Elongated-member-driving apparatus – With means to move or guide member into driving position – With means to assure correct orientation of member
Reexamination Certificate
1998-12-14
2001-10-30
Smith, Scott A. (Department: 3721)
Elongated-member-driving apparatus
With means to move or guide member into driving position
With means to assure correct orientation of member
C227S130000, C227S136000
Reexamination Certificate
active
06308880
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a compressed-air nail firing tool.
It is known to use compressed-air nail firing tools which are adapted to fire metal nails, for example for fixing wood items and the like. Said nail firing tools are substantially constituted by a body which lies above a handle which can be connected to a compressed air delivery hose; means for the actuation of a striking blade in a piston-like fashion are accommodated inside said body. The striking blade is adapted to engage a firing channel formed along a tube which protrudes from a head which is fixed in a front region to the nail firing tool body.
The nails to be fired are fed sequentially to the firing channel from a magazine which is rigidly coupled to the nail firing tool, below the tube, inside which a ribbon of nails, rolled into a reel, is loaded. The nails are mutually parallel along said ribbon on an axis which is substantially transverse to the longitudinal extension of the belt.
The nails are fed individually to the firing channel under the control of an advancement device which is associated with the magazine. In practice, the device actuates the stepwise advancement of the ribbon of nails loaded in the magazine, placing the first nail of the ribbon at the firing channel, where the nail is struck forcefully by the striking mass.
The nail ribbons used with the above described nail firing tools are currently manufactured in various ways.
In particular, in the case of roundhead nails, ribbons are known which are constituted by a strip of plastics which is shaped so as to form a series of clips which are adapted to retain the nails. As shown by way of example in
FIG. 5
, the nails
10
are retained by the strip
12
proximate to the respective head
11
; the strip
12
forms the clips
13
, which individually retain the nails
10
in two appropriately spaced points.
According to another conventional solution, the nails are mutually rigidly coupled by two thin metal wires which are soldered on one side of said nails.
The nail ribbon must be guided appropriately in the magazine of the nail firing tool, particularly at the region for feeding the nails to the firing channel formed by the tube.
For this purpose, if ribbons of nails retained by a strip of plastics are used, the magazine is provided internally for example with a slotted guide in which the strip of plastics is slidingly inserted.
If instead ribbons of nails retained by two soldered metal wires are used, the metal wires slide inside corresponding grooves formed by the magazine.
In order to use both types of nail ribbon it is therefore necessary to use suitable adaptors, such as for example removable guides to be applied to the magazine if the ribbons of nails retained by a strip of plastics are used.
This of course makes the structure of the nail firing tool more complicated, with a greater risk of breakage and abnormal operation, and also makes the nail firing tool more difficult to use if it is necessary to change the type of nail ribbon.
SUMMARY OF THE INVENTION
The aim of the present invention is to solve the cited problem by providing a compressed-air nail firing tool which allows optimum feeding of the nails to the firing channel both when using ribbons of nails retained by a strip of plastics and when using ribbons of nails retained by soldered metal wires.
Within the scope of this aim, an object of the present invention is to provide a compressed-air nail firing tool which is simple in concept, definitely reliable in operation and versatile in use.
This aim and this object are both achieved by a compressed-air nail firing tool according to the present invention, comprising: a body wherein a firing channel is defined, means for the actuation of a striking blade adapted to engage a firing channel being accommodated in said body, said firing channel being formed along a tube which lies in a front region of said body; and a magazine, which is rigidly coupled to said body and is connected to said firing channel and inside which a ribbon of nails is adapted to be loaded, said nails being meant to be fed individually to said firing channel, under the actuation of an advancement device which is associated with said magazine, characterized in that a slot, which leads into said firing channel, is defined in a region for feeding said nails to said firing channel, said nails being guided with their respective head along said slot.
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patent: 3623646 (1971-11-01), Cast et al.
patent: 4319705 (1982-03-01), Geist et al.
patent: 4942996 (1990-07-01), Wolfberg et al.
patent: 5738266 (1998-04-01), Ogawa
patent: 5772098 (1998-06-01), Crutcher
patent: 5803338 (1998-09-01), Singer et al.
patent: 6032848 (2000-03-01), Dariusz
patent: 0 711 635 (1996-05-01), None
patent: 0 726 122 (1996-08-01), None
patent: 0 739 690 (1996-10-01), None
Fasco S.p.A.
Josif Albert
Modiano Guido
O'Byrne Daniel
Smith Scott A.
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