Patents by Inventor Amnon F. Vadasz

Amnon F. Vadasz 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).

  • Check valve
    Patent number: 4662392
    Abstract: In a subsurface positive displacement pump used in the petroleum industry for pumping crudes characterized by a high degree of suspended solid particles, a ball check valve comprising a valve ball and a valve seat assembly wherein the valve seat assembly comprises a hollow cylindrical body defining an orifice through which pumped fluid passes, the hollow cylindrical body being provided with a recess on the surface facing the valve ball in the region defining the orifice wherein an insert which forms the actual valve seat for the ball valve is secured in the recess. The insert is formed of a material having a hardness greater than the hardness of the material from which the cylindrical body is formed and the material from which the valve ball is formed is characterized by a high resiliency, a modulus of elasticity of between 0.1.times.10.sup.6 psi to 15.times.10.sup.6 psi and a hardness greater than that of the hollow cylindrical body.
    Type: Grant
    Filed: May 1, 1986
    Date of Patent: May 5, 1987
    Assignees: Intevep, S.A., Vereinigte Edelstahlwerke A.G., Oficina Tecnica HGB
    Inventor: Amnon F. Vadasz
  • Pump
    Patent number: 4516479
    Abstract: A pump for pumping fluids which contain a high degree of suspended solid particles comprises a piston provided with a cylindrical sleeve of a hard ceramic material having a hardness of greater than nine on the Mho scale, preferably an aluminum oxide ceramic or a zirconium nitrate ceramic, and a cylinder provided with a cylindrical sleeve of like ceramic material.
    Type: Grant
    Filed: June 6, 1983
    Date of Patent: May 14, 1985
    Assignee: Intevep, S.A.
    Inventor: Amnon F. Vadasz
  • Check valve
    Patent number: 4513778
    Abstract: In a subsurface positive displacement pump used in the petroleum industry for pumping crudes characterized by a high degree of suspended solid particles, a ball check valve comprising a valve ball and a valve seat assembly wherein the valve seat assembly comprises a hollow cylindrical body defining an orifice through which pumped fluid passes, the hollow cylindrical body being provided with a recess on the surface facing the valve ball in the region defining the orifice wherein an insert which forms the actual valve seat for the ball valve is secured in the recess. The insert is formed of a material having a hardness greater than the hardness of the material from which the valve ball is formed which material in turn is characterized by a hardness greater than that of the hollow cylindrical body.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: April 30, 1985
    Assignees: Intevep, S.A., Vereinigte Edelstahlwerke A.G., Oficina Technica HGB
    Inventor: Amnon F. Vadasz