Fluid sprinkling – spraying – and diffusing – Flow line or nozzle attached or carried handgrip or handle – Pistol grip type
Reexamination Certificate
2001-05-10
2003-10-14
Hwu, Davis (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Flow line or nozzle attached or carried handgrip or handle
Pistol grip type
C239S302000, C239S320000, C239S321000
Reexamination Certificate
active
06631855
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to spray guns and more particularly to a locking device for spray gun which device facilitates a rapid positioning and readily disassembling of a cylinder inside the spray gun.
Typical spray gun
1
(as shown in
FIG. 1
) comprises a container
2
, a lid
3
, a cylinder
4
and a electromagnet
5
inside the housing to actuate an oscillating armature
6
to force a piston
8
moving forward so as to aspirate the paint inside the container
2
into the cylinder
4
spraying out to the atmosphere through a nozzle
11
. An adjustable anvil
7
on the right side of the oscillating armature
6
to adjust the oscillating extent of the armature
6
. The electromagnet
5
is controlled by a press button
10
. Because of the lid
3
is integrated with the cylinder
4
, the lid
3
must be secured to the bottom
12
of the housing by screws
9
prior to the assembly of the cylinder
4
into the housing. It is known that after finish of a job, a certain amount of paint may congeal in the cylinder
4
. To clean the congealed paint, the cylinder
4
must be disassembled by unfastening a plurality of screws
9
. This is wearisome job and waste time.
U.S. Pat. Nos. 3,680,789 and 3,899,134 all adopt fastening means that difficult to assemble or disassemble. And U.S. Pat. Nos. 2,999,646 and 3,445,068 also have the disadvantage of integration of the lid with the housing. It causes more difficult to remove the cylinder out of the spray gun to clean up.
Recently, some of the producers adapt threaded cylinder. But it is still inconvenient.
SUMMARY OF THE PRESENT INVENTION
The present invention has a main object to provide a structurally improved spray gun in which a locking device is provided to facilitate a rapid assembling and/or disassembling the cylinder into the housing of the spray gun and the assembly is rather stable.
Accordingly, the structurally improved spray gun of the present invention comprises a hollow housing with a handle, an electromagnet in the housing operated by a pressbutton switch, an oscillating armature pivoted to a rear side of the electromagnet which actuates the armature to make oscillatory action, an adjustable anvil to control the oscillatory span of the armature, a cylinder disposed in side the housing in which is an elastic no-return cork in front end and an elastic piston in rear end, a nozzle at front end of the cylinder and a lid integrated with the bottom of the cylinder to engage with a container containing the paint. When the armature impinges the piston to move forward, the paint is aspirated from the container into the cylinder and sprayed out to the atmosphere through the nozzle. This disclosure is characterized in that a locking device is provided in the housing make incorporation with the check blocks on the outer periphery of the cylinder so as to facilitate a rapid assembly and/or disassembly of the cylinder into the housing and the assembly is rather stable.
The present invention will become more fully understood by reference to the following detailed description thereof when read in conjunction with the attached drawings.
REFERENCES:
patent: 3899134 (1975-08-01), Wagner
patent: 5282722 (1994-02-01), Beatty
patent: 5320280 (1994-06-01), Murphy et al.
patent: 5941463 (1999-08-01), Herstek et al.
patent: 6031352 (2000-02-01), Carlson
LandOfFree
Structurally improved spray 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 Structurally improved spray gun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structurally improved spray gun will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3143401