Patents by Inventor Ali M. Nasr

Ali M. Nasr 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).

  • Seal for pump having an internal gas pump
    Patent number: 5567132
    Abstract: Pump apparatus having a wear end and a pump end is provided with a seal-pump for preventing liquid being pumped from entering the wear end. An internal pump is positioned between the wear end and the pump end of sealless pumps to direct small quantities of gas from the wear end to the pump end at a pressure which prevents liquid in the pump end to pass into the wear end. A seal is provided on a stationary ring of the internal pump which prevents fluid being pumped from contacting working portions of the internal pump.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: October 22, 1996
    Assignee: Endura Pumps International, Inc.
    Inventors: Francis A. Dupuis, Ali M. Nasr
  • Pump having an internal gas pump
    Patent number: 5308229
    Abstract: Pump apparatus having a wear end and a pump end is provided with means for preventing liquid being pumped from entering the wear end. An internal pump is positioned between the wear end and the pump end of sealless pumps to direct small quantities of gas from the wear end to the pump end at a pressure which prevents liquid in the pump end to pass into the wear end.
    Type: Grant
    Filed: November 19, 1992
    Date of Patent: May 3, 1994
    Assignee: PMC Liquiflo Equipment Company
    Inventors: Francis A. DuPuis, Ali M. Nasr
  • Pump having an internal pump
    Patent number: 5288213
    Abstract: Pump apparatus having a wear end and a pump end is provided with means for preventing fluid being pumped from entering the wear end. An internal pump is positioned between the wear end and the pump end of sealless pumps to direct small quantities of fluid from the wear end to the pump end at a pressure which prevents fluid in the pump end to pass into the wear end.
    Type: Grant
    Filed: November 19, 1992
    Date of Patent: February 22, 1994
    Assignee: PMC Liquiflo Equipment Co., Inc.
    Inventor: Ali M. Nasr
  • Apparatus for detecting bearing shaft wear utilizing rotatable magnet means
    Patent number: 4924180
    Abstract: A device is provided for measuring bearing or shaft wear in an apparatus utilizing a rotating shaft positioned in a bearing. A plurality of magnets are mounted on the rotating shaft and at least three coils forming at least two pairs of coils are mounted on a stationary housing surrounding the shaft. Means are provided for measuring the change in induced voltage for each pair of coils independent of shaft rotation speed, ambient temperature, the flux density of the magnets and the concentricity of the bearing and shaft diameters.
    Type: Grant
    Filed: December 18, 1987
    Date of Patent: May 8, 1990
    Assignee: Liquiflo Equipment Company
    Inventors: Ali M. Nasr, Gregory W. Miller