Patents by Inventor Donald K. Mitchell

Donald K. Mitchell 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).

  • Jib sail system
    Patent number: 3948200
    Abstract: In the jib sail system disclosed herein, the luff edge of a jib is provided with a bead of relatively small diameter backed up by a rib of relatively large diameter. In operation, the small bead is retained in a grooved headstay member while the larger diameter rib is operated on by a guide, during the introduction of the bead into the supporting groove, but remains outside the groove after passing through the guide.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: April 6, 1976
    Assignee: Hood Sailmakers, Inc.
    Inventors: Frederick E. Hood, Donald K. Mitchell, Bruce H. Walton
  • Sail-raising system
    Patent number: 3938460
    Abstract: In a jib sail system, roller-furling and interchangeability of jibs is provided by utilizing a rotatable, slotted stay member, preferably aerodynamically shaped, and by providing at the top of the stay member a ratchet-latching mechanism so that tension on the jib halyard can be released thereby facilitating a swivel coupling attachment of the halyard to the head of the jib.
    Type: Grant
    Filed: March 4, 1974
    Date of Patent: February 17, 1976
    Assignee: Hood Sailmakers, Inc.
    Inventors: Walter M. Wales, Donald K. Mitchell, Kenneth C. Smalley