Interlocking concrete joint forms

Abstract

An interlocking concrete joint form including a metal stake having a flattened end containing a plurality of serrations and an elongated metal form having a generally flat top portion and a pair of parallel planer side portions, wherein one of the side portions contains an inwardly facing inner portion which forms a locking pawl for interacting with the serrations of the metal stake and wherein neither side portion contains a key-joint portion.

1 . An interlocking concrete joint form comprising 
 a metal stake having a generally flattened end, wherein the flattened end contains a plurality of serrations formed on one side of the flattened end, and    an elongated metal form capable of interlocking with the metal stake, wherein the elongated metal form comprises a generally flat, top portion and generally parallel, planer side portions, each extending at a angle of about 90° in the same direction away from the top portion, wherein one of the side portions is shorter than the other side portion, wherein the bottom edge of the shorter side portion furthest away from the top portion comprises a hook portion having a downwardly turned flange and an inwardly facing inner portion which forms a locking pawl, wherein the second longer side portion containing an outwardly extending horizontal section, located approximately the same distance from the flat top portion as the hook portion of the first side portion and wherein neither side portion contains a key-joint portion.    
   
   
       2 . An interlocking concrete joint form comprising 
 a metal stake having a generally flattened end, wherein the flattened end contains a plurality of serrations formed on one side of the flattened end, and    an elongated metal form capable of interlocking with the metal stake, wherein the elongated metal form comprises a generally flat, top portion and generally parallel, planer side portions, each extending at a angle of about 90° in the same direction away from the top portion, wherein one of the side portions is shorter than the other side portion, wherein the bottom edge of the shorter side portion furthest away from the top portion comprises a hook portion having a downwardly turned flange and an inwardly facing inner portion which forms a locking pawl, wherein the second longer side portion containing an outwardly extending horizontal section, located approximately the same distance from the flat top portion as the hook portion of the first side portion and wherein neither side portion contains a key-joint portion and wherein the metal stake further comprises an extended, raised portion, raised from the plurality of serration, wherein the raised portion prevents the shorter side portion from extending further down the metal stake.    
   
   
       3 . An interlocking concrete joint form comprising 
 a metal stake having a generally flattened end, wherein the flattened end contains a plurality of serrations formed on one side of the flattened end, and    an elongated metal form capable of interlocking with the metal stake, wherein the elongated metal form comprises a generally flat, top portion and generally parallel, planer side portions, each extending at a angle of about 90° in the same direction away from the top portion, wherein one of the side portions is shorter than the other side portion, wherein the bottom edge of the shorter side portion furthest away from the top portion comprises a hook portion having a downwardly turned flange and an inwardly facing inner portion which forms a locking pawl, wherein the second longer side portion containing an outwardly extending horizontal section, located approximately the same distance from the flat top portion as the hook portion of the first side portion and wherein neither side portion contains a key-joint portion and wherein each of the serration are formed in the shape of an upwardly tapered tooth having a lower, generally horizontal undercut separating it from the next lower serration.    
   
   
       4 . The interlocking concrete joint form of  claim 1 , wherein the space between the serrations of the metal stake is approximately equal to the thickness of the locking pawl of the first side portion of the elongated metal form.  
   
   
       5 . The interlocking concrete joint form of  claim 1 , wherein the height of the shorter side portion and the longer side portion is from about 1 to about 3 inches.  
   
   
       6 . The interlocking concrete joint form of  claim 1 , wherein the difference in height between the shorter side portion and the longer side portion is from about ½ inch to about 2 inches.  
   
   
       7 . The interlocking concrete joint form of  claim 2 , wherein the space between the serrations of the metal stake is approximately equal to the thickness of the locking pawl of the first side portion of the elongated metal form.  
   
   
       8 . The interlocking concrete joint form of  claim 3 , wherein the space between the serrations of the metal stake is approximately equal to the thickness of the locking pawl of the first side portion of the elongated metal form.  
   
   
       9 . The interlocking concrete joint form of  claim 2 , wherein the height of the shorter side portion and the longer side portion is from about 1 to about 3 inches.  
   
   
       10 . The interlocking concrete joint form of  claim 3 , wherein the height of the shorter side portion and the longer side portion is from about 1 to about 3 inches.  
   
   
       11 . The interlocking concrete joint form of  claim 2 , wherein the difference in height between the shorter side portion and the longer side portion is from about ½ inch to about 2 inches.  
   
   
       12 . The interlocking concrete joint form of  claim 3 , wherein the difference in height between the shorter side portion and the longer side portion is from about ½ inch to about 2 inches.