Patents by Inventor Anders Lindecrantz

Anders Lindecrantz 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).

  • Foldable propeller
    Patent number: 4242049
    Abstract: A foldable boat propeller comprising a hub to which the propeller blades are pivotally connected and which has two mutually turnable portions, one of which is fixedly secured to the propeller shaft and has a cam surface whereas the other one carries the propeller blades, and an axially shiftable plunger member which is mechanically connected to the propeller blades and unfolds them to working position on relative turning of the hub portions and axial shifting of said plunger means in response thereto only when the propeller shaft is driven in the reverse propulsion direction. Said plunger means is released for blade unfolding by centrifugal and water thrust force when the propeller shaft is driven in the forward propulsion direction.
    Type: Grant
    Filed: February 6, 1979
    Date of Patent: December 30, 1980
    Assignee: Hasselfors Stainless AB
    Inventors: Hans Forsling, Anders Lindecrantz