Patents by Inventor Alan R. Eschbach

Alan R. Eschbach 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 shear rheometer and method
    Patent number: 5357783
    Abstract: An improvement in a rheometer and the method for measuring rheological properties of a viscoelastic test specimen at different temperatures, at which different temperatures the viscoelastic properties exhibit a relatively wide difference, wherein the test specimen is placed between and is coupled with opposed plates, one of the opposed plates is oscillated angularly relative the other of the opposed plates, and the angular displacement of one of the plates relative to the other of the plates and the torque associated with the relative angular displacement are measured within an optimum range of torque and angular displacement for determining the rheological properties, couples a first contact area on one of the opposed plates with the test specimen when the test specimen is at one of the different temperatures, and couples a second contact area on the one of the opposed plates with the test specimen when the test specimen is at another of the different temperatures, the first contact area being different from
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: October 25, 1994
    Assignee: Rheometrics, Inc.
    Inventor: Alan R. Eschbach
  • Dynamic shear rheometer and method
    Patent number: 5271266
    Abstract: An improvement in a rheometer and the method for measuring rheological properties of a viscoelastic test specimen at different temperatures, at which different temperatures the viscoelastic properties exhibit a relatively wide difference, wherein the test specimen is placed between and is coupled with opposed plates, one of the opposed plates is oscillated angularly relative the other of the opposed plates, and the angular displacement of one of the plates relative to the other of the plates and the torque associated with the relative angular displacement are measured within a predetermined optimum range of torque and angular displacement for determining the rheological properties, couples a first contact surface on one of the opposed plates with the test specimen to establish a first contact area between the one of the opposed plates and the test specimen when the test specimen is at one of the different temperatures, and couples a second contact surface on the one of the opposed plates with the test specime
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: December 21, 1993
    Assignee: Rheometrics, Inc.
    Inventor: Alan R. Eschbach