Patents by Inventor Eikichi Yamaharu

Eikichi Yamaharu 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).

  • Dry-ice blast device
    Patent number: 6890246
    Abstract: A dry-ice blast device (A) includes an air compressor (2) of a low pressure type as a source of the compressed air, the delivery pressure being 1.2-2.5 atm. Dry-ice particle feeder (5), (6) is provided for mixing dry-ice particles (D) into the air flow in the air flow path upstream from a nozzle (32). This enables low pressure blasting, which suppresses the abrasion of the dry-ice particles (D), decreases the noise, reduces the overall size and weight of the device and makes easy the handling of the device.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: May 10, 2005
    Inventor: Eikichi Yamaharu
  • Dry-ice blast device
    Publication number: 20040005848
    Abstract: A dry-ice blast device (A) includes an air compressor (2) of a low pressure type as a source of the compressed air, the delivery pressure being 1.2-2.5 atm. Dry-ice particle feeder (5), (6) is provided for mixing dry-ice particles (D) into the air flow in the air flow path upstream from a nozzle (32). This enables low pressure blasting, which suppresses the abrasion of the dry-ice particles (D), decreases the noise, reduces the overall size and weight of the device and makes easy the handling of the device.
    Type: Application
    Filed: April 17, 2003
    Publication date: January 8, 2004
    Inventor: Eikichi Yamaharu
  • Abrasive brasting apparatus and die finishing apparatus using the same
    Patent number: 5562531
    Abstract: An abrasive blasting apparatus is provided which comprises a blast nozzle arranged in a blast chamber for blasting, toward a workpiece, two different kinds of abrasive particles separately supplied from a first abrasive container and a second abrasive container. The abrasive particles falling to the bottom of the blast chamber are collected by an abrasive collector, and the collected abrasive particles are separated by an abrasive separating system into those of the first abrasive material and those of the second abrasive material. The two different portions of the abrasive particles are returned separately to the first and second abrasive containers through feedback conduits.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: October 8, 1996
    Inventor: Eikichi Yamaharu
  • Method and apparatus for pretreating electronic component manufacturing frame
    Patent number: 5533922
    Abstract: A method is provided for pretreating an electronic component manufacturing frame which is prepared by punching. The method comprises blasting abrasive particles entrained in a high speed air stream toward the frame, wherein the abrasive particles has an average diameter of no more than 200 micrometers, preferably no more than 100 micrometer, particularly no more than 50 micrometers. The abrasive particles may be advantageously made of glass.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: July 9, 1996
    Inventor: Eikichi Yamaharu