response to a predetermined compressive force, thereby forming a plurality of deformed segments that protrude inwardly. Thus, the plurality of deformed segments provide an inner diameter that is less than the diameter of the outer tips of the threads of the lower threaded shank portion, thereby holding the fastener captive.