Patents by Inventor David J. Abrahamian

David J. Abrahamian 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).

  • Hydrogen centrifugal compressor
    Patent number: 11401947
    Abstract: The present disclosure relates to multistage centrifugal high purity hydrogen compressors for compressing low molecular weight fluids. More particularly, the present disclosure relates to the multistage high purity centrifugal hydrogen compressors wherein each stage comprises an vaned diffuser having at least two rows of a plurality of blades.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: August 2, 2022
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Ahmed F. Abdelwahab, David J. Abrahamian, Carl L. Schwarz, Kang Xu
  • HYDROGEN CENTRIFUGAL COMPRESSOR
    Publication number: 20220136525
    Abstract: The present disclosure relates to multistage centrifugal high purity hydrogen compressors for compressing low molecular weight fluids. More particularly, the present disclosure relates to the multistage high purity centrifugal hydrogen compressors wherein each stage comprises an vaned diffuser having at least two rows of a plurality of blades.
    Type: Application
    Filed: October 30, 2020
    Publication date: May 5, 2022
    Inventors: Ahmed F. Abdelwahab, David J. Abrahamian, Carl L. Schwarz, Kang Xu
  • Fin and tube heat exchanger
    Patent number: 10415894
    Abstract: In accordance with certain embodiments, a cooler for multiple tube banks features a series of parallel and planar fins that have upstream louvers to direct incoming air through a fin near a first row of tubes and a downstream set of louvers near an adjacent tube row to direct air back through the same fin before the air exits. By way of example, the upstream louvers have the negative slope of the downstream louvers and a constant angle from louver to louver within a bank. A constant length in a section view may be provided.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: September 17, 2019
    Assignee: Ingersoll-Rand Company
    Inventors: David J. Abrahamian, Kevin M. Conroy
  • Adjustable bearing
    Patent number: 7275872
    Abstract: A bearing that can be reoriented to move its center is disclosed. The center of the bearing is offset from the center of its outer housing. Should the shaft extending through the bearing need to be raised or lowered the outer housing is simply rotated in its receptacle and its position is fixed. Reconfiguring the bearing receptacle or using shims is eliminated and the alignment process is rendered shorter and more reliable future operation is obtained.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: October 2, 2007
    Assignee: Cameron International Corporation
    Inventor: David J. Abrahamian
  • Folding mirror
    Patent number: D552851
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: October 16, 2007
    Inventor: David J. Abrahamian