Patents by Inventor Abir R. Das

Abir R. Das 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).

  • Hydraulic Gerotor pump for automatic transmission
    Patent number: 11614158
    Abstract: A hydraulic gerotor pump for an automatic transmission may comprise a housing and a gear set rotatably disposed within the housing. The gear set may comprise an inner gear and an outer gear having radially opposed intermeshing teeth that together define a plurality of circumferentially disposed variable volume pumping chambers therebetween. The housing may be made of a first aluminum-based material, and the inner gear and the outer gear of the gear set may be made of a second aluminum-based material. The linear coefficient of thermal expansion of the first aluminum-based material may be substantially the same as that of the second aluminum-based material.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: March 28, 2023
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Robert Parrish, Wenying Yang, Zhe Li, Abir R. Das, Chad M. Huls, Anil K. Sachdev
  • HYDRAULIC GEROTOR PUMP FOR AUTOMATIC TRANSMISSION
    Publication number: 20220010874
    Abstract: A hydraulic gerotor pump for an automatic transmission may comprise a housing and a gear set rotatably disposed within the housing. The gear set may comprise an inner gear and an outer gear having radially opposed intermeshing teeth that together define a plurality of circumferentially disposed variable volume pumping chambers therebetween. The housing may be made of a first aluminum-based material, and the inner gear and the outer gear of the gear set may be made of a second aluminum-based material. The linear coefficient of thermal expansion of the first aluminum-based material may be substantially the same as that of the second aluminum-based material.
    Type: Application
    Filed: July 13, 2020
    Publication date: January 13, 2022
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Robert Parrish, Wenying Yang, Zhe Li, Abir R. Das, Chad M. Huls, Anil K. Sachdev