Patent Publication Number: US-6213371-B1

Title: Device for nailing base sheet fasteners

Description:
II. BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a device for nailing base sheet fasteners, and more specifically, to a device to be used with a pneumatic nail gun. 
     2. Description of the Related Art 
     Presently when a user needs to affix base sheet fasteners to surfaces (flat), a heavy magnetized manual rod is used. The user places a base sheet fastener onto the magnetic tip of the rod, manually lifts the rod and then forcefully strikes the surface with the rod thereby affixing the base sheet fastener onto the surface. Instead of manually placing these base sheet fastener on surfaces, the present invention allows the user to automatically affix them in safe coordination with the operation and mechanism of a nail gun. The nail gun includes a trigger that a user continuously presses while lifting and dropping the nail gun, allowing the user to place a base sheet fastener onto the magnetic hammer while the hammer is in the retracted position and upon dropping the nail gun, the magnetic hammer automatically strikes the surface thereby fixating the base sheet fastener in a safe and efficient manner. 
     There are several nail gun designs in the prior art but to the best of applicant&#39;s knowledge, none of them include an automatic base sheet fastener dispenser for nail guns. One of these nail guns is manufactured by Hitachi Koky, under model No. NV45AB. Thus, the present invention increases the efficiency of a user performing this task. 
     III. SUMMARY OF THE INVENTION 
     It is one of the main objects of the present invention to provide a hammer for a nail gun to automatically nail base sheet fasteners onto a surface. 
     It is another object of this invention to provide a device that is safe and efficient to operate. 
     It is yet another object of this invention to provide such a device that is inexpensive to manufacture and maintain while retaining its effectiveness. 
     Further objects of the invention will be brought out in the following part of the specification, wherein detailed description is for the purpose of fully disclosing the invention without placing limitations thereon. 
    
    
     IV. BRIEF DESCRIPTION OF THE DRAWINGS 
     With the above and other related objects in view, the invention consists in the details of construction and combination of parts as will be more fully understood from the following description, when read in conjunction with the accompanying drawings in which: 
     FIG. 1 is an isometric representation of the present invention mounted on a nail gun shown in phantom. 
     FIG. 2 is a cross sectional view taken from line  2 — 2  in FIG.  1 . 
     FIG. 3 is an exploded view of the present invention. 
     FIG. 4 is a cross sectional view of the invention during use. 
    
    
     V. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring now to the drawings, where the present invention is generally referred to with numeral  10 , it can be observed that it basically includes plate  20 , receiving assembly  30 , hammer assembly  40 , and trigger safety mechanism  50 . 
     As seen in FIG. 1, plate  20  has exterior face  24  and interior face  26  (shown in FIG.  2 ). In the preferred embodiment, plate  20  has a plurality of through holes  22  for attachments of screws, rivets, or similar devices, to removably secure plate  20  to nail gun G (shown in phantom). 
     Perpendicularly mounted to plate  20  is receiving assembly  30 . Receiving assembly  30  is defined by end  38  and end  39  and has a partial cylindrical shape with a longitudinal curved cutout  33 . Receiving assembly  30  is slightly larger in diameter than magnetic head  46  for a slidable fit. The magnetism tends to attract base sheet fasteners T to the proper place. Longitudinal curved cut-out  33  decreases approaching end  38 , therefore the surface area closer to end  39  is smaller than that of end  38 . This allows a user to place base sheet fasteners T through curved cutout  33  while hammer assembly  40  is in the retracted position. Base sheet fastener T is contained within receiving assembly  30 . In the retracted position, magnetic head  46  is at a predetermined position nearest end  39  within receiving assembly  30 . After hammer assembly  40  is actuated, magnetic head  46  automatically returns to its predetermined position nearest end  39  within receiving assembly  30 . Through holes  32 , near end  39 , make nail gun G lighter and allow for the escape of air as magnetic head  46  returns to its predetermined position. Socket assembly  45  on back of magnetic head  46  pivotally keeps rounded tip  44  of shaft  42  in place. One end of shaft  42 , the internal end, includes piston head assembly  70 . 
     Slidably secured to the outer surface of receiving assembly  30  is trigger safety mechanism  50 . Headed studs  34  and  34 ′ are perpendicularly mounted to the outer surface of receiving assembly  30  and keep trigger safety mechanism  50  slidable in place. Stud heads  36  and  36 ′ secure trigger safety mechanism on studs  34 . Additionally stud heads  36  and  36 ′ secure L-shaped plate  37  and plate  37 ′ respectively. L-shaped plate  37  and plate  37 ′ hold spring  35  in place. In the relaxed position, spring  35  are decompressed and tip  54  of trigger safety mechanism  50  slightly surpasses end  38  of cylindrical receiving assembly  30  a result, trigger safety mechanism leg  52  does not make contact with a safety button B on gun G. When a user presses trigger R of gun G and places end  38  on a surface, tip  54  and trigger safety mechanism  50  are pushed back, compressing spring  35  and causing trigger safety mechanism leg  52  to make contact with safety button B on gun G, thereby actuating the latter. 
     FIG. 2 shows a cross sectional view of the preferred embodiment. Piston head assembly  70  and impact absorption element  60  are parts found in common nail guns. Piston head assembly  70  is fixedly secured to shaft  42 . O-ring  72  prevents air from escaping a pressurized area within nail gun G. When activated, piston head assembly  70  moves towards internal face  26 . Absorption element  60  protects internal face  26  from piston head assembly  70 . 
     Hammer assembly  40  is made of a durable material such as stainless steel, or equivalent. At the end of shaft  42  is rounded tip  44 . Magnetic head  46  has cavity  47  and angled interior walls  48 . Rounded tip  44  is snugly fitted inside cavity  47  of socket assembly  45 . Concave interior walls  48  allow magnetic head  46  to swivel freely thereby allowing certain angular latitude for shaft  42  without breaking. Gun G can be positioned approximately between 0 to 10 degrees from the perpendicular line to targeted surface. 
     Plate  20  has interior face  26 , exterior face  24  and aperture  29  for receiving half bushings  28  and  28 ′ to rest thereon. Half bushings  28  and  28 ′ are identically shaped and each have a longitudinal central channel  23 . When half bushings  28  and  28 ′ are joined together, shaft  42  snugly fits within the resulting complemented longitudinal channel. Half bushings  28  and  28 ′ are received by bore  31  and counter-bore  31 ′. 
     The foregoing description conveys the best understanding of the objectives and advantages of the present invention. Different embodiments may be made of the inventive concept of this invention. It is to be understood that all matter disclosed herein is to be interpreted merely as illustrative, and not in a limiting sense.