Twin impression push nut

Details Twin impression push nut Twin impression push nut

1999-03-25

2001-04-24

Browne, Lynne H. (Department: 3629)

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

Fastener securing element

Resilient metallic

C411S084000, C411S528000

Reexamination Certificate

active

06220806

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to fasteners generally, and more specifically, to push nut fastener.
DESCRIPTION OF THE RELATED ART
Push nut fasteners are well known and widely used in the art. They are used in a multitude of applications, from furniture to auto parts. Push nut fasteners are reliable, inexpensive, and provide an alternative to threaded fasteners such as bolts and screws. Exemplary push nut fasteners are described in U.S. Pat. Nos. 4,826,379 to Norden, 5,195,860 to Steyn, 5,803,692 to Postadan and 5,833,422 to Haga et al., all of which are incorporated by reference herein, in their entireties.
Typically, a push nut fastener is used in conjunction with an elongate cylindrical post which has no threads. The push nut has a hole or gripping opening for receiving the post. The gripping opening typically includes a plurality of blades or teeth extending into the gripping opening for contacting and securing the post. The blades of the gripping opening typically form a shape like a truncated cone. These teeth are constructed in such a way that the push nut easily slides onto the post, but is very difficult to slide in the opposite direction or remove.
Prior art push nut fasteners typically include a single hole or gripping opening formed therein. If multiple gripping openings are included on a single body, it may be difficult to align the push nut with two separate posts. A push nut which can accommodate more than one post without the attendant alignment problems is desired.
SUMMARY OF THE INVENTION
The present invention is a push nut fastener having first and second gripping openings formed therein, wherein the first gripping opening is substantially circular and the second gripping opening is substantially rectangular.


REFERENCES:
patent: 2144350 (1939-01-01), Swanstrom
patent: 2503854 (1950-04-01), Trainor
patent: 2763031 (1956-09-01), Rekettye
patent: 3290109 (1966-12-01), Vanegas
patent: 3510823 (1970-05-01), Cervenka et al.
patent: 3648559 (1972-03-01), Hudnall
patent: 4725177 (1988-02-01), Becker
patent: 4728236 (1988-03-01), Kraus
patent: 4826379 (1989-05-01), Norden
patent: 4860513 (1989-08-01), Whitman
patent: 5195860 (1993-03-01), Steyn
patent: 5423647 (1995-06-01), Suzuki
patent: 5502942 (1996-04-01), Gras et al.
patent: 5803692 (1998-09-01), Postadan
patent: 5833422 (1998-11-01), Haga et al.

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