Patents by Inventor Patrick J. Colby

Patrick J. Colby 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).

  • Apparatus and method for determining the air entrainment characteristics of liquids
    Patent number: 5965805
    Abstract: Described is an apparatus and a method to accurately determine the gas entrainment characteristics of liquids, such as automatic transmission fluids. The apparatus comprises a liquid reservoir, a conduit having an inlet and an outlet connected to the liquid reservoir so as to form a pressurized recirculating loop for the liquid in the liquid reservoir, a pump for moving the liquid through the conduit, and a means for admitting gas (such as air) into the conduit to aerate the liquid.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: October 12, 1999
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Raymond F. Watts, Manoj Tandon, Patrick J. Colby
  • Clutch friction test for motorcycle lubricants
    Patent number: 5932790
    Abstract: A modified SAE No. 2 friction machine is used to evaluate the clutch friction properties of motorcycle lubricants in a process comprising measuring the torque after a break-in period at three temperature points within the ranges 30.degree.-60.degree. C., 70.degree.-90.degree. C. and 110.degree.-150.degree. C. over a 10 second period while the speed of the motor driving the clutch plates varies from 0-300 rpm and the clutch plate pressure is held at 50 psi.
    Type: Grant
    Filed: March 4, 1998
    Date of Patent: August 3, 1999
    Assignee: Exxon Chemical Patents Inc
    Inventors: Charles F. Hoffman, Emil J. Meny, Patrick J. Colby, Roger K. Nibert