Trigger structure for spray gun

Details Trigger structure for spray gun Trigger structure for spray gun

2002-11-22

2003-11-18

Mar, Michael (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Flow line or nozzle attached or carried handgrip or handle

Pistol grip type

C239S525000

Reexamination Certificate

active

06648246

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a trigger structure for a spray gun, and more particularly to a trigger structure for a spray gun having an additional lower driving shaft that forms a supporting point of the trigger structure on the spray gun and defines a suitable travel for the trigger structure, so that a user's finger operating the trigger structure would not contact with a front projection of the front handle when the trigger structure is moved to a rear dead point of its travel.
There are various types of spray guns available for use. These spray guns have a simple structure as shown in
FIGS. 1
to
3
, and include a trigger
1
having one rearward extended driving shaft
2
movably received in a channel
3
above a front handle
4
of the spray gun. The trigger
1
is provided at upper and lower front ends with two projections
11
,
12
for engaging with upper and lower passages
41
,
42
, respectively, provided on the front handle
4
when the trigger
1
is assembled to the spray gun. The lower passage
42
is provided on a top of a front projection
43
forward extended from a front side of the front handle
4
to correspond to the upper passage
41
. When a user pulls the trigger
1
toward the front handle
4
with a finger pressing against a front end of the trigger
1
, the finger would contact with the front projection
43
on the handle
4
when the trigger
1
is fully pulled. Frequent contact of the finger with the front projection
43
during operating the spray gun would cause discomfort to the finger. It is therefore desirable to improve the trigger
1
to eliminate the above-mentioned problem in using the conventional spray guns.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide an improved trigger structure for spray gun for a user to handle the spray gun comfortably.
To achieve the above and other objects, the trigger structure for spray gun according to the present invention includes horizontally and rearward extended upper and lower driving shaft adapted to movably engage with upper and lower channels, respectively, formed on a front handle of the spray gun when the trigger structure is assembled to the spray gun. The lower driving shaft forms a supporting point of the trigger structure on the spray gun and defines a suitable travel for the trigger structure, so that a user's finger operating the trigger structure would not contact with a front projection on the front handle when the trigger structure is moved to a rear dead point of its travel.


REFERENCES:
patent: 2717806 (1955-09-01), Dale
patent: 2737415 (1956-03-01), Wheeler-Nicholson
patent: 3022015 (1962-02-01), Burch
patent: 5967422 (1999-10-01), Wang
patent: 6260774 (2001-07-01), Erickson

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