Safety gas burner

Details Safety gas burner Safety gas burner

2001-01-25

2002-08-27

Bennett, Henry (Department: 3743)

Combustion

Correlation of fuel or power supply with component movements...

C431S255000

Reexamination Certificate

active

06439879

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to gas burners and, more specifically, to a safety gas burner.
A regular gas burner
1
, as shown in
FIG. 1
, comprises a substantially rectangular shell
10
, a front extension tube
40
forwardly extended from one end of the shell
10
, a metal flame tube
41
mounted in the front extension tube
40
, a butane well
11
and an igniter
12
and an actuating device
13
respectively mounted inside the shell
10
, a gas valve
111
mounted in the top outlet of the butane well
11
, a flexible gas tube
112
extended from the gas valve
111
to the free end of the front extension tube
40
and connected to a spark discharging electrode
31
, which is connected to one terminal
122
of the igniter
12
by a conductor, a gas lever
113
coupled to the gas valve
111
, an ignition switch button
16
mounted in a through hole
21
of the shell
10
and stopped against the igniter
12
, a safety button
14
supported on a spring
141
in a locating hole
18
of the shell
10
, and a link
17
supported on a spring
171
at the actuating member
13
. When operating the gas burner, the safety button
14
is depressed to move the actuating member
13
and the link
17
to such position that the link
17
is aligned between a rod
161
of the ignition switch button
16
and the gas lever
113
, and then the ignition switch button
16
is depressed to force the rod
161
against the link
17
and to drive the igniter
12
, causing the link
17
to drive the gas lever
113
to open the gas valve
111
and the igniter
12
to discharge sparks through the spark discharging electrode
31
, and therefore fuel gas is discharged to the flame tube
41
and burned by the sparks discharged through the spark discharging electrode
31
. If the user does not depress the safety button
14
, depressing the ignition switch button
16
simply drives the igniter
12
to discharge sparks through the spark discharging electrode
31
without causing the gas lever
113
to open the gas valve
111
, therefore no fuel gas is provided to the flame tube
41
. However, this structure of gas burner is still not safe in use. Because the safety button
14
is exposed to the outside of the shell
10
, the child playing the gas burner can easily found the presence of the safety button
14
and operate it, and a flame may be produced accidentally.
SUMMARY OF THE INVENTION
The present invention has been accomplished to provide a safety lock for gas burner, which eliminates the aforesaid problem. It is main object of the present invention to provide a safety burner, which uses a spring-supported stop member to stop the safety button from operation. It is another object of the present invention to provide a safety burner, in which the contact area of the stop member to the safety button is concealed from sight, so that the child cannot easily find the way to unlock the safety button when playing the safety gas burner. According to the present invention, the safety button has a mushroom-like cap, the shell has a sliding slot disposed adjacent to the safety button and holding a spring-supported stop member. Normally, the stop member is stopped between the cap of the safety button and the outside wall of the shell to stop the safety button from operation. When in use, the stop member is moved downwards in the sliding slot and disengaged from the safety button, enabling the safety button to be operated.


REFERENCES:
patent: 5496169 (1996-03-01), Chen
patent: 5697775 (1997-12-01), Saito et al.
patent: 5931656 (1999-08-01), Kanno
patent: 6059563 (2000-05-01), Hsu
patent: 6244858 (2001-06-01), Wang
patent: 6293782 (2001-09-01), Tsai

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