Concrete anchor

1. An anchor rod support, comprising:

a) a support having a floor and at least three legs extending downwardly from the floor with openings between the legs, the floor including a through opening, the support is embedded in concrete; and

b) the support including threads for attaching thereto an anchor rod.

2. An anchor embedded in concrete for supporting a load, comprising:

a) a rod having a first threaded end portion embedded in concrete;

b) a support embedded in the concrete, the support having a floor and legs;

c) the support including threads for attaching the first threaded end portion to the support; and

d) the legs are wedge-shaped, extending wide to narrow from the floor.

3. An anchor as in claim 2 , wherein the support is molded.

4. A holder for an anchor rod, comprising:

a) a support without legs, the support including a floor portion, the support including a plurality of openings for receiving respective nails for attaching the support to a concrete form;

b) the support including a central threaded opening in the floor portion for threadedly receiving an end portion of an anchor rod; and

c) the floor portion including a top surface and a bottom surface, the bottom surface is flat across the floor portion so as to lay on a surface of a concrete form prior to the support being embedded in concrete in the concrete form.

5. An anchor embedded in concrete for supporting a load, comprising:

a) a rod having a first end portion embedded in concrete and a second end portion for attachment to a load;

b) an anchor body threaded to the first end portion, the anchor body being embedded in concrete, the anchor body including a through opening;

c) the anchor body including a first cylindrical portion; and

d) the anchor body includes a second cylindrical portion, the first cylindrical portion including a larger diameter than the second cylindrical portion, the second cylindrical portion being disposed closer to the second end portion than the first cylindrical portion.

6. An anchor embedded in concrete for supporting a load, comprising:

a) a rod having a first end portion embedded in concrete and a second end portion for attachment to a load;

b) an anchor body threaded to the first end portion, the anchor body being embedded in concrete;

c) the anchor body including a cylindrical portion, the cylindrical portion including a bottom end portion;

d) a circumferential groove disposed at the bottom end portion; and

e) a split ring is disposed in the circumferential groove, the split ring including a portion extending beyond a surface of the cylindrical portion.