Patents by Inventor ANDREW VASSALLO

ANDREW VASSALLO 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).

  • Modified Vacuum Actuated Valve Assembly and Sealing Mechanism for Improved Flow Stability for Fluids Sub-Atmospherically Dispensed from Storage and Delivery Systems
    Publication number: 20180163875
    Abstract: A modified vacuum actuated valve assembly and sealing mechanism is provided for improved sub-atmospheric flow stability characterized by the absence of delivery pressure spikes and flow excursions. The valve assembly includes a non-stationary thermoplastic seat and a stabber. The stabber is characterized by a top portion having a circular periphery designed to mechanically engage and disengage with an inner sealing surface of the thermoplastic seat. The sealing surface is coined to eliminate surface irregularities contained therein, thereby producing a relatively smooth coined mating inner sealing surface for the circular top portion of the stabber. The valve assembly also includes a modified bellows capable of fine tuning the delivery pressure of the valve assembly.
    Type: Application
    Filed: January 24, 2018
    Publication date: June 14, 2018
    Inventors: Douglas C. Heiderman, Ashwini K. Sinha, Paul Crvelin, Andrew Vassallo
  • Modified vacuum actuated valve assembly and sealing mechanism for improved flow stability for fluids sub-atmospherically dispensed from storage and delivery systems
    Patent number: 9909670
    Abstract: A modified vacuum actuated valve assembly and sealing mechanism is provided for improved sub-atmospheric flow stability characterized by the absence of delivery pressure spikes and flow excursions. The valve assembly includes a non-stationary thermoplastic seat and a stabber. The stabber is characterized by a top portion having a circular periphery designed to mechanically engage and disengage with an inner sealing surface of the thermoplastic seat. The sealing surface is coined to eliminate surface irregularities contained therein, thereby producing a relatively smooth coined mating inner sealing surface for the circular top portion of the stabber. The valve assembly also includes a modified bellows capable of fine tuning the delivery pressure of the valve assembly.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: March 6, 2018
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Douglas C. Heiderman, Ashwini K. Sinha, Paul Crvelin, Andrew Vassallo
  • MODIFIED VACUUM ACTUATED VALVE ASSEMBLY AND SEALING MECHANISM FOR IMPROVED FLOW STABILITY FOR FLUIDS SUB-ATMOSPHERICALLY DISPENSED FROM STORAGE AND DELIVERY SYSTEMS
    Publication number: 20160258537
    Abstract: A modified vacuum actuated valve assembly and sealing mechanism is provided for improved sub-atmospheric flow stability characterized by the absence of delivery pressure spikes and flow excursions. The valve assembly includes a non-stationary thermoplastic seat and a stabber. The stabber is characterized by a top portion having a circular periphery designed to mechanically engage and disengage with an inner sealing surface of the thermoplastic seat. The sealing surface is coined to eliminate surface irregularities contained therein, thereby producing a relatively smooth coined mating inner sealing surface for the circular top portion of the stabber. The valve assembly also includes a modified bellows capable of fine tuning the delivery pressure of the valve assembly.
    Type: Application
    Filed: March 4, 2015
    Publication date: September 8, 2016
    Inventors: DOUGLAS C. HEIDERMAN, ASHWINI K. SINHA, PAUL CRVELIN, ANDREW VASSALLO