Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...
Patent
1984-01-26
1986-04-15
Schmidt, Frederick R.
Tools
Wrench, screwdriver, or driver therefor
Having work engaging and force exerting portion inserted...
81452, 81453, 81454, 81457, B25B 2308
Patent
active
045819629
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The field of the invention is a common and widespread type of tool, namely a screwdriver or similar tool or implement adapted to starting and driving, or in reverse order to locating and removing screws, machine bolts or screws and analagous or similar threaded fasteners in their various sizes and forms. In one of its forms it is a device for holding screws in registration with the tool bit and starting them in holes (but not driving them home); another is designed for manufacture as an integral part of a complete tool which would be capable of both operations; yet another is designed to be adapted to existing tools (both fixed-bit and with insertable bits) and one special adaptation applies to jewelers' screwdrivers, and includes an ancillary tool which facilitates replacement of very small machine screws in eyeglass frames by feel alone, as one might be required to do if a second pair of glasses is not handy.
The adapting device may be fitted to or integrally made as part of tools for all types of screws or machine bolts, including not only the common slotted (fillister) or Phillips head screws, but also special designs such as the Pozidriv, clutch, Torx, Scrulox, Allen head (hex) and Reed Prince. Depending on head design, it could also be adaptable to types of sheet metal fasteners which have only partial threads, e.g. Dzus fasteners.
In a field of art as fundamental as this one, there is broad base of existing art. The basic elements of this invention, taken separately, may resemble existing devices, however their combination as described herein produces a cooperating family of tools which efficiently performs tasks which cannot all be accomplished, nor perhaps any of them as well, with any of the available devices known to applicant, who believes himself to be one skilled in this particular art, and knowledgeable concerning such tools.
BACKGROUND ART
One of the most annoying and difficult problems in the use of screws and fasteners is that of inserting and driving them, or in reverse order locating and removing them, in recesses or places where it is difficult to see the head or socket, and where in addition it may be difficult or not possible to use two hands or an auxilliary tool. In these situations, it is necessary, to start and drive the screw, to have a tool which will hold the screw itself, yet release it when necessary. In the case of locating and removing a screw in such a location, it is further necessary to have a tool which will enable the user to locate the screw and center the bit of the tool to register with the head, then also capture it dependably and withdraw it as it is unscrewed.
Many devices have been offered in an approach to solving this problem, or these associated problems, as summarized below. Most of them require two handed operation of the tool to lock or affix it to a screw head, are difficult to apply or perhaps jam themselves under the head after driving the screw home, will not fit in narrow recesses or depressions, or do not perform all the operations required. The proposed invention is designed, simply, to do more of these things better.
A widely distributed magazine in the United States, Popular Science (Times Mirror Magazines, 380 Madison Avenue, New York City) featured in its May 1982 issue a survey and summary article on the field of screwdrivers. This article begins on page 132, and summarizes various special type screws and tools associated therewith. On page 134 there is mention of various types of screw holders or starters considered as commercially available, with specific mention of the most common forms with spring fingers or leaves which must be engaged with the head, or those with a wedge or center leaf which turns and jams in a screw slot to hold the screw on the tool bit.
A number of patents have issued on various devices intended to address these associated problems, and reference will be made to the following United States Patents known to applicant herein to have issued. They are listed with names of patentees, and with assigned l
REFERENCES:
patent: 796154 (1905-08-01), Schulze
patent: 2796100 (1957-06-01), Dierker
patent: 2954809 (1960-10-01), Loewy
patent: 4190091 (1980-02-01), Colognori
patent: 4455898 (1984-06-01), Marbourg
Gregory Marshall C.
Schmidt Frederick R.
Zatarga J. T.
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