Having Horizontally Maintained Seat Patents (Class 472/111)
  • Patent number: 9534592
    Abstract: An actuator includes a first part having a magnetomotive element and configured to absorb heat up to at least a first temperature; a second part arranged so as to face the first part; a temperature-sensitive magnetic body provided between the first part and the second part and configured to move between a first position for contact with the first part and a second position for contact with the second part, the temperature-sensitive magnetic body having a Curie point lower than the first temperature and higher than a temperature of the second part; and a restoring part configured to restore the temperature-sensitive magnetic body from the first position to the second position.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: January 3, 2017
    Inventors: Osamu Tsuboi, Yoshihiro Mizuno, Norinao Kouma
  • Patent number: 7220184
    Abstract: A seesaw includes a manually rotatable actuator for adjusting the balance of the seesaw to accommodate a weight differential between two riders. After adjusting the seesaw, the actuator automatically locks the adjustment mechanism in place. A rack-and-pinion assembly provides fine adjustment, and a protective cover avoids creating a pinching hazard.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: May 22, 2007
    Inventor: Charles A. Akers
  • Patent number: 6712709
    Abstract: A playground apparatus having at least one support base for stabilizing the apparatus. A plurality of pockets are formed within the support base. The playground apparatus also includes at least one side member disposed within the pockets. A plurality of fasteners secure the side members disposed within the pocket to the support base to form the playground apparatus.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: March 30, 2004
    Assignee: The Little Tikes Company
    Inventors: Gregg A. Henderson, Andrew B. Logar
  • Patent number: 5951406
    Abstract: The seesaw device is adjustable as to the lengths of the moment arms on the beam, of the two seats. Children can adjust the moment-arm length of their own seat in order to compensate for weight imbalances between them. A visible display scale informs of the child of the current moment arm setting.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: September 14, 1999
    Inventor: Douglas A Steane
  • Patent number: 5522773
    Abstract: A rocking device for use as a toy incorporating several safety features to prevent the device from tipping over and the riders from falling off their seats or otherwise sustaining injuries during use. The rocking device includes a pair of substantially parallel siderails each having an upper portion and a curved lower portion. At least one horizontal member connects the pair of siderails. A pair of seats pivot from points on the upper portions of the siderails and remain substantially parallel to the ground during rocking of the pair of siderails.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: June 4, 1996
    Inventor: Rolland W. Rich