Captured screw assembly

Details Captured screw assembly Captured screw assembly

2011-06-28

2011-06-28

Saether, Flemming (Department: 3677)

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Headed fastener element with nut, washer, securing means or cap

Headed fastener element with securing means and biasing spring

C411S999000

Reexamination Certificate

active

07967538

ABSTRACT:
A captured screw assembly is disclosed for locating a fixture plate relative to a base plate. The assembly includes a screw with a head having a diameter larger than the threaded body to form a shoulder. A bushing is frictionally engaged in an opening in the fixture plate and includes a central opening extending through the bushing and the fixture plate. The screw extends through the central opening of the bushing and threadedly engages a threaded hole in the base plate to accurately position the fixture plate relative to the base plate. The shoulder of the screw and a shoulder in the central opening of the bushing abut when the screw is fully engaged in the threaded hole. The screw and bushing include a capture feature formed therebetween to retain the screw within the bushing when the screw is disengaged from the threaded hole.

REFERENCES:
patent: 748078 (1903-12-01), Kaisling
patent: 2018346 (1935-10-01), Busby
patent: 2831520 (1958-04-01), Clarke
patent: 3561075 (1971-02-01), Selinko
patent: 4026605 (1977-05-01), Emmerich
patent: 4119131 (1978-10-01), Cosenza
patent: 4125140 (1978-11-01), Basile
patent: 4759671 (1988-07-01), Duran
patent: 5941669 (1999-08-01), Aukzemas
patent: 6406210 (2002-06-01), Parrish et al.
patent: 6709214 (2004-03-01), Angehrn

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