Patents by Inventor Derrick W. Or

Derrick W. Or 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).

  • Dynamic timing of rotating or reciprocating machine parts
    Patent number: 4373806
    Abstract: The position of a reciprocating or rotating part of a machine is identified at a required point in the machine cycle by dividing the machine cycle into numbered notional segments and viewing the part by a stroboscope flash at a preselected numbered segment. The preselected numbered segment is identified by counting the segments through the machine cycle and comparing the count with a present count number on another counter.
    Type: Grant
    Filed: August 26, 1980
    Date of Patent: February 15, 1983
    Assignee: Imperial Group Limited
    Inventor: Derrick W. Tipper
  • Separation apparatus
    Patent number: 4300926
    Abstract: A duct increasing in cross-sectional area is provided with a screen means on its upper wall. An adjustable baffle is hingedly fixed to the lower wall of the duct at the inlet. Air-borne material carried in an air stream introduced at the inlet is separated from the stream by projection against the screen. The adjustable baffle directs the air-borne material onto the screen.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: November 17, 1981
    Inventor: Derrick W. Brooks