Patents by Inventor Alva Wesley Metcalf

Alva Wesley Metcalf has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6250996
    Abstract: Systems for abrasive action include machinery for creating a vacuum and positive pressure to enable flow control while providing adequate vacuum to both retrieve and capture the spent abrasive material and the abraded material. A first embodiment includes a vacuum and boost operation facilitated by the use of a foot control for high control of abrasion, cleaning and polishing. A second embodiment is for use with human tissue and includes a vacuum only system with filtered air. A third embodiment includes vacuum with automatic boost for skilled medical personnel use and uses a minimum vacuum level to trigger a pre-set boost operation. The system utilizes air filtration, ultra violet, heat oven sterilization and secure waste storage. A manual contact tool is used closely with the area to be abraded supplanting any other control other than the pressing of the manual contact tool against the surface to be abraded, to create sufficient vacuum to trigger boost operation.
    Type: Grant
    Filed: November 26, 1999
    Date of Patent: June 26, 2001
    Inventors: Alva Wesley Metcalf, Calvin Lon Carrier
  • Patent number: 6238275
    Abstract: Systems for abrasive action include machinery for creating a vacuum and positive pressure to enable flow control while providing adequate vacuum to both retrieve and capture the spent abrasive material and the abraded material. A first embodiment includes a vacuum and boost operation facilitated by the use of a foot control for high control of abrasion, cleaning and polishing. A second embodiment is for use with human tissue and includes a vacuum only system with filtered air. A third embodiment includes vacuum with automatic boost for skilled medical personnel use and uses a minimum vacuum level to trigger a pre-set boost operation. The system utilizes air filtration, ultra violet, heat oven sterilization and secure waste storage. A manual contact tool is used closely with the area to be abraded supplanting any other control other than the pressing of the manual contact tool against the surface to be abraded, to create sufficient vacuum to trigger boost operation.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: May 29, 2001
    Inventors: Alva Wesley Metcalf, Calvin Lon Carrier