Chucks or sockets – More than one set of gripping means
Reexamination Certificate
1999-08-17
2001-02-27
Bishop, Steven C. (Department: 3722)
Chucks or sockets
More than one set of gripping means
C279S060000, C279S062000, C279S022000, C279S145000, C279S904000, C279S128000, C408S226000, C081S438000
Reexamination Certificate
active
06193241
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tool drive system in a chuck assembly where the inner end of the chuck assembly has a cylindrical inner bore portion for being received and fixed on the outer end of a motor shaft of a power tool. The tool drive system includes an insert which is received in the cylindrical bore and held against axial and rotational movement therein. The insert has structure thereon for engaging the inner end of a stem of a tool holder or a of a tool for driving the tool holder or tool. The tool holder or tool is held magnetically or by a mechanical apparatus against axial movement axially of the bore of the chuck.
2. Description of the Prior Art
Heretofore various chuck assemblies have been proposed for driving a tool, such as a drill bit. Typically, such chuck assemblies have utilized radially and axially movable jaws for locking the tool to the chuck assembly.
Examples of previously proposed analogous and non-analogous chuck assemblies and tool holders for chucks are disclosed in the following analogous and non-analogous U.S. patents:
U.S. Pat. No.
Patentee
3,945,653
Falche
4,188,041
Soderberg
4,199,160
Bent
4,692,073
Martindell
4,900,202
Wienhold
5,013,194
Wienhold
5,193,824
Salpaka
5,417,527
Wienhold
5,458,445
Bäder et al.
5,464,229
Salpaka
5,465,983
Owens et al.
5,470,180
Jore
5,674,031
Bilz et al.
5,921,562
Robison
In prior application U.S. Ser. No. 09/317,231, there is proposed a snap-in-chuck assembly including a chuck and movable structure in the chuck for releasably engaging in an opening or annular groove in a shank of a tool or tool holder for preventing axial movement of the tool or tool holder and drive structure in the chuck for engaging mating structure on the shank when the shank of the tool or tool holder is inserted in the chuck.
As will be described in greater detail hereinafter, the tool drive system of the present invention can be a stand alone system or can be incorporated into a conventional chuck assembly presently available on the market having jaws which are radially movable inwardly and outwardly of a central chuck bore of the chuck for gripping a tool and which has an inner threaded bore portion adapted to receive a threaded end of a motor shaft of a power tool.
SUMMARY OF THE INVENTION
According to the present invention there is provided a tool drive system for use with a chuck having a throughbore including an outer bore portion for receiving a tool or tool holder and an inner bore portion constructed to receive and be mounted on an outer end of a motor shaft of a power tool. The system comprises: an insert received in the inner bore portion; structure for preventing rotation of the insert relative to the chuck; structure on the insert for engaging an inner end of a tool or tool holder; and a mechanism for holding the tool or tool holder against axial movement relative to the insert.
REFERENCES:
patent: 768396 (1904-08-01), North
patent: 1035495 (1912-08-01), Szeitl
patent: 2387339 (1945-10-01), Meyer
patent: 2522217 (1950-09-01), Fischer et al.
patent: 5193824 (1993-03-01), Salpaka
patent: 5540453 (1996-07-01), Sakamaki
patent: 5921562 (1999-07-01), Robison
patent: 3841638 (1990-06-01), None
Bishop Steven C.
Vigil Thomas R.
Vigil Thomas R.
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