Fixing device using compressed gas

Details Fixing device using compressed gas Fixing device using compressed gas

1999-02-04

2001-05-01

Vo, Peter (Department: 3721)

Elongated-member-driving apparatus

With means to move or guide member into driving position

Including supply magazine for constantly urged members

C060S632000, C123S465000, C227S010000

Reexamination Certificate

active

06223966

ABSTRACT:

TECHNICAL FIELD
The invention relates to a fixing device using compressed gas, comprising a casing containing a combustion chamber, a housing for receiving a cartridge of compressed gas, having a duct for injecting compressed gas into the combustion chamber, a plug guide projecting at the front of the casing, a magazine of plugs, a housing for receiving a battery and a firing handle on which is mounted a trigger for controlling explosion of the combustion gas contained in the combustion chamber by means of an ignition device.
BACKGROUND ART
The plug magazine and the firing handle extend substantially perpendicular to the axis of the casing and are offset with respect to each other along this axis, the magazine communicating with the plug guide, and the handle being connected to the casing. The battery housing generally extends substantially perpendicular to the axis of the casing, along the plug magazine.
In certain devices the cartridge housing extends parallel to the axis of the casing, between the casing and the handle, whereas in other devices the fuel cartridge is housed inside the firing handle.
These fixing devices are generally poorly balanced so that an operator, when holding the device by gripping the firing handle with one hand, experiences difficulties in handling the device and stabilising it in the firing position.
DISCLOSURE OF THE INVENTION
It is an object of the present invention for a device of the type defined above to be balanced by locating its center of gravity substantially at a point on the handle to which the operator applies his index finger.
Another object is to bring the center of gravity of the fixing device closer to this ideal balance point.
To this end the invention relates to fixing device using compressed gas comprising a casing containing a combustion chamber, a housing for receiving a compressed gas cartridge, means for injecting compressed gas into the combustion chamber from the cartridge, a magazine for supplying fixing elements, a housing for receiving means for supplying electricity and a handle directly connected to the casing and substantially perpendicular to an axis of the casing, characterised in that the cartridge housing extends substantially parallel to the handle and is offset with respect thereto along the axis of the casing.
This type of relative arrangement of the cartridge housing and the handle offers a better distribution of the weight of the various elements of the device.
The cartridge housing is preferably disposed between the handle and the magazine for supplying fixing elements.
In a preferred embodiment, a bridge for housing the means for supplying electricity is provided, connecting the cartridge housing and the handle.
The housing for receiving the means for supplying electricity no longer being connected to the magazine of fixing elements, the device is still supplied electrically when the magazine is removed.
The applicant has also managed to exploit the generally considerable weight of the means for supplying electricity in order to balance the device still further.


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