Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Reexamination Certificate
2002-05-07
2004-03-09
Meislin, D. S. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
C081S180100, C081S900000, C403SDIG001
Reexamination Certificate
active
06701809
ABSTRACT:
TECHNICAL FIELD
This invention relates generally to a magnetic socket wrench connector device, in particular, to provide an improved magnetic socket wrench connector device capable of adjusting its length to fit all kinds of socket wrenches.
BACKGROUND OF THE INVENTION
Socket wrenches, also referred to as ratchet wrenches, have a rectangular drive to rotate a socket, which engages a nut or bolt head causing it to rotate. A plurality of sockets is used, each socket having a different size opening to fit a different size nut or bolt. The drive for all the sockets is the same. Generally the sockets are stored separate from the wrench.
To tighten a bolt, a user has to use one hand to hold the wrench engaged with a socket and use another hand to insert the bolt into the socket then start tightens it to the desired position. Using a socket wrench to loose a bolt, a user use one hand to handle the wrench and when the bolt is loosened, the user has to use another hand to take it out or to catch it before it fall to the ground. During the process of tighten or loose a bolt, a user usually will hold something that is fixed to ground or wall to support his body with one hand and use the other hand to do the work of tightening or loosening the bolt. It's not convenient for a user to do so many things when he is tightening or loosening a bolt. Especially for those who only have one arm, it's difficult to handle the socket wrench and at the same time pay attention not to let the bolt fall out.
One related art to overcome this problem is a magnetic socket wrench connector device shown in FIG.
5
. The device
60
contains the concave portion
61
at one end to engage with the spur
61
of the socket wrench
70
and at the other end. There is a protruding portion
62
to engage with the socket
80
. The protruding portion can extend through the end of the socket
80
and into the concave portion
81
. The magnet
63
is attached to the front face of the protruding portion
62
. When the bolt
90
is set in to the concave portion, the magnet
63
can attract the head
91
the bolt
90
. When the bolt is loosened, the head
91
of the bolt will still be attracted by the magnet
63
, so the bolt
90
will not fall out. Therefore, A user can use the wrench
70
with only one hand.
However, The wrench
70
has the following disadvantages: 1. The manufacture of the device
60
is complicated and the cost is high. In order to fit with different sockets with different specifications, the device
60
has to comply with different socket wrenches and sockets and each device
60
has a magnet
63
attached to it, so it's complicated. 2. The size of the device
60
is big and inconvenient to operate it. The length of the protruding portion
62
is fixed, so when the device
60
is used with smaller sockets, the protruding portion
62
that extend into the concave portion
81
will be longer than the use needs and therefore, a head of the bolt
90
may not be fully inserted into the concave portion
81
. On the other side, when the device
60
is used with a larger socket
80
, the protruding portion
62
that extend into the concave portion
81
will be too short and the magnet
63
cannot fully contact the bolt
90
. The magnet then cannot catch the bolt
90
securely.
What we need is a kind device that not only can attract bolts but also the length is adjustable to fit different kinds of socket wrenches and sockets and at the same time it's easy to manufacture and the cost is low.
SUMMARY OF INVENTION
It is therefore a primary objective of the present invention to provide a socket wrench connector device, which can attract the bolts and its length is adjustable to fit different socket wrenches and sockets.
Another object of the present invention is to provide a socket wrench connector device to be easily manufactured and the cost is comparatively low.
The present invention, briefly summarized, in one embodiment discloses a elastic magnetic socket wrench connector device, which contains: first tube with first magnet fixed at first end and an inward stop around second end; second tube sliding through the second end with one end inside the first tube, the inside end has a flange and with second magnet fixed at outside end; The inward stop preventing the flange from sliding off the first tube and the first magnet and the second magnet are of the same magnetic poles. The first magnet has stronger magnetic force than that of said second magnet. The cross sections of the first tube and the second tube can be circular or rectangular. The first magnet and the second magnet are fixed inside the first tube and second tube or attached at one end of each tube.
REFERENCES:
patent: 2624223 (1953-01-01), Clark
patent: 3207010 (1965-09-01), Wending
patent: 5146814 (1992-09-01), Vasichek
patent: 5163345 (1992-11-01), Doan et al.
patent: 2003/0041698 (2003-03-01), Chi
Meislin D. S.
Rosenberg , Klein & Lee
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