Electric gas lighter with dual ignition safety device

Details Electric gas lighter with dual ignition safety device Electric gas lighter with dual ignition safety device

2000-10-13

2001-06-05

Yeung, James C. (Department: 3743)

Combustion

Electrical or mechanical igniter correlated with burner feed

Having electric current producer

C431S256000, C431S344000, C126S401000, C126S405000

Reexamination Certificate

active

06241511

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a gas lighter and more particularly to an electric gas lighter with dual ignition safety device for preventing inadvertent ignition.
BACKGROUND OF THE INVENTION
The present inventor filed an application about electric gas lighter with Ser. No. 09/193,418 on Nov. 18, 1998, U.S. Pat. No. 5,975,888, which is shown in
FIGS. 1 and 2
. The gas lighter comprises a gas fuel reservoir
2
, a high-voltage circuit device
3
, and a housing
1
enclosed gas fuel reservoir
2
and high-voltage circuit device
3
. Gas fuel reservoir
2
comprises a gas outlet
20
, a hose
22
coupled to gas outlet
20
, an ignition tube
24
in the front coupled to hose
22
, and a pivot plate
26
on top of gas outlet
20
. A conductive tube
16
and a sleeve
14
are put on ignition tube
24
sequentially. High-voltage circuit device
3
is powered by a source (e.g., cell)
4
for providing current to ignition tube
24
. An ignition button
10
is partially raised above housing
1
. An electrical path from source
4
to high-voltage circuit device
3
is formed by depressing ignition button
10
. Ignition button
10
is always in contact with pivot plate
26
. A movable safety button
12
having one end coupled to a spring is provided adjacent ignition button
10
. In a locked position, ignition button
10
is secured by the laterally projected member from the bottom of safety button
12
by virtue of spring, thus preventing inadvertent ignition of ignition button
10
.
In use, first push safety button
12
rearward to disengage safety button
12
from ignition button
10
. Then depress ignition button
10
to enable the electrical path from source
4
to high-voltage circuit device
3
to generate a high-voltage current which is flowed to ignition tube
24
for generating an electric arc. At the same time, the blockage of gas outlet
20
by pivot plate
26
is lifted such that gas is immediately flowed to ignition tube
24
through hose
22
. Thus a spark is generated at the mouth of ignition tube
24
, resulting in the ignition of gas lighter.
However, the previous design suffered from a disadvantage. In detail, safety button
12
may be inadvertently pushed rearward to disengage from ignition button
10
by children. To the worse, ignition button
10
is also depressed thereafter. Accordingly, as stated above, the electrical path from source
4
to high-voltage circuit device
3
is formed to generate a spark at the mouth of ignition tube
24
. Thus, it is desirable to provide an improved electric gas lighter with novel safety mechanism in order to overcome the above drawbacks of prior art.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an electric gas lighter with dual ignition safety device comprising a first safety button and an ignition button, whereby the gas lighter is ignited only when the first safety button and the ignition button both are activated.
It is another object of the present invention to provide an improved electric gas lighter with enhanced safety mechanism by providing a second safety button in addition to the first safety button and the ignition button such that the gas lighter is activated only when the safety buttons and the ignition button all are activated.


REFERENCES:
patent: 4292021 (1981-09-01), Miyagawa
patent: 4516933 (1985-05-01), Buzzi
patent: 5496169 (1996-03-01), Chen
patent: 5865614 (1999-02-01), Hsu
patent: 5975888 (1999-11-01), Hsu

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