Double quarter turn fastener

Details Double quarter turn fastener Double quarter turn fastener

2001-05-24

2003-05-27

Saether, Flemming (Department: 3679)

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

C411S553000

Reexamination Certificate

active

06568893

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention pertains to a two-stage quarter turn fastener which is used to fasten adjacent panels to each other.
2. Description of the Prior Art
In the prior art, it is known to use a fastener to secure adjacent panels to each other. Quarter turn fasteners are frequently used, particularly when square apertures are formed in the panels. However, such prior art fasteners typically have not been able to accommodate a range of panel thicknesses. Moreover, such prior art fasteners typically have not been configured to remain fastened to a first panel without being fastened to the second panel.
Examples of prior art include U.S. Pat. No. 5,897,278 entitled “Turn Fastener”, issued on Apr. 27, 1999 to Frattarola; U.S. Pat. No. 5,011,356 entitled “Panel Fastener”, issued on Apr. 30, 1991 to Fernandez; U.S. Pat. No. 4,981,405 entitled “Fastener For Securing Panel-Like Members”, issued on Jan. 1, 1991 to Kato; U.S. Pat. No. 4,938,645 entitled “Tee Tree Fastener”, issued on Jul. 3, 1990 to Wollar; U.S. Pat. No. 4,810,147 entitled “Fastener for Plates”, issued on Mar. 7, 1989 to Hirohata; U.S. Pat. No. 4,762,437 entitled “Fastener”, issued on Aug. 9, 1988 to Mitomi; and U.S. Pat. No. 4,652,192 entitled “Expandable, Plastic Panel Fastener”, issued on Mar. 24, 1987.
OBJECTS AND SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a quarter turn fastener configuration which can engage panels over a range of thicknesses.
It is therefore a further object of the present invention to provide a quarter turn fastener which can engage two panels or a single panel.
It is therefore a still further object of the present invention to provide a quarter turn fastener which can be reliably and intuitively operated.
It is therefore a final object of the present invention to provide a quarter turn fastener which can be manufactured economically.
These and other objects are attained by providing a fastener assembly with two quarter turn fasteners.


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patent: 4762437 (1988-08-01), Mitomi
patent: 4810147 (1989-03-01), Hirohata
patent: 4938645 (1990-07-01), Wollar
patent: 4981405 (1991-01-01), Kato
patent: 5011356 (1991-04-01), Fernandez
patent: 5620291 (1997-04-01), Hayes
patent: 5897278 (1999-04-01), Frattarola

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