Lift anchor for concrete panel

Abstract

An anchor for use in a concrete panel that has a shank with four sides forming a substantially square longitudinal cross-section. One end of the shank is connected to a foot and is embedable in the concrete panel. An opposite end of the shank is connected to a head and is locatable in a recess in the concrete panel.

What is claimed is:  
     
         1 . An anchor for use in a concrete panel having a recess in a surface of the concrete panel, the anchor comprising: 
 a shank comprising 
 four sides forming a substantially square longitudinal cross-section,  
 one end adapted to be embedable in the concrete panel, and  
 an opposite end adapted to extend into the recess in the concrete panel;  
   a foot connected to the one end of the shank and adapted to be embedable in the concrete panel; and    a head connected to the opposite end of the shank and adapted to be disposed in the recess in the concrete panel.    
     
     
         2 . An anchor for use in a concrete panel having a recess in a surface of the concrete panel, the anchor comprising: 
 a forged unitary body comprising 
 a shank comprising 
 four substantially mutually perpendicular sides of equal width and forming a substantially square longitudinal cross-section,  
 one end adapted to be embedable in the concrete panel, and  
 an opposite end adapted to extend into the recess in the concrete panel;  
 
 a foot connected to the one end of the shank and adapted to be embedable in the concrete panel, the foot having a substantially circular longitudinal cross-section; and  
 a head connected to an opposite end of the shank and adapted to be disposed in the recess in the concrete panel, the head having a substantially circular longitudinal cross-section.  
   
     
     
         3 . The anchor of  claim 2  wherein the head comprises: 
 an outward extending substantially cylindrical portion with a diameter greater than the width of the sides of the shank; and  
 a head transition having an outer end connected to the cylindrical portion and an inner end connected to the opposite end of the shank, the outer end having a diameter substantially equal to the diameter of the cylindrical portion and the inner end having a diameter substantially equal to the width of the sides of the shank.  
 
     
     
         4 . The anchor of  claim 3  wherein the head transition has a centerline cross-sectional profile that is curvilinear between the ends of the head transition.  
     
     
         5 . The anchor of  claim 4  wherein the head transition has a partial spherical shape between the ends of the head transition.  
     
     
         6 . The anchor of  claim 2  wherein the foot comprises: 
 an outer substantially cylindrical portion with a diameter greater than the width of the sides of the shank; and  
 a foot transition having an outer end connected to the cylindrical portion and an inner end connected to the one end of the shank, the outer end having a diameter substantially equal to the diameter of the cylindrical portion and the inner end having a diameter substantially equal to the width of the sides of the shank.  
 
     
     
         7 . The anchor of  claim 6  wherein the foot transition has a centerline cross-sectional profile that is curvilinear between the ends of the foot transition.  
     
     
         8 . The anchor of  claim 7  wherein the foot transition has a partial spherical shape between the ends of the foot transition.  
     
     
         9 . A structural member comprising: 
 a concrete panel comprising 
 two substantially parallel major surfaces extending across a length and width of the concrete panel,  
 at least one end surface extending between the opposing major surfaces and defining an end of the concrete panel,  
 a recess disposed in one of the major surfaces of the concrete panel; and  
   an anchor comprising 
 a shank comprising 
 four substantially mutually perpendicular planar surfaces forming a substantially square longitudinal cross-section extending over a length of the shank,  
 one end disposed in the end of the concrete panel, and  
 an opposite end extending from the one of the major surfaces and into the recess,  
 
 a foot connected to the one end of the shank and disposed in the concrete panel, and  
 a head connected to the opposite end of the shank and disposed in the recess in the concrete panel, the head being adapted to engage a lifting device for lifting the concrete panel.