Patent ID: 6915613

Claim:
A concrete form comprising: a. opposing sidewalls, each sidewall including webs embedded therein, wherein each web includes a protruding web portion extending out of the sidewall towards the other sidewall of the concrete form, and b. spacers extending between the sidewalls, each spacer including at least a pair of rigid spacer links, each spacer link including: i. a wall end pivotally linked to one of the protruding web portions of a sidewall, wherein the wall end includes corners which interfere with the sidewall about which the spacer link pivots, the corners being oriented such that the spacer link clicks into an orientation at least substantially perpendicular to the sidewall and resists further pivoting from such an orientation; and ii. an elbow end pivotally linked to another of the spacer links within the spacer. wherein the sidewalls may be: (1) expanded into spaced relationship wherein the spacer links are oriented at least substantially perpendicular to the sidewalls, or (2) collapsed into closely adjacent relationship wherein the spacer links are oriented at least substantially parallel to the sidewalls.