Patents by Inventor John Kohlhauff

John Kohlhauff 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).

  • Synchronously driven, multiple cable boat lift
    Patent number: 6640736
    Abstract: A synchronously driven, multiple cable boat lift is used in combination with proximal and distal support structures located on respective sides of a boat to selectively lift and lower the boat out of and into a body of water. The boat lift includes a motor mountable on the proximal support structure and being selectively driven in opposing first and second directions. A boat accommodating platform is located between the proximal and distal support structures and includes a pair of interconnected cradle beams for extending transversely beneath the boat from the first side to the second side of the boat. Each beam has a proximal portion and a distal portion positionable on the first and second sides of the boat respectively.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: November 4, 2003
    Assignee: Quality Boat Lifts, Inc.
    Inventors: Shawn M. McLaughlin, Daniel S. Carter, Charles L. Sargent, John Kohlhauff
  • Synchronously driven, multiple cable boat lift
    Patent number: 6408776
    Abstract: A synchronously driven, multiple cable boat lift is used in combination with proximal and distal support structures located on respective sides of a boat to selectively lift and lower the boat out of and into a body of water. The boat lift includes a motor mountable on the proximal support structure and being selectively driven in opposing first and second directions. A boat accommodating platform is located between the proximal and distal support structures and includes a pair of interconnected cradle beams for extending transversely beneath the boat from the first side to the second side of the boat. Each beam has a proximal portion and a distal portion positionable on the first and second sides of the boat respectively.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: June 25, 2002
    Assignee: Quality Boat Lifts, Inc.
    Inventors: Shawn M. McLaughlin, Daniel S. Carter, Charles L. Sargent, John Kohlhauff
  • Single motor boat lift having horizontally and longitudinally driven cables
    Patent number: 6230639
    Abstract: A single motor, multiple cable boat lift is employed. The lift includes a platform and a pair of pilings disposed on each of the opposing sides of the platform. A first pair of cables innerconnect one side of the platform with the first pair of pilings and second pair of cables innerconnect the opposite side of the platform with the second pair of pilings. There is a single motor and a cable transmission apparatus that operably innerconnects the motor and all cables such that operation of the motor selectively retracts and extends the cables in a synchronized manner to raise and lower the lift platform.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: May 15, 2001
    Assignee: Quality Boat Lifts, Inc.
    Inventors: Shawn M. McLaughlin, Daniel S. Carter, Charles L. Sargent, John Kohlhauff