Apparatus for removing a fastener from a workpiece

Details Apparatus for removing a fastener from a workpiece Apparatus for removing a fastener from a workpiece

2005-06-28

2005-06-28

Watson, Robert C. (Department: 3723)

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

C254S018000

Reexamination Certificate

active

06910252

ABSTRACT:
An apparatus is provided for removing a fastener from a corresponding aperture defined by a workpiece that reduces or eliminates damage to the fastener and/or the workpiece. The apparatus includes a pulling plug for engaging the head of the fastener, and a drive shaft operably connected to the pulling plug. The apparatus further includes a lever member that is urged into operable contact with the workpiece. In operation, the head end of a fastener is engaged by the pulling plug. Thereafter, the lever member is moved into contact with the workpiece. The drive shaft is then retracted while the lever member continues to be urged into operable contact with and to push against the workpiece without positively engaging the workpiece. As such, the pulling plug is also moved away from the surface of the workpiece to remove the fastener from the workpiece.

REFERENCES:
patent: 2467982 (1949-04-01), Maris
patent: 3066913 (1962-12-01), Leeson
patent: 3727491 (1973-04-01), Buckwalter
patent: 4658488 (1987-04-01), Johnstead
patent: 4798106 (1989-01-01), Foster
patent: 5604967 (1997-02-01), McMahon
patent: 6601277 (2003-08-01), Swanson

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