Patents by Inventor Gordon Pearlman

Gordon Pearlman 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).

  • Sanding head for a sanding machine
    Patent number: 5514027
    Abstract: A sanding head for a rotary sanding machine. The sanding head includes a rotatable disk and a plurality of abraders. The disk has a bottom surface and an outer circumferential edge. The bottom surface of the disk has uniformly distributed topographical variations that extend radially inwardly from the outer edge of the disk. A plurality of conformly distributed abraders project from the bottom surface of the disk to contact the surface to be sanded.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: May 7, 1996
    Assignee: Pearl Abrasive Co.
    Inventor: Gordon Pearlman
  • Paired dimmers for controlling harmonic currents
    Patent number: 5506480
    Abstract: A control system for a plurality of switched loads includes an AC line and a neutral wire and a pair of loads coupled in parallel between the AC line and the neutral. The switched loads may be operated so that one load in the pair operates in forward phase control mode and the other load in the pair operates in reverse phase control mode. This reduces harmonic current in the neutral wire otherwise resulting from odd order harmonics generated by the switching of AC current into the load during normal operation.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: April 9, 1996
    Assignee: Entertainment Technology, Inc.
    Inventors: Steven B. Carlson, Gordon Pearlman
  • Abrasive pin for a sanding machine head
    Patent number: D369814
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: May 14, 1996
    Assignee: Pearl Abrasive Company
    Inventors: Gordon Pearlman, Clayton R. Peterson