Patents by Inventor Donald Angus MacKenzie

Donald Angus MacKenzie 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).

  • Reversible braking mechanism
    Patent number: 5992580
    Abstract: A reversible braking mechanism is described, wherein a female member (5) receives a male member (3). One member (3, 5) carries a pair of bushes (19, 31) and the other member (3, 5) carries a pair of uni-directional roller bearings (21, 39) which engage the pair of bushes (19, 31). The uni-directional roller bearings (21, 39) are arranged in opposing directions, and a bush braking device (17) is selectively engageable with either of the bushes (19, 31).
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: November 30, 1999
    Assignee: Deveron Tackle Limited
    Inventor: Donald Angus MacKenzie