Patents by Inventor Andrew S. Cartwright

Andrew S. Cartwright 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).

  • Patent number: 4383830
    Abstract: A rowing boat 10 has a fixed seat 14 and a movable foot stretcher 16 slidably mounted in guides 15. A swinging outrigger arm 17 is provided to support an oar by means of row lock 22 at its outer end. The inner end of outrigger 17 is pivotally mounted on a vertical axis 21. A coupling link 24 connects the stretcher to the outrigger 17, whereby as the stretcher is moved fore-and-aft during rowing the outrigger 17 is pivoted about axis 21. The link 24 is connected to the outrigger 17 at a point which is adjustable, and is always inboard of the rowlock. In an alternative embodiment the outrigger 17 is provided with a lifting member 33 which assists in raising the blade of the oar.
    Type: Grant
    Filed: March 6, 1980
    Date of Patent: May 17, 1983
    Inventor: Andrew S. Cartwright