Patents by Inventor Aleksandra M. Egelja

Aleksandra M. Egelja 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 system with a dynamic seal
    Patent number: 9651067
    Abstract: A system can include one or more valve arrangements with a working chamber to receive a working fluid at a first pressure, and a control chamber to receive fluid at a second pressure. A dynamic seal can be disposed on a land of a valve element. The valve arrangement may include a sleeve against which the dynamic seal is slidably engaged. The valve element may include a check stem. A pressure compensating system may be in communication with bores formed in with the valve element. A pressure system to monitor dynamic seal wear may be in communication with the control chamber of the valve arrangement.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: May 16, 2017
    Assignee: Caterpillar Inc.
    Inventors: Matthew J. Beschorner, Eric C. Hughes, Mikhail A. Sorokine, James A. Aardema, Thomas J. Hajek, Aleksandra M. Egelja
  • HYDRAULIC SYSTEM WITH A DYNAMIC SEAL
    Publication number: 20140034135
    Abstract: A system can include one or more valve arrangements with a working chamber to receive a working fluid at a first pressure, and a control chamber to receive fluid at a second pressure. A dynamic seal can be disposed on a land of a valve element. The valve arrangement may include a sleeve against which the dynamic seal is slidably engaged. The valve element may include a check stem. A pressure compensating system may be in communication with bores formed in with the valve element. A pressure system to monitor dynamic seal wear may be in communication with the control chamber of the valve arrangement.
    Type: Application
    Filed: July 22, 2013
    Publication date: February 6, 2014
    Applicant: Caterpillar Inc.
    Inventors: Matthew J. Beschorner, Eric C. Hughes, Mikhail A. Sorokine, James A. Aardema, Thomas J. Hajek, Aleksandra M. Egelja