Aaron K Sandoval

US Patent:

20110097189, Apr 28, 2011

Filed:

Dec 31, 2008

Appl. No.:

12/811368

Inventors:

Aaron Sandoval - Tracy CA, US
Johann Wingard - Pretoria, ZA

International Classification:

F04D 13/04

US Classification:

415 68

Abstract:

Described herein are embodiments of a boundary layer effect turbine and a hydrodynamic speed reducer. Described is a boundary layer effect turbine that utilizes the phenomena of the boundary layer to drive a turbine impeller that is made of a plurality of spaced disks oriented along a rotatable shaft. As operating fluid is directed over surfaces of the plurality of disks of the boundary layer effect turbine, energy is transferred from the fluid to the disks as a result of the adhesive and viscous properties of the fluid.

US Patent:

20050267527, Dec 1, 2005

Filed:

Aug 1, 2005

Appl. No.:

11/194427

Inventors:

Aaron Sandoval - Tracy CA, US
Robert Presley - Colorado Springs CO, US

International Classification:

A61B017/08

US Classification:

606213000

Abstract:

A method and device provides for limiting fluid movement through a rent in a membranous tissue by forming a biocompatible and biodegradable barrier at the site of the rent. The barrier is formed by inserting into the rent a plug that includes connected water-swellable parts, so that within a short time following placement of the plug at the site the swellable parts expand in situ to form the barrier and occlude the rent. As fluids near the site are taken up by the swellable material, the material expands rapidly to fill the rent, engaging the marginal surfaces of the membrane near the edges of rent and forming a secure barrier at the site. All the materials of the plug are biocompatible and, over a period of time that allows for healing of the rent, all the components of the barrier are completely degraded without leaving any residual material at the site.