David R Masters

US Patent:

60462558, Apr 4, 2000

Filed:

Feb 9, 1998

Appl. No.:

9/020773

Inventors:

Paul T. Gray - Laguna Hills CA
David R. Masters - Laguna Hills CA

International Classification:

C08J 932

US Classification:

523218

Abstract:

A foam of very small, microscopic bubbles of surfactant, each bubble containing a small quantity of water, is mixed with a water/cement mixture having a water to cement ratio of less than 0. 33. The small bubbles have a ball bearing effect on the smaller cement and sand particles, increasing plasticity or flowability and thus reducing the water requirements of the mixture. The foamed cement mixture is laid to form a desired concrete structure, and the bubbles disintegrate or transform to leave voids of similar size uniformly dispersed throughout the concrete structure.

US Patent:

59001917, May 4, 1999

Filed:

Jan 14, 1997

Appl. No.:

8/782409

Inventors:

Paul T. Gray - Laguna Hills CA
David R. Masters - Laguna Hills CA

Assignee:

Stable Air, Inc. - Laguna Hills CA

International Classification:

B01F 304

US Classification:

261 59

Abstract:

A foam producing apparatus has a first mixing chamber with an inner subchamber connected to a supply of gas at a first pressure and an outer subchamber connected to a supply of a foamable liquid at a second pressure higher than the first pressure. A plurality of orifices connect the outer subchamber to the inner subchamber. The foamable liquid is forced from the outer subchamber into the inner subchamber through the orifices and is atomized to form droplets carried by the gas to an outlet. A second mixing chamber is connected to the outlet of the first mixing chamber and is filled with an agitating medium so that droplets propelled through the second mixing chamber are violently agitated to produce the desired foam.