Glenn R Collings

US Patent:

20130037979, Feb 14, 2013

Filed:

Jun 1, 2012

Appl. No.:

13/486433

Inventors:

Ralph Hanson - East Hampton MN, US
Glenn R. Collings - Burnsville MN, US

Assignee:

D & L Innovations, Inc. - Hampton MN

International Classification:

B28B 7/02
E04B 1/16
B31C 1/00
B28B 7/00

US Classification:

264 35, 249170, 249 13, 493269

Abstract:

An example of a concrete form includes a sleeve with top edge and a bottom portion with a bottom edge generally parallel to the top edge. The bottom portion includes a plurality of bottom severance lines extending from the bottom edge to the top portion, and the top portion including a plurality of top creases extending from the top edge to the bottom portion. The top creases are generally perpendicular to the top and bottom edges. The top creases at least partially define a plurality of top panels around a periphery of the sleeve, and the bottom severance lines at least partially define a plurality of bottom panels configured to flare out when concrete is poured into the sleeve.