Combustion – Correlation of fuel or power supply with component movements...
Reexamination Certificate
2000-05-26
2001-06-12
Yeung, James C. (Department: 3743)
Combustion
Correlation of fuel or power supply with component movements...
C431S255000
Reexamination Certificate
active
06244858
ABSTRACT:
BACKGROUND OF THE PRESENT INVENTION
1. Field of Invention
The present invention relates to a lighter, and more particularly to a multi-purpose lighter with child resistant device for preventing under age children from the usage of the multi-purpose lighter.
2. Description of Related Arts
Most accidental fire cases today, many were started by the ignorant usage of the lighter, especially a barbecue lighter used at home such as pilot light for stoves or outdoor activities such as fireplaces or camping. Those accidental fires are causes by ignorance of human mistakes, especially among young children. So, nowadays, both U.S. government and U.S. Consumer Product Safety Commission demand a safety device in every lighter including the barbecue lighter to prevent unwanted ignition accidentally or by a child.
Conventional lighter comprises a safety switch for locking up the ignition trigger so as to prevent the ignition trigger of the lighter from accidentally being depressed thereby causing an unintended ejection. One of the common safety switch type barbecue lighter is that the safety switch is perpendicularly mounted on the casing of the barbecue lighter with respect to the trigger wherein a resilient element mounted under the safety switch for rebounding the safety switch to its original position, so as to re-lock the barbecue lighter after every ignition.
In order to ignite the barbecue lighter, a user's thumb must press the safety switch downward while the user's finger must depress the trigger. After a short period of time, the resilient element will tend to loss its elastic properties since the size of the resilient element is short. In order to strengthen the resilient element, a longer resilient element can be used. However, the size of the resilient element is limited by the casing of the barbecue lighter. So, user may repeat the step of unlocks the safety switch many times until he or her ignites a fire in certain condition. Therefore, such incorporating mechanism may lead to different results depending on the user.
SUMMARY OF THE PRESENT INVENTION
A main object of the present invention is to provide a multi-purpose lighter with child resistant device for preventing under age children from the usage of the multi-purpose lighter.
Another object of the present invention is to provide a multi-purpose lighter with child resistant device normally locks up the downward ignition motion of the trigger button, so as to prevent any unwanted ignition of the lighter.
Another object of the present invention is to provide a multi-purpose lighter with child resistant device, wherein in order to depress the trigger button downwardly so as to ignite the lighter, the user must press down a lock button and remain the lock button in unlocking position. Therefore, children under five years old are unable to complete the ignition operation.
Another object of the present invention is to provide a multi-purpose lighter with child resistant device which not only normally retains in a locking condition, but also can automatically return to the locking condition after each ignition operation so as to prevent any unintentional ignition of the lighter.
Accordingly, in order to accomplish the above objects, the present invention provides a multi-purpose lighter, comprising:
a casing comprising a liquefied gas cavity and a piezoelectric unit casing which attached to the liquefied gas cavity and defines a trigger cavity therein,
a gas emitting nozzle extended from and communicated with the liquefied gas cavity in the casing,
an elongated nozzle tube mounting on a ceiling of the casing for encircling the gas emitting nozzle,
a piezoelectric unit, which is disposed in the piezoelectric unit casing of the casing, comprising a movable operating part extended upwardly and an igniting tip extended adjacent to the gas emitting nozzle,
a trigger button, which is disposed in the trigger cavity of the casing in a horizontally movable manner, being attached on the movable operating part of the piezoelectric unit in such a manner when the trigger button is pushed downward, the movable operating part of the piezoelectric unit is compressed for generating piezoelectricity and, at the same time, the gas emitting nozzle is actuated by a gas level to release gas within the liquefied gas cavity, and
a child resistant device, comprising:
a lock member slidably disposed in the casing in a vertically movable manner comprising a lock button slidably mounted on a top wall of the casing and a locker arm downwardly extended into the trigger cavity in such a manner the locker arm is arranged to be driven by the lock button to move from a normally locking position to an unlocked position,
a blocking wall formed on a top portion of the trigger button wherein the blocking wall is facing the locker arm,
a resilient element which is disposed in the trigger cavity for applying an urging pressure against the locker arm so as to normally retain the lock button at the locking position,
wherein at the locking position, the lock member is downwardly extended to the blocking wall for blocking up the trigger button from being pushed downwardly so as to lock up the trigger button from ignition, and that at the unlocked position, the lock member is moved to offset from the blocking wall such that the trigger button is capable of being pushed inwardly to ignite the multi-purpose lighter.
In order to ignite the multi-purpose lighter, the user must intentionally press the lock button down and remain it in an unlocked condition that the locker arm is offset from the blocking wall. Then, the user can push the trigger button to ignite the multi-purpose lighter. When the pushing force applied on the lock button is released, the resilient element will automatically rebound to its original form so as to force the locker arm to return to its original locking position.
REFERENCES:
patent: 5697775 (1997-12-01), Saito et al.
patent: 5980242 (1999-11-01), Man
patent: WO 99/47855 (1999-09-01), None
patent: WO 99/60309 (1999-11-01), None
Chan Raymond Y.
David & Raymond Patent Group
Yeung James C.
LandOfFree
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