Patents by Inventor Edward C. Cranston

Edward C. Cranston 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).

  • Hook with pneumatic control circuit safety relief
    Patent number: 11434110
    Abstract: A load lifting hook assembly includes a body, a hook coupled to the body, a fluid connection on the body and connectable to a pressurized fluid source, a piston and a pressure relief valve. The piston is extendable from the body to engage the hook and lock the hook in a closed position relative to the body. The piston is configured to receive pressurized fluid from the fluid connection tending to urge the piston out of engagement with the hook. The pressure relief valve is positioned in the body in communication with the fluid connection and configured to prevent excess pressure in the pressurized fluid from acting on the piston.
    Type: Grant
    Filed: February 2, 2021
    Date of Patent: September 6, 2022
    Assignee: Cranston Diversified Industries, Inc.
    Inventor: Edward C. Cranston
  • HOOK WITH PNEUMATIC CONTROL CIRCUIT SAFETY RELIEF
    Publication number: 20210253401
    Abstract: A load lifting hook assembly includes a body, a hook coupled to the body, a fluid connection on the body and connectable to a pressurized fluid source, a piston and a pressure relief valve. The piston is extendable from the body to engage the hook and lock the hook in a closed position relative to the body. The piston is configured to receive pressurized fluid from the fluid connection tending to urge the piston out of engagement with the hook. The pressure relief valve is positioned in the body in communication with the fluid connection and configured to prevent excess pressure in the pressurized fluid from acting on the piston.
    Type: Application
    Filed: February 2, 2021
    Publication date: August 19, 2021
    Applicant: Cranston Diversified Industries, Inc.
    Inventor: Edward C. Cranston