Patents by Inventor Istvan Sandor

Istvan Sandor 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).

  • Patent number: 5642756
    Abstract: A valve manifold assembly for processing fluids wherein the manifold member includes respective interface segments to which are secured the valve members. The interface segments typically are counterbored into the faces of the manifold member and include portals connected to passageways internal to the manifold member; and an alignment device such as a pin. The valve member includes a manifold mount body portion which has a complementing alignment member such as an opening. The valve when posited in the counterbored portion, and the pin is aligned with the alignment opening in the manifold mount body portion ensures that the ports in the valve member and the manifold member are properly aligned. A manifold mount body portion of the valve includes an annular groove which coacts with a clamping device to secure the valve in the respective counterbored portion. A sealing gasket surrounds the aligned ports to insure that no fluid leakage occurs between the ports.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: July 1, 1997
    Assignee: Bio-Chem Valve Inc.
    Inventors: John Lawrence, Istvan Sandor
  • Patent number: 4524802
    Abstract: A novel improved pinch valve for controlling the flow of fluids in an unrestricted manner in, at least, two flexible tubes, including a housing for holding a solenoid coil between its outer wall and inner cylindrical core member. The solenoid armature is a truncated cone shape which coacts with a similarly shaped opening at the end of the inner cylindrical core member to optimize the flux path of the solenoid and thus its efficiency. A tube retention member includes openings for holding the flexible tubes. A further opening in the tube retention member holds a plunger member which is captured by a retaining pin. The plunger member is secured to the solenoid armature prior to assembly of the tube retention member to the solenoid housing. The plunger member moves with the armature as the solenoid is energized and deenergized. When the solenoid is unenergized, one of the flexible tubes is compressed between a knife like edge on the plunger member and a body portion of other tube retention member.
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: June 25, 1985
    Assignee: Bio-Chem Valve Corp.
    Inventors: John N. Lawrence, Istvan Sandor