Chuck device for tools

Details Chuck device for tools Chuck device for tools

2000-10-02

2001-12-04

Bishop, Steven C. (Department: 3722)

Chucks or sockets

Socket type

Self-grasping

C279S030000, C279S075000, C279S155000, C279S905000

Reexamination Certificate

active

06325393

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a chuck device for tools, and more particularly to a chuck device that allows a tool of the type having a bit on an end thereof and a drill on the other end thereof to be mounted to and removed from the chuck device by a single hand.
2. Description of the Related Art
FIGS. 12 and 13
of the drawings illustrates a conventional chuck device for tool bits of a pneumatic device that includes an outer cover
90
biased by a spring
93
. When a tool bit
94
is inserted into the chuck device, the user has to use one hand to move the outer cover
90
downward (as viewed from
FIG. 12
) to move a ball
92
to a position engaging with an annular recess
95
in the tool bit
94
. Then, the outer cover
90
is released and the spring
93
is returned to retain the ball
92
in place. Nevertheless, when the tool bit
94
and/or the chuck device is subjected to a shock, the ball
92
is apt to be moved into an annular groove
91
of the outer cover
90
under the action of the spring
93
. The tool bit
94
is thus disengaged. The present invention is intended to provide a chuck device that mitigates and/or obviates the above problems.
SUMMARY OF THE INVENTION
It is a primary object of the present invention to provide an improved chuck device that allows a tool of the type having a bit on an end thereof and a drill on the other end thereof to be mounted to and removed from the chuck device by a single hand.
In accordance with the present invention, the tool is ejected automatically when removing the tool from the chuck device. In addition, the tool is of the type having a bit on an end thereof and a drill on the other end thereof to provide an additional function selection for the user.
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.


REFERENCES:
patent: 1119276 (1914-12-01), Griffith et al.
patent: 1516257 (1924-11-01), White
patent: 2135861 (1938-11-01), Thompson
patent: 3788658 (1974-01-01), Benjamin et al.
patent: 4577875 (1986-03-01), Miyakawa
patent: 4692073 (1987-09-01), Martindell
patent: 4850758 (1989-07-01), Morgan
patent: 4900202 (1990-02-01), Wienhold
patent: 5013194 (1991-05-01), Wienhold
patent: 5062749 (1991-11-01), Sheets
patent: 5398946 (1995-03-01), Quiring
patent: 5452906 (1995-09-01), Huff et al.
patent: 5476273 (1995-12-01), Shadeck et al.
patent: 6199872 (2001-03-01), Hasan
patent: 3324756 A1 (1985-01-01), None

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