Dispensing – With discharge assistant – Insertable cartridge or removable container
Reexamination Certificate
2001-10-09
2002-07-02
Kaufman, Joseph A. (Department: 3754)
Dispensing
With discharge assistant
Insertable cartridge or removable container
C222S391000
Reexamination Certificate
active
06412667
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a glue dispenser, and more particularly to a glue dispensing gun.
2. Description of Related Art
As shown in
FIG. 1
, a glue dispensing gun of the prior art comprises a barrel
11
to accommodate a glue container
10
. The barrel
11
is provided at the rear end with a rear cap
12
which is fastened with a grip
14
having a trigger
13
. The top of the grip
14
is fastened with a horizontal center rod
15
whose one end is put through the rear cap
12
to locate in the inside of the barrel
11
. The center rod
15
is provided at the front end with an advancing piece
17
which is intended to urge a rear end cover
16
of the glue container
10
. The center rod
15
is further provided with a compression spring
18
, a pushing piece
19
, a recovery spring
20
, and a control piece
21
. When the center rod
15
is activated by the trigger
13
, the pushing piece
19
is actuated to cause the center rod
15
to displace forward so as to push the advancing piece
17
, which puts a pressure on the rear end cover
16
of the glue container
10
. The barrel
11
is provided at the front end with a front cap
22
and a glue discharging tube
23
for discharging the glue contained in the glue container
10
via the front cap
22
.
Such a prior art glue dispensing gun as described above is defective in design because the control piece
21
is urged by the recovery spring
20
to be positioned at an inclination at such time when the center rod
15
displaces forward, thereby preventing the center rod
15
from moving backward. As a result, when the center rod
15
has moved forward to arrive at the final point, the center rod
15
cannot be caused by the trigger
13
to move backward. For this reason, the bottom end of the control piece
21
is pressed by a finger to free the center rod
15
, which is then pulled backward with another hand. It is conceivably difficult to use the prior art glue dispensing gun. In addition, the recovery spring
20
and the control piece
21
are not shielded to provide them protection against rust or damage caused by impact.
In short, the prior art glue dispensing gun is inefficient at best.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a glue dispensing gun which is efficient and free of the drawbacks of the prior art glue dispensing gun.
The glue dispensing gun of the present invention is basically similar in construction to the prior art glue dispensing gun. The glue dispensing gun of the present invention is characterized by an eccentric transmission member which is disposed in a receiving slot of the rear end of the barrel of the glue dispensing gun and is formed of a guide block, a bearing, and a push block. The guide block is eccentrically pivoted in the receiving slot such that the guide block is fastened with a connection rod of the trigger. The push block is rested against the pushing piece of the center rod. As the trigger is activated, the guide block of the eccentric transmission member is actuated to turn eccentrically so as to cause the push block to push the pushing piece of the center rod, thereby resulting in the forward movement of the center rod. In the meantime, the center rod is retained or released by a retaining piece, depending on the eccentric displacement of the bearing of the eccentric transmission member. The forward motion and the backward motion of the center rod are controlled by the trigger.
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 5052243 (1991-10-01), Tepic
patent: 5192008 (1993-03-01), Hwan
patent: 5370282 (1994-12-01), Sedlmeier
patent: 5390831 (1995-02-01), Schneider
patent: 6182867 (2001-02-01), Keller
patent: 6286729 (2001-09-01), Lin
Harrison & Egbert
Kai Shyun Enterprise Co., Ltd.
Kaufman Joseph A.
LandOfFree
Glue dispensing 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 Glue dispensing gun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Glue dispensing gun will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2844309