Patents by Inventor David John Gretka, II

David John Gretka, II 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).

  • Pressure relief valve assembly
    Patent number: 11959556
    Abstract: A gas pressure relief valve assembly with a normally closed check valve received in a main body. An actuator pin slidably received in a guide body threadably carried by the main body may be advanced to open the check valve and retracted to permit the check valve to close. A knob connected to the actuator pin and threadably carried by the guide body may be manually rotated in opposite directions to advance and retract the actuator pin. Rotary loosening of the threaded knob and/or loosening of the threaded guide body will retract the actuator pin and prevent opening of the check valve.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: April 16, 2024
    Assignee: DADCO, Inc.
    Inventor: David John Gretka, II
  • PRESSURE RELIVE VALVE ASSEMBLY
    Publication number: 20210018106
    Abstract: A gas pressure relief valve assembly with a normally closed check valve received in a main body. An actuator pin slidably received in a guide body threadably carried by the main body may be advanced to open the check valve and retracted to permit the check valve to close. A knob connected to the actuator pin and threadably carried by the guide body may be manually rotated in opposite directions to advance and retract the actuator pin. Rotary loosening of the threaded knob and/or loosening of the threaded guide body will retract the actuator pin and prevent opening of the check valve.
    Type: Application
    Filed: April 11, 2019
    Publication date: January 21, 2021
    Inventor: David John Gretka, II