Patents by Inventor Chung-Hsin Liu

Chung-Hsin Liu 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: 6402243
    Abstract: A safety harness structure for a rocking chair. The structure includes a support frame and a chair mounting on the support frame through a pair of swinging bars. The swinging bars are pivotally engaged with two sides of the support frame and the chair through pivotal shafts located at the junctures of the support frame and the chair. The chair may swing to and fro relative to the frame about the pivotal shafts which function as fulcrums. The swinging bars are pivotally bridged by a restrictive rod for limiting the swinging angle of the swinging bars thereby to maintain the chair swinging within a selected displacement.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: June 11, 2002
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: 5992929
    Abstract: A folding collapsible rocking chair includes a chair, two side frame sets at two opposite lateral sides of the chair, and two rockers at the bottom side of the side frame sets, the chair, the side frame sets and the rockers being pivoted to one another so that the rocking chair can be folded up and collapsed when not in use.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: November 30, 1999
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: 5931530
    Abstract: A rocking chair comprising a chair seat, a base and a rocking mechanism connecting the chair seat and the base, the rocking mechanism being inserted in the shaft sleeve installed on the upper part of the base, so the chair seat may rotate as opposed to the base. The rocking mechanism will cause the chair seat to produce a front and rear rocking movement, and restrict its rocking dislocation.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: August 3, 1999
    Inventor: Lausan Chung Hsin Liu
  • Patent number: 5876289
    Abstract: A safety swing seat mounting structure includes a coupling mechanism mounted between a support frame and a swing seat, enabling the swing seat to be swung on the support frame, the coupling mechanism including a pivot pin mounted on the support frame and a coupling plate mounted on the swing seat and turned with the swing seat about the pivot pin, and a constraint mechanism which limits the swinging angle of the swing seat, the constraint mechanism including a transversely extended oblong constraint hole provided at the coupling plate, and a constraint rod fixedly mounted on the support frame and hooked in the constraint hole.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: March 2, 1999
    Inventor: Lausan Chung Hsin Liu
  • Patent number: 5727897
    Abstract: A rod member connector including a coupling hole and a coupling tube adapted for holding two rod members of a folding chair at right angles, and two outward flanges raised from the periphery of the coupling hole at one side opposite to the coupling tube and defining a mouth adapted for holding a third rod member of the folding chair to secure the folding chair in the collapsed condition.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: March 17, 1998
    Inventor: Lausan Chung Hsin Liu
  • Patent number: 5707105
    Abstract: A safety lock is pivotally secured to a back frame and a stand frame of a folding chair by a pivot pin to secure said folding chair in an extended position, the safety lock including a metal hook having a retaining notch adapted for hooking on a headed locating pin, and a rubber cap enclosing the hook and having a retaining notch adapted for hooking on the headed locating pin and an inside recess adapted for receiving the head of the headed locating pin.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: January 13, 1998
    Inventor: Lausan Chung Hsin Liu
  • Patent number: 5054848
    Abstract: Disclosed is a folding chair frame tube positioning device, which is comprised of a pivot device and a coupling buckle to releasably secure the back frame and the back stand of the chair together. The pivot device comprises a transverse axle secured to the lower end of the back frame at an outer side and two parallel plates vertically extending downward therefrom to pivotably bilaterally connect to the middle part of a back stand. The coupling buckle comprises a ring-shaped portion sleeved on the back stand, and an unitary side projection having a retaining notch on the bottom for engaging with the transverse axle of the pivot device.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: October 8, 1991
    Inventor: Chung-Hsin Liu
  • Patent number: D450194
    Type: Grant
    Filed: March 28, 2001
    Date of Patent: November 13, 2001
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D450469
    Type: Grant
    Filed: April 3, 2001
    Date of Patent: November 20, 2001
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D450938
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: November 27, 2001
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D450939
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: November 27, 2001
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D455567
    Type: Grant
    Filed: March 28, 2001
    Date of Patent: April 16, 2002
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D455908
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: April 23, 2002
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D456186
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: April 30, 2002
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D457019
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: May 14, 2002
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D457332
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: May 21, 2002
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D457339
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: May 21, 2002
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D459097
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: June 25, 2002
    Inventor: Lausan Chung-Hsin Liu
  • Patent number: D414947
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: October 12, 1999
    Inventor: Lausan Chung Hsin Liu
  • Patent number: D417561
    Type: Grant
    Filed: October 20, 1998
    Date of Patent: December 14, 1999
    Inventor: Lausan Chung Hsin Liu