Title: Insulated building block

Abstract: An insulation strip made of closed cell plastic foam is formed in the center of a building block transverse to the webs thereof and parallel to the side walls. The insulation strip extends beyond the edge of the sidewalls by 1/4 inch on all four side edges of the block so as to provide a 1/2 inch space for mortar joints between blocks when the blocks are stacked to form a wall. In one embodiment, the edges of the insulation strip are grooved in a cross-hatched pattern which tends to make the edges compressible, thereby permitting minor dimensional changes in the size of the mortar joint to keep the blocks aligned.

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Inventors: Keleske, Henry P. (Milwaukee, WI, US)

Application Number: 569254
Filing Date: 1975-04-18
Publication_date: 1976-09-28
Assignee:
Primary Class(es): 52/309.12 52/407.1, 52/604, 52/612
Other Classes:
US Patent Ref:

1171913	Feb, 1916	Wilson	52/405.
1815921	Jul, 1931	Lapof	52/405.
3204381	Sep, 1965	Perreton	52/309.
3318062	May, 1967	Grants	52/407.
3546833	Dec, 1970	Perreton	52/405.
3704562	Dec, 1972	Grants	52/405.

Other Refs: 141,677

Aug, 1953	SW

Primary Examiner: Faw, Jr., Price C.
Assistant Examiner: Randolph, William
Attorney: Wheeler, Morsell, House & Fuller