Joints and connections – Articulated members – Lockable at fixed position
Reexamination Certificate
2002-08-26
2004-04-27
Cottingham, John R. (Department: 3679)
Joints and connections
Articulated members
Lockable at fixed position
C403S109600, C403S322200, C016S110100
Reexamination Certificate
active
06726393
ABSTRACT:
BACKGROUND OF INVENTION
1. Field of Invention
The present invention relates to a telescopic connecting device for connecting a tool with tool bits of different lengths.
2. Related Prior Art
Taiwan Patent Publication No. 478443 discloses a connecting device for connecting a tool with a tool bit. The connecting device includes a rod
20
consisting of a shank
22
for engagement with the tool and a socket
21
for engagement with the tool bit. A slot
23
is defined through the socket
21
for receiving a latch
70
. Two rings
50
and
60
are respectively received in two grooves
24
and
25
defined in an external face of the socket
21
. A spring
40
is mounted on the socket
21
against the ring
50
. A collar
30
includes a first end, a second end and an internal face. A first shoulder is formed on the internal face of the collar
30
at the first end. A second shoulder is formed on the internal face of the collar
30
. A groove
31
is defined in the internal face of the collar
30
near the second end. When moved past the rings
50
and
60
, the first end of the collar
30
pushes them into the grooves
24
and
25
so that the collar
30
can be mounted onto the socket
21
. The spring
40
is compressed between the ring
50
and the second shoulder formed on the internal face of the collar
30
so as to bias the collar
30
from the socket
21
. However, the first shoulder formed on the internal face of the collar
30
is engaged with the ring
60
, thus retaining the collar
30
on the socket
2
. To insert a tool bit
80
defining at least one recess
81
into the socket
21
, the collar
30
is moved on the socket
21
toward the shank
22
so as to align the groove
31
with the latch
70
. The tool bit
80
can be inserted into the socket
21
. When moved past the latch
70
, an end of the tool bit
80
pushes the latch
70
into the deepest portion of the groove
31
. Thus, the tool bit
80
can be inserted further into the socket
21
. When the collar
30
released, the spring
40
moves the collar
30
on the socket
21
away from the shank
22
so as to disengage the groove
31
from the latch
70
. Thus, the collar
30
pushes the latch
70
into the at least one recess
81
so as to lock the tool bit
80
. However, the socket
21
includes a limited length from its free end to its slot
23
so that it cannot receive various tool bits
80
with various lengths from their ends to the recesses
81
.
The present invention is therefore intended to obviate or at least alleviate the problems encountered in prior art.
SUMMARY OF INVENTION
It is the primary objective of the present invention to provide a connecting device for connecting a tool with tool bits of different lengths.
According to the present invention, a connecting device for connecting a tool with tool bits of different lengths includes a shank, a socket and a position retainer. The shank includes a first end for engagement with the tool and a second end. The socket includes a first end for receiving the second end of the shank and a second end for receiving the tool bits. The position retainer is capable of selectively retaining the socket in one of various positions on the shank. Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the attached drawings.
REFERENCES:
patent: 3260541 (1966-07-01), Sadler et al.
patent: 4376397 (1983-03-01), Newby et al.
patent: 5934384 (1999-08-01), Wang
patent: 2003/0140744 (2003-07-01), Chen
patent: 2003/0145693 (2003-08-01), Huang
Chiang Hsin-Ming
Tsai Sheng-Chung
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