Anchor bolt form

Claim 1

In combination with an anchor bolt of the type adapted to be embedded in a concrete foundation and having a shank of substantially uniform diameter throughout its length including a head at its lower end and a threaded portion at its upper end for securing machinery and the like in position on the concrete foundation a plurality of forms, each of said forms comprising an axially elongated hollow shell of severable plastic material including an integral axially elongated sleeve portion having a plurality of generally cylindrical sections including a lOwer end section and a plurality of upper sections, said lower end section having an outside diameter substantially equal to the inside diameter of each of said upper sections, said sleeve including a plurality of axially spaced coaxial annular ribs, each of said ribs being disposed intermediate an associated one and another of said sections, each of said ribs projecting radially outwardly beyond said sections, said sleeve portion having upper and lower end walls, said shell having coaxial upper and lower neck portions, each of said neck portions extending axially outwardly from an associated one of said end walls and having a coaxial bore therethrough communicating with the interior of said shell, said lower neck portion having a diameter substantially equal to the diameter of said bolt, said shell having thread engaging means on said upper neck portion for coacting with the threaded upper end portion of said bolt to permit axial adjustment of said shell relative to said bolt upon relative rotation therebetween, one of said forms receiving said bolt therethrough and having its thread engaging means in engagement with said threaded upper end portion and its lower neck portion in surrounding engagement with an associated portion of said shank, another of said forms having an upper portion severed therefrom below said upper end wall thereof and receiving said bolt therethrough, said other form having at least a portion of one of said upper sections thereof in surrounding engagement with said lower section of said one form and having its lower neck portion in surrounding engagement with an associated portion of said shank below said one form whereby to extend the effective operative length of said one form relative to said bolt.