Abstract:
The present invention provides a spreadable anchor assembly comprising a plural leg flange nut with a perforated cap carrying a driven spreader, the cap being made of thick paper and having centrally a perforated circular line inside the top opening of the flange nut, the top of the spreader adhering to the lower side of the cap.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The anchor of the present invention belongs to U.S. Cl. 85/32.1, 45, 26; 151/14, 44; namely flanged coupling nuts, driving contacts screws, and point spreaders locking nails; side locked nut, thread lock coupled nut and bolt. 
     2. Description of the Prior Art 
     Generally the expandable anchor embedding its legs into the hole surface of a wall by a spreader is kept separate from the spreader as shown for example my pending U.s. patent application Ser. No. 444,877 filed Feb. 22, 1974, titled &#34;TOEING FLANGE NUT&#34;, and consequently without the facility of driving the spreader as a separate part especially at a building site. 
     On the contrary the spreadable anchor assembly of the present invention provides a support in the form of a capped flange nut containing a spreader therein as one set so that it is very easy for a field worker to mount the anchor of the present invention. 
     SUMMARY OF THE INVENTION 
     The present invention provides a spreadable anchor assembly comprising a plural leg flanged nut with a perforated cap having a driven spreader adhered thereto; the cap being made of thick paper and having centrally a perforated circular line inside the top opening of the nut; the top of the spreader being adhered to the lower side of the cap. With considerable facility a set which includes the flange nut and spreader contained therein can be used by punching out the cap at a center mark, the hanging spreader being directly driven to spread the flange legs out to be pressed against the wall, without any trouble of holding and inserting the spreader by the field worker. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     FIG. 1 is a front elevation of a flange nut of the present invention. 
     FIG. 2 is a top plan view of the flange nut thereof. 
     FIG. 3 shows under a punch a section along the lines 3-3 of FIG. 1. 
     FIG. 4 is a front elevation of a driven cap spreader of the present invention. 
     FIG. 5 is a cross-section of the anchoring flange nut of the present invention embedded in the wall for securing or adjusting a bolt. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The anchoring flange nut of the present invention will be described in more detail in connection with a preferred embodiment. 
     The cap flange nut of the present invention comprises a flange nut 1, a driven spreader 2 and a cap lid 3. The cap lid 3 is made of thick paper. The cap lid 3 is adhered on the top of the flange nut 1. The driven spreader 2 is hung from the cap lid 3 centrally by sticking thereto. 
     A perforated circular line 4 is centrally made through the cap lid 3. 
     A flange 5 is formed at the top of the nut 1. 
     A screw thread 6 is formed at the inner upper part of the nut 1. 
     A stepped part 7 is provided at the inner lowest part of the nut 1. 
     A tapered hole 8 is formed at the bottom of the nut 1. 
     Slits 9 are formed from one end of and in parallel with the axis of the nut 1. 
     An outer screw thread 10 is formed at the lower part of the nut 1. 
     A stop rim 11 is peripherally made at the top of the driven spreader 2, which is situated beneath and adhered to the cap lid 3. 
     An indentation 12 is formed on the top of the spreader 2 beneath a mark 13 on the cap lid 3 for a punch 14. 
     To explain usage of the anchoring flange nut in accordance with FIGS. 3 and 5, a side cavity A is made on a wall B firstly, the flange nut being fitted into the cavity A secondarily, the punch 14 punching the center of the cap lid 3 out to drive the spreader 2 into the hole 8 to spread the outer screw threads 10 out to fix into the wall B with stopping of the rim 11 at the stepped part 7 of the nut 1 thirdly. 
     Finally such a support having an external screw thread as a bolt C will be secured into the nut embedded solidly in the wall B. 
     It will thus be seen that according to the invention the spreadable anchor assembly includes the elongated tubular sleeve 1 which has opposed open ends at the region of one of which the sleeve 1 is formed with the interior threads 6 while at the region of its opposite end the sleeve 1 is formed with the longitudinal slits 9 forming the spreadable legs of the anchoring sleeve 1. At its one end where the thread 6 is located the open end of the sleeve 1 is closed by a cap 3 in the form of a sheet material, such as paper, which can be easily ruptured, the tapered spreader element 2 being situated in the interior of the sleeve 1 and initially adhering to the inner surface of the sheet material 3. At its end which is formed with the longitudinal slits 9 the sleeve 1 has the inwardly extending flanges 7 formed with the tapered opening 8 which cooperates with the tapered spreader element 2 when the latter is driven by the punch 14 to the position shown in FIG. 5, with the sheet material 3 of course rupturing along the circular line of perforations 4, these perforations having a diameter corresponding to the outer diameter of the lip 11 of the spreader element 2 and the circle along which the perforations 4 extend of course being smaller than the inner diameter of the sleeve 1 and the end to which the cap 3 is adhered, this end having the flange 5 which limits the inward movement of the sleeve 1 into the cavity in the wall. 
     As many embodiments of the present invention may be made without departing from the spirit and scope thereof, it is to be understood that the invention includes all such modifications and variations as come within the scope of the appended claim.