Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...
Reexamination Certificate
1999-10-06
2001-10-02
Morgan, Eileen P. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Having work engaging and force exerting portion inserted...
C411S910000
Reexamination Certificate
active
06295900
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
Not Applicable
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable
BACKGROUND OF THE INVENTION
The present invention relates to improved fastener constructions of the type having a curvilinear key-receiving groove therein.
By way of background, fasteners having curvilinear key-receiving grooves therein are well known. In the past, these grooves have been derived from a circular configuration. This limited the number of configurations which could be made, even though such different configurations were extremely numerous. In addition, in the past fasteners with grooved types of key-receiving configurations, insofar as known, contained only a single groove, which in certain circumstances limited the usefulness of the fasteners. In addition, in the past fasteners having groove-type of key-receiving configurations were based on a circular configuration and had sharp edges. These sharp edges rendered them susceptible to having counterfeit keys made from the grooves because the sharp edges facilitated the driving of a cylindrical member into the grooves. It is with addressing the foregoing aspects of the prior art that the present invention is concerned.
BRIEF SUMMARY OF THE INVENTION
The present invention relates to an improved fastener having a key-receiving groove configuration which is based on a noncircular configuration and wherein the noncircular configuration can be oriented along different sized and differently oriented axes so as to practically infinitely increase the number of key-receiving configurations which may be made.
Another object of the present invention is to provide an improved key-receiving configuration wherein dual grooves are formed in the fastener so that two different keys can be used to actuate the fastener, or both keys may simultaneously be needed to actuate the fastener.
A further object of the present invention is to provide an improved groove type of fastener wherein the groove has chamfered edges, which thereby greatly limits the ability of keys to be counterfeited therefrom. Other objects and attendant advantages of the present invention will readily be perceived hereafter.
The present invention relates to a noncircular-based undulating key-receiving configuration comprising opposed undulating side walls, a centerline within said side walls, and said centerline lying within inner and outer noncircular perimeters.
The present invention also relates to a key-receiving configuration comprising an undulating groove, and chamfered edges in said groove.
The present invention also relates to a key-receiving configuration comprising a first key-receiving undulating configuration, and a second key-receiving undulating configuration within said first undulating key-receiving configuration.
The present invention also relates to a key comprising a first body, a first undulating key configuration on said body, a second body, a second undulating key configuration on said second body, said first body being mountable on said second body for effecting simultaneous engagement between said first undulating key configuration with a first undulating key-receiving configuration and between said second undulating key configuration with a second undulating key-receiving configuration.
The various aspects of the present invention will be more readily understood when the following portions of the specification are read in conjunction with the accompanying drawings wherein:
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patent: 5469726 (1995-11-01), Rushing et al.
patent: 5598753 (1997-02-01), Lee
Julicher Bradley J.
Lanham Thomas R.
Danganan Joni B.
Gastel Joseph P.
McGard, Inc.
Morgan Eileen P.
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