Paul P Murphy

US Patent:

43996450, Aug 23, 1983

Filed:

Dec 15, 1980

Appl. No.:

6/216320

Inventors:

Paul D. Murphy - Frankfort OH
Clinton A. Reph - Amherst OH

International Classification:

E04G 910
E04B 162
E04G 2300

US Classification:

52743

Abstract:

Bladder insulation which is adapted to be inserted within the wall cavities of existing buildings is disclosed which provides for high quality insulation having a high R value. The invention describes a bladder or impervious bag constructed of two thermoplastic sheets of material hermetically sealed at both ends and on each of the sides. The preferred film used herein is urethane although polyethylene of from 4 to 15 mils in thickness may be employed on the inside and/or the outside of the bladder. This bag can be inflated within the wall cavity and filled with various insulative materials and/or pressurized with various fluorinated hydrocarbon gases. The various insulative fill materials used may be, but to be all not inclusive, vermiculite, mineral wool, microballoons of either glass or plastic, and eggcrates, or any combinations of these materials. An expandable eggcrate device constructed of thermoplastic material in a collapsed state and sandwiched between two layers of thermoplastic material that expands into an eggcrate when inflated creates a semi-rigid plastic material. The gaseous medium used in this invention consists preferably of fluorinated hydrocarbon gas, CO. sub. 2 or N. sub.