Patents by Inventor Hans C. Jensen

Hans C. Jensen 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).

  • Apparatus and method for controlling access to stored keys
    Patent number: 7021095
    Abstract: A system and apparatus for controlling keys or other objects is provided. The key can only be removed when an access control key identifying the individual who is removing the key is inserted. The access control key cannot be removed until the key is returned.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: April 4, 2006
    Inventor: Hans C. Jensen
  • Pneumatically-cushioned chair
    Patent number: 5433506
    Abstract: Prior pneumatically-cushioned chairs require over-inflation of the cushions to maintain a neat appearance for the chair when it is unoccupied. A chair is described having an array of pneumatically-inflated cushions each having an air storage reservoir which is biassed to force air into the cushions when the chair is unoccupied, providing a neat firm appearance, but to allow the volume of air in the cushions to be gradually reduced when placed under load to provide a gentler support.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: July 18, 1995
    Inventor: Hans C. Jensen
  • Reclining chair
    Patent number: 5335972
    Abstract: A reclining chair has hinged back and seat portions. The back portion is supported on a first leg having a cam-shaped floor-engaging surface which rocks in relation to the floor but does not slide. The seat portion is supported on a wheeled leg which rolls over the floor toward and away from the first leg. Adjustment from a reclining to an upright position is simply achieved through movement of the user's weight. A control mechanism allows the user to release the seat and back for adjustment or fix the chair in a given orientation.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: August 9, 1994
    Inventor: Hans C. Jensen
  • Cross-country skiing simulator
    Patent number: 4867443
    Abstract: An exercise machine for simulating cross-country skiing is disclosed in which the poling action of the arms and the leg action both drive the same flywheel through a system of overrunning clutches. This provides a more realistic simulation of cross-country skiing than the prior art devices in which the arm motion was independent of the leg action.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: September 19, 1989
    Assignee: Altero Technologies, Inc.
    Inventor: Hans C. Jensen