Patent Publication Number: US-4223866-A

Title: Adjustable bracket

Description:
This is a Continuation-In-Part application of Ser. No. 681,155, filed Apr. 28, 1976, now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention relates to support devices, and more particularly, to adjustable, concrete form bracket. 
     It is, therefore, the principal object of this invention to provide an adjustable concrete bracket, which will be of the hanger type. 
     Another object of this invention is to provide a bracket of the type described, which will save approximately 20% on labor installing and erection, and approximately 30% on labor in removing and wrecking out deck forms. 
     Another object of this invention is to provide an adjustable concrete form bracket, which will be particularly adaptable for bridge decks on pre-stressed concrete beams, &#34;I&#34; beams and bridge type box culverts. 
     A further object of the present invention is to provide a bracket of the type described, which may also be used to form concrete tops on basements, storm cellars, and also decks and floors in multi-story buildings. 
     Other objects of the invention are to provide an adjustable concrete form bracket, which is simple in design, inexpensive to manufacture, rugged in construction, easy to use and efficient in operation. 
     SUMMARY OF THE INVENTION 
     In accordance with the preferred embodiment of the present invention, it is suggested to provide an adjustable, concrete form bracket for being used in pairs and being comprised of a pair of spaced-apart side walls extending in parallel from a rear wall; and L-shaped member is connected to the bracket for depending the bracket from a beam; and means such as a plate is provided to support and position a joist between the side walls; this support means, e.g., the plate is preferably held on a threaded bolt, threadedly received in another plate which is removably positioned in a particular position between the side walls. A U-shaped strap with a bolt fastener permits vertical alignmemt and orientation of the bracket. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     While the specification concludes with claims particularly pointing out and distinctly claiming the subject matter which is regarded as the invention, it is believed that the invention, the objects and features of the invention and further objects, features and advantages thereof will be better understood from the following description taken in connection with the accompanying drawings in which: 
     FIG. 1 is a side view of the present invention, shown in use; 
     FIG. 2 is a right end view of the invention, shown in elevation, and removed from FIG. 1; 
     FIG. 3 is similar to FIG. 1, but shows the device with an adjustable support added thereon, for use on steel beams and plate girders; and 
     FIG. 4 is a plan view of the adjustable support, shown removed from FIG. 3. 
    
    
     According to this invention, an adjustable concrete form bracket 10 is shown to include a pair of parallel spaced-apart side walls 11 and a rear wall 12, to establish a structure of U-shaped cross-section in horizontal cross-section or top elevation. 
     An L-shaped member or plate 13 is connected to the bracket, e.g. welded to rear wall 12. The short leg of L-shaped plate 13 is configured as a tapered lip 14 and extends above the rear wall 12, for engaging the upper corner of a prestressed concrete beam 15. An elongated opening 15a through rear wall 12, removably receives the lip 16 of L-shaped plate 17. A nut fastener 18 is secured fixedly, by welding or other suitable means, to plate 17, and threadably receives a bolt fastener 19. A plate 20 is rotatably secured to the end of bolt fastener 19; this way, the plate is positioned inside of bracket 10 between the side walls 11. The plate 20 abuts with the underside 21 of a joist 21a to position and to support that joist. The end of joist 21a is received within the opening 21b, defined by side walls 11 of bracket 10. A wedge 21d is interposed between the rear wall 12 and joist 21a. 
     As will be readily seen in FIGS. 1 and 2 of the drawing, plate 17 provides support means for joist 21a in an adjustable manner, through the use of bolt fastener 19, threaded into the nut fastener 18 of plate 17. The extending end of plate 17 is supported upon removable pin 22, which receives a key 23. 
     Side walls 11 are provided with a plurality of spaced-apart openings 24 along their respective angular side edges, and openings 25 in each of the lower portions of side walls 11 are provided, for a purpose which will hereinafter be described. The openings 24 provide a means of receiving nail fasteners. Brackets 10 are used in pairs and positioned to oppose each other and the ends of joist 21a are spaced sufficiently from the rear walls 12, so as to enable the joist 21a to be lowered, after removing the nails and pin. After the plyforms 21c are removed, the shell of the bracket 10 is removed by prying it out of the concrete 15, the wedge lip 14 hung over the top of the beam 15, which should have been greased or booted with plastic or a rubber cover, so that the concrete will not bond to the metal. 
     Prior to removing brackets 10, the pin 22 is removed, so as to enable the joist 21a to be dropped from the opening 21b. 
     Referring now to FIGS. 3 and 4 of the drawing, a U-shaped strap 26 is shown to include a nut fastener 27, threaded onto bolt fastener 28, the head of which abuts with the web 29 of wide flanged &#34;I&#34; beam 30. U-shaped strap 26 is removably secured to side walls 11 by means of pins 22 receiving each a key 23. One of these pins 22 was mentioned earlier as support for plate 17, therefore, this particular pin fulfills a double function: It supports plate 17 and fastens strap 26. The latter strap is additionally fastened by a second pin 22 traversing openings 25 and being held by a key similar to key 23. The tapered lip 14 of plate 13 serves to abut with and engage the outer peripheral side edge 31 of beam 30. With the above mentioned arrangement, the support is similar to that heretofore described of FIGS. 1 and 2. 
     The invention is not limited to the embodiments described above but all changes and modifications thereof not constituting departures from the spirit and scope of the invention are intended to be included.