Patents by Inventor Arvind M. Singhal

Arvind M. Singhal 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).

  • Publication number: 20200246801
    Abstract: This disclosure relates to refiner plate segments having feeding grooves having a first width at a first end of the feeding groove, wherein the first end of the feeding groove is disposed closer to an inner diameter of the refiner plate segment, and a second end of the feeding groove having a second width, wherein the second end of the feeding groove is disposed closer to the outer diameter than the first end and wherein the second width is less than the first width. It is believed that the increased width of the feeding groove at the inner diameter, coupled with the change in angle or curve of the feed groove from a feeding angle to a holding angle such that the centrifugal force applied to the lignocellulosic material surpasses the plugging force, allows for improved hydraulic capacity over the refiner plate segment without reducing refining efficiency.
    Type: Application
    Filed: February 5, 2020
    Publication date: August 6, 2020
    Inventors: Arvind M. Singhal, Long Nguyen
  • Publication number: 20190376233
    Abstract: A refiner comprising two or more facing refining assemblies, wherein each refining assembly comprises a backing structure and refiner plate segments engaged to the backing structure, wherein a series of alternating bars and grooves defines a refining surface on each refiner plate segment, wherein the refiner plate segments of the first refining assembly have a terminal edge perimeter defined by two or more terminal edges of bars disposed closest to the outer arc of the substrate of the first refining assembly, wherein the refiner plate segments of the second refining assembly have an outermost edge circumference defined by an outermost terminal edge of a bar disposed closest to the outer arc of the substrate of the second refining assembly facing the first refining assembly, and wherein the terminal edge perimeter of the first refining assembly is not parallel to the outermost edge circumference of the second refining assembly.
    Type: Application
    Filed: May 15, 2019
    Publication date: December 12, 2019
    Inventors: Arvind M. Singhal, Peter Antensteiner