Metal fusion bonding – Metallic heat applicator – Adjustable or detachable head or tip
Reexamination Certificate
2003-07-03
2004-10-19
Bos, Steven (Department: 1754)
Metal fusion bonding
Metallic heat applicator
Adjustable or detachable head or tip
C126S413000
Reexamination Certificate
active
06805275
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to fastening devices and more particularly to a device for fastening the barrel of a gas operated soldering gun with improved characteristics.
BACKGROUND OF THE INVENTION
Gas operated soldering guns have been widely used in recent years. It has the advantages of quick heating or stopping, high safety, and convenience. The body of a conventional gas operated soldering gun
3
having substantially the same construction as the invention is shown in phantom lines in FIG.
5
. The gun
3
comprises a forward barrel
2
and a rearward combustion chamber
32
with flammable gas contained therein. A nozzle
22
is threadably secured to a forward end
21
of the barrel
2
. A tip
23
is threadably secured to a forward end of the nozzle
22
. A spout
31
, extended forwardly from the combustion chamber
32
, is connectable to the barrel
2
by performing one of the following techniques.
As shown in
FIG. 1
, a first technique involves a coupling of the spout
31
and the barrel
2
by means of mated threaded sections
6
. As shown in
FIG. 2
, a second technique involves a coupling of the spout
31
and the barrel
2
by means of two or more projections
4
urged against the outer surface of the spout
31
in which the projections
4
are formed by punching on the outer surface of the barrel
2
. As shown in
FIG. 3
, a third technique involves a coupling of the spout
31
and the barrel
2
by forming a threaded hole
5
through the barrel
2
so that a screw
51
can be driven into the hole
5
to fasten the outer barrel
2
to the inner spout
31
. A fourth technique involves a coupling of the spout
31
and the barrel
2
by shaping the interior of the barrel
2
differently from the outer surface of the spout
31
so that a rotation of the barrel
2
about the spout
31
or vice versa can fasten them together by snapping.
However, the prior art suffered from several disadvantages with respect to safety and convenience in practice. For example, the coupling by means of the threaded sections
6
as illustrated in
FIG. 1
is time consuming in assembly or disassembly of the spout
31
and the barrel
2
. As to the projections
4
illustrated in
FIG. 2
, despite of the benefit of quick assembly it still has the drawbacks of uncontrolled allowances of the projections
4
, resulting in a failure of conforming to the spout
31
, and disengagement of the spout
31
from the barrel
2
due to long time wear of hard contact between the projections
4
and the spout
31
. Such drawback of disengagement of the spout
31
from the barrel
2
is also occurred in the fourth technique. As to the threaded coupling illustrated in
FIG. 3
, despite of the benefit of reliable fastening it also has drawbacks of requiring a tool (e.g., screw driver) to fasten the screw
51
in assembly or unfasten the screw
51
in disassembly. This is quite time consuming and tedious. Moreover, in removing the heated barrel
2
during operation the user has to use one hand to hold the gun
3
and the other hand to remove the barrel
2
. This is quite inconvenient and it is possible of hurting the hand by the hot barrel if enough care is not taken. This is not a safe technique. Thus, the need for improvement still exists.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a device for fastening a barrel of a gas operated soldering gun to a spout thereof. The fastening device has advantages of quick assembly or disassembly of the barrel and the spout, increased soldering efficiency, and high safety.
To achieve the above and other objects, the present invention provides a device for fastening a barrel of a gas operated soldering gun to a spout of a combustion chamber thereof. The fastening device comprises a cavity in a rear end of the barrel, a resilient clip disposed in the cavity, and a plurality of latched pieces on the clip, the latched pieces being disposed inside the clip. The spout can be fastened in the barrel by clinging the barrel to the spout as the latched pieces exert a strong, resilient force onto the spout.
The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings.
REFERENCES:
patent: 1596061 (1926-08-01), Meyer
patent: 1630622 (1927-05-01), Lea
patent: 4119088 (1978-10-01), Sim
patent: 4691691 (1987-09-01), Patenaude
patent: 4858593 (1989-08-01), Hsu
patent: 5083916 (1992-01-01), Glennon et al.
patent: 5803061 (1998-09-01), Kao
patent: 6244853 (2001-06-01), Oglesby et al.
patent: 6247631 (2001-06-01), Kawakatsu et al.
Bos Steven
Cooke Colleen P.
Rekrow Industrial Inc.
LandOfFree
Device for fastening barrel of gas operated soldering gun does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for fastening barrel of gas operated soldering gun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for fastening barrel of gas operated soldering gun will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3332299