Patents by Inventor Gregory C. Morrell

Gregory C. Morrell 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).

  • Thrust enhancing propeller guard assembly
    Publication number: 20030114052
    Abstract: A propeller guard assembly for watercraft that, in cooperation with a rotating propeller, creates a substantial increase in propulsive thrust and provides improved all around shielding of the latest state of the art propeller configurations such as wider propeller blades and contra rotating dual propeller systems.
    Type: Application
    Filed: November 4, 2002
    Publication date: June 19, 2003
    Inventors: William C. Schultz, Gregory C. Morrell
  • Thrust enhancing propeller guard assembly
    Patent number: 6475045
    Abstract: A propeller guard assembly for water craft that, in cooperation with a rotating propeller, creates a substantial increase in propulsive thrust and provides improved all around shielding of the latest state of the art propeller configurations. The increase in propulsive thrust of the propeller guard assembly of the invention is created primarily by the angle of the attack and hydrofoil cross section of the four guard rings or cowlings of the device. A secondary reason for the increase in propulsive thrust of the propeller guard assembly of the invention resides in the fact that the thrust realized is equal to the ratio between the effective projected propeller area and the area of trailing edges of the large primary and secondary guard rings which decreases the tendency of the propeller race to spread, particularly at high propeller slip during acceleration and take off.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: November 5, 2002
    Inventors: William C. Schultz, Gregory C. Morrell
  • Thrust enhancing propeller guard assembly
    Publication number: 20020094730
    Abstract: A propeller guard assembly for water craft that, in cooperation with a rotating propeller, creates a substantial increase in propulsive thrust and provides improved all around shielding of the latest state of the art propeller configurations. The increase in propulsive thrust of the propeller guard assembly of the invention is created primarily by the angle of the attack and hydrofoil cross section of the four guard rings or cowlings of the device. A secondary reason for the increase in propulsive thrust of the propeller guard assembly of the invention resides in the fact that the thrust realized is equal to the ratio between the effective projected propeller area and the area of trailing edges of the large primary and secondary guard rings which decreases the tendency of the propeller race to spread, particularly at high propeller slip during acceleration and take off.
    Type: Application
    Filed: January 18, 2001
    Publication date: July 18, 2002
    Inventors: William C. Schultz, Gregory C. Morrell