Chucks or sockets – Socket type – Obliquely guided reciprocating jaws
Reexamination Certificate
1999-11-03
2001-06-19
Bishop, Steven C. (Department: 3722)
Chucks or sockets
Socket type
Obliquely guided reciprocating jaws
C279S140000, C279S902000
Reexamination Certificate
active
06247706
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a drill chuck for use with electric or pneumatic drivers and specifically relates to a chuck possessing a sleeve member which can be operated manually or is self-locking and increases the gripping force.
2. Description of the Prior Art
A drill chuck of the prior art, as shown is
FIG. 1
, is chiefly comprised of body for receipt of a spindle, said body whose exterior having an adjustable cover shell and locking cover shell and said body having a plurality of jaw members disposed within the body member, where rotation of the adjustable cover shell controls the extension and retraction of the jaw members which grip or release the drill bit.
The user of a drill chuck of the prior art must rotate the adjustable cover shell with one hand while holding the drill bit inside the jaw members until the drill bit is locked in place. Not only is this awkward to handle, the limited surface available on adjustable cover shell often makes it difficult to determine whether or not enough gripping force has been applied between the drill bit and jaw members. If the gripping force around the drill bit is insufficient, the machine must be shut down and adjustable cover shell rotated by hand to tighten the drill bit. Besides being inconvenient, the adjustable cover shell and locking cover shell may still be in motion poising a risk of injury to the user.
SUMMARY OF THE INVENTION
In accordance with the present invention, there is provided an improved chuck possessing the following added value and effects:
It is the principal object of the present invention to achieve normal jaw clamping effect and self-locking function by manually gripping the top cover shell to actuate the thrust bearing ring and threaded socket by means of the shallow and deep recesses provided on the wear-resistant ring.
Another object of the present invention is to provide added safety by preventing the shell cover from rotating along with the spindle by mating the joint member with the driving device.
An additional object of the present invention is to loosen nuts through the forward and reverse action of the driving device by means of tight engagement of the body member and sleeve
It is still a further object of the present invention to provide a means to manually tighten or loosen the gripping force on a drill through the use of a rod-shaped tool that is inserted into holes provided in the threaded socket in conjunction a wrench and sleeve where the force is applied to the rod-shaped tool and wrench in opposing directions
Other objects, features and aspects of the present invention are discussed in greater detail below.
REFERENCES:
patent: 4951955 (1990-08-01), Sakamaki
patent: 5988653 (1999-11-01), Kuo
patent: 5992859 (1999-11-01), Lin
Bacon & Thomas PLLC
Bishop Steven C.
Chum Power Machinery Corp.
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