Patents by Inventor Tony Wei-Sin Chang

Tony Wei-Sin Chang 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: 7000624
    Abstract: A lighted umbrella comprises a solar power device mounted on the top end of the shaft of the umbrella. A plurality of ribs is pivotally connected to the shaft. Each rib has a hollow interior in which an electrical wire can be stored. A slot is formed on each rib to accommodate two transparent light guiding rods that are disposed on the slot to form an opening space near the middle of the rib. A plurality of lighting devices is affixed on the rods through the opening space. Energy efficient devices such as light emitting diodes are used as the lighting devices to save energy provided by the solar power device. A fabric supported by the ribs forms the shelter for the umbrella.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: February 21, 2006
    Inventor: Tony Wei-Sin Chang
  • Patent number: 6779838
    Abstract: A foldable chair includes a leg assembly and a reclining back connected together by a pair of joint assemblies. Each joint assembly includes a through hole for receiving a support member of the reclining back, and a through channel for accommodating a control device that adjusts the reclining angle. The control device comprises a spring member and an adjustment block to be engaged and disengaged with a saw-tooth member formed on the lower end of the support member. A control button is connected to a handle of the adjustment block. The reclining angle can be adjusted when the control button is pulled to disengage the adjustment block with the saw-tooth member. The control button may also be coupled with the handle using a coupling device. By having the coupling device, the control button can be pushed to disengage the adjustment block with the saw-tooth member.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: August 24, 2004
    Inventor: Tony Wei-Sin Chang
  • Publication number: 20040113476
    Abstract: A foldable chair includes a leg assembly and a reclining back connected together by a pair of joint assemblies. Each joint assembly includes a through hole for receiving a support member of the reclining back, and a through channel for accommodating a control device that adjusts the reclining angle. The control device comprises a spring member and an adjustment block to be engaged and disengaged with a saw-tooth member formed on the lower end of the support member. A control button is connected to a handle of the adjustment block. The reclining angle can be adjusted when the control button is pulled to disengage the adjustment block with the saw-tooth member. The control button may also be coupled with the handle using a coupling device. By having the coupling device, the control button can be pushed to disengage the adjustment block with the saw-tooth member.
    Type: Application
    Filed: December 5, 2003
    Publication date: June 17, 2004
    Inventor: Tony Wei-Sin Chang
  • Patent number: 6733070
    Abstract: A foldable chair includes a leg assembly and a reclining back connected together by a pair of joint assemblies. Each joint assembly includes a through hole for receiving a support member of the reclining back, and a through channel for accommodating a control device that adjusts the reclining angle. The control device comprises a spring member and an adjustment block to be engaged and disengaged with a saw-tooth member formed on the lower end of the support member. A control button is connected to a handle of the adjustment block. The reclining angle can be adjusted when the control button is pulled to disengage the adjustment block with the saw-tooth member. The control button may also be coupled with the handle using a coupling device. By having the coupling device, the control button can be pushed to disengage the adjustment block with the saw-tooth member.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: May 11, 2004
    Assignee: TWSC Corp.
    Inventor: Tony Wei-Sin Chang
  • Publication number: 20040007903
    Abstract: A foldable chair includes a leg assembly and a reclining back connected together by a pair of joint assemblies. Each joint assembly includes a through hole for receiving a support member of the reclining back, and a through channel for accommodating a control device that adjusts the reclining angle. The control device comprises a spring member and an adjustment block to be engaged and disengaged with a saw-tooth member formed on the lower end of the support member. A control button is connected to a handle of the adjustment block. The reclining angle can be adjusted when the control button is pulled to disengage the adjustment block with the saw-tooth member. The control button may also be coupled with the handle using a coupling device. By having the coupling device, the control button can be pushed to disengage the adjustment block with the saw-tooth member.
    Type: Application
    Filed: January 30, 2002
    Publication date: January 15, 2004
    Inventor: Tony Wei-Sin Chang
  • Patent number: 6536732
    Abstract: A swivel mechanism for foldable furniture includes two disks and a rotatable assembly sandwiched in between. Each disk has a plurality of through holes each for receiving an elongated metal tube and jointly connecting the tube to the disk. The through hole has a side wall with a slanted concave surface. A bridge member having one side with a slanted concave surface is formed across the through hole. When the metal tube is held in a slanted open position, the slanted concave surfaces of the side wall and the bridge member are engaged with the tube to provide strong support and restrain movement.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: March 25, 2003
    Inventor: Tony Wei-Sin Chang
  • Patent number: 5971474
    Abstract: A collapsible glider chair having stopping devices for stopping the motion of chair frames and stabilizing the chair. The glider chair comprises a seat-base frame, a back-support frame, a pair of armrests and a pair of link members pivotally connected. A pair of stopping devices are affixed onto the seat-base frame or link members to stop the movement of chair frames while one is standing up and pushing down the armrests. The stopping devices may be affixed near the armrests or the link members for blocking either the armrests or the link members. Anti-slippery devices are also mounted on both the seat-base frame and the back-support frame to increase the contact friction to a floor or ground and stabilize the chair.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: October 26, 1999
    Assignee: Variety Electronic Inc.
    Inventor: Tony Wei-Sin Chang
  • Patent number: 5893605
    Abstract: A foldable chair having a cup holder. The foldable chair comprises a leg assembly, a seat cloth, and a cup holder. The cup holder being a bag made of fabric or cloth is collapsible. By affixing the cup holder to the edge of the seat cloth, it provides a convenient place for holding a cup or a can. For a foldable chair having a pair of armrests, the cup holder can be integrated into the armrest through an opening formed on the armrest. A flap is provided to cover the opening.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: April 13, 1999
    Assignee: Variety Electronics Inc.
    Inventor: Tony Wei-Sin Chang
  • Patent number: 5730488
    Abstract: A folding chair having cylindrical devices for supporting the back-support part of the chair. The folding chair comprises a seat-base part having a seat cloth and two loop-shaped frames pivotedly connected to each other and two joint members each having two extended arms for hingedly connecting the back-support part to the seat-base part. The back-support part includes a back cloth and two supporting tubes. A cylindrical device having a concave surface with two slightly protruded edges on one end is plugged and locked into the bottom opening of each of said supporting tubes. The supporting tubes sit firmly on the upper sections of the frames of the seat-base part by means of matched surface curvature when the back-support part is hingedly opened.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: March 24, 1998
    Assignee: Variety International, Inc.
    Inventor: Tony Wei-Sin Chang