Elongated-member-driving apparatus – With interlock means
Reexamination Certificate
2001-01-08
2001-07-24
Smith, Scott A. (Department: 3721)
Elongated-member-driving apparatus
With interlock means
C227S120000
Reexamination Certificate
active
06264085
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a safety device for preventing from shooting of a pneumatic stapler when the magazine is removed from the barrel.
BACKGROUND OF THE INVENTION
A conventional pneumatic stapler employs powerful pneumatic machine to eject a staple to penetrate an object. In order to ensure a safety operation when using the pneumatic stapler, a safety plate is equipped in each of the conventional pneumatic staplers so that then trigger can only be pulled when the safety plate is unlocked. However, there is a dangerous situation that the pneumatic stapler could be unintentionally triggered to hurt people, that is when the magazine is removed from the barrel of the pneumatic stapler. This happens when the staples are jammed in the barrel and the user wants to withdraw the shooting problem so that he/she removes the magazine from the barrel and checks or removes the jammed staples. During the checking or removal of the jammed staples, the trigger could be pulled unintentionally and a staple ejects out from the barrel and hurts people.
The present invention intends to provide a safety device that is rotated when the magazine is removed and stops the safety plate from moving so as to avoid the trigger from being pulled.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a safety device for a pneumatic stapler and comprising a barrel having a slot and threaded hole respectively defined therein. A safety member has a connection hole and a first protrusion and a second protrusion respectively extend from the safety member. A boss extends from a surface of the safety member and is movably retained in the slot. A torsion spring is connected between the barrel and the safety member. A bolt extends through the connection hole of the safety member and the torsion spring and is engaged with the threaded hole in the barrel. The first protrusion is pushed upward by a magazine.
The primary object of the present invention is to provide a safety device that stops the safety plate from being unlocked when the magazine is removed.
These and further objects, features and advantages of the present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, several embodiments in accordance with the present invention.
REFERENCES:
patent: 5322189 (1994-06-01), Oda
patent: 5579975 (1996-12-01), Moorman
patent: 6012622 (2000-01-01), Weinger et al.
patent: 6145724 (2000-11-01), Shkolnikov et al.
patent: 6199739 (2001-03-01), Mukoyama et al.
patent: 6209770 (2001-04-01), Perra
Chen Jack
Chiang Hsuan-Chin
Ho Roman
Basso Industry Corp.
Baxley Charles E.
Smith Scott A.
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