Window and door form for prefabricated concrete walls

Abstract

A wall and port form for forming a concrete wall having a port for mounting a window or a door includes a building wall form having a wall form perimeter wall and a wall form bottom wall; a portal form for placement within the building wall form perimeter wall for defining an opening for one of a door and a window, the portal including a portal form perimeter wall configured as a closed loop encompassing a port space and preventing concrete poured into the wall form from flowing into the port space encompassed by the portal form, and a form elevating and dislodgement mechanism for elevating the portal form relative to the building wall form upon curing of concrete within the wall form and thereby freeing it from the grip of the concrete.

I claim as my invention:  
     
         1 . A wall and port form for forming a concrete wall having a port for mounting a window or a door, comprising: 
 a building wall form having a wall form perimeter wall and a wall form bottom wall;    a portal form for placement within said building wall form perimeter wall for defining an opening for one of a door and a window, said portal comprising a portal form perimeter wall configured as a closed loop encompassing a port space and preventing concrete poured into said wall form from flowing into the port space encompassed by said portal form, and form elevating and dislodgement means for elevating said portal form relative to said building wall form upon curing of concrete within said wall form and thereby freeing it from the grip of the concrete.    
     
     
         2 . The wall and port form of  claim 1 , wherein said portal form has interior corners and wherein said form elevating and dislodgement means comprises screw retaining plates extending across each interior corner of said portal form perimeter wall, each said retaining plate having an internally threaded screw bore and an elevating screw engagingly screwed through each said screw bore, and wherein each said elevating screw is of sufficient length that rotating said screws a certain number of turns causes each said screw to bear against said bottom wall and cause a resultant upward force on said portal form, dislodging said portal form from cured wall concrete in said wall form and elevating said portal form.  
     
     
         3 . The wall and port form of  claim 1 , wherein said portal form perimeter wall is one of substantially square and substantially rectangular.  
     
     
         4 . The wall and port form of  claim 1 , wherein said portal form perimeter wall has a wall upper edge and a wall lower edge and has a wall outer face which is tapered inwardly from said wall upper edge to said wall lower edge for lower resistance dislodgement.  
     
     
         5 . The wall and port form of  claim 1 , wherein said portal form perimeter wall outer face is stepped to define window and door mounting steps in the resulting port in the formed concrete wall.  
     
     
         6 . The wall and port form of  claim 1 , wherein said outer face of said portal form perimeter wall is covered with an adhesion-resistant coating prior to pouring concrete into said wall form.