Patents by Inventor Chia-Bo Chang

Chia-Bo 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: 6805151
    Abstract: A faucet includes two valve seats back-to-back, and a ceramic control valve assembled with an assembly slot of the two valve seats. The assembly slot is provided on a central horizontal line thereof with a cold water guide bole and a hot water guide hole, and on a central vertical line thereof with an upper discharging hole and a lower discharging hole. A base of the ceramic control valve is provided on a central horizontal line thereof with a cold water admission hole, and a hot water admission hole. The base is further provided with a water discharging hole which is located across a central vertical line of the base such that the water discharging hole is opposite in location to the lower discharging hole of the assembly slot. The base is provided with a water stopping surface located on the central vertical line of the base.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: October 19, 2004
    Inventor: Chia-Bo Chang
  • Patent number: 6640357
    Abstract: A water faucet structure includes a first valve seat mounted in one side of a wall, a first ceramic control valve fastened to the first valve seat, a second valve seat mounted in other side of the wall in a back-to-back manner in relation to the first valve seat, and a second ceramic control valve fastened to the second valve seat. The first and the second ceramic control valves each have a bottom seat which is provided with a cold water inlet, a hot water inlet, and a water outlet. The water inlets and the water outlets of the first and the second ceramic control valves are arranged in a mirror image pattern.
    Type: Grant
    Filed: December 22, 2002
    Date of Patent: November 4, 2003
    Assignee: Hain Yo Enterprises Co., Ltd.
    Inventor: Chia-Bo Chang
  • Patent number: 6439581
    Abstract: An improved sealing structure for a mixing valve of hot and cool water is disclosed. A first trench with an approximate V shape is formed on the upper surface of the lower wall along the peripheral rim of the water inlets and water outlet and is retained with a proper distance with the peripheral rim of the water inlets and water outlet. A second trench with an approximate inverse V shape is formed on the bottom surface along the peripheral rim of the water inlets and water outlet and is retained with a proper distance with the peripheral rim of the water inlets and water outlet. The shape of the first trench is completely symmetric to the second trench on the lower wall of the casing. A sealing ring is installed between the surface of the lower wall of the casing and the bottom surface of the fixing disk and has a symmetric shape with respect to the aforesaid trenches. Thus, the sealing ring can be engaged with the two trenches.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: August 27, 2002
    Inventor: Chia-Bo Chang
  • Patent number: 6170523
    Abstract: A water temperature regulating valve for limiting the maximum temperature of the water output. A temperature limiting cap is installed above the cartridge of the regulating valve. The limiting cap restricts the rotation of a control rod device pivotally installed in the barrel portion of the valve. When the limiting temperature is to be reset, the user removes the cap, rotates it to the desired position, and reinstalls the cap.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: January 9, 2001
    Inventor: Chia-Bo Chang
  • Patent number: 6131600
    Abstract: An improved structure of the cold and hot water mixing valve of a balance valve is disclosed. Sealing trenches are installed on the upper surface of the concave portion on the lower wall of the mixing valve gate body and the lower surface of the balance valve cover plate along the water through holes and with a proper distance to the periphery of the upper and lower seats of the balance valve. A balance valve sealing is placed between the two sealing trenches. Sealing trenches are installed on upper surface of the balance valve cover plate and the lower surface of a fixing disk with a proper distance along the periphery of the water through holes. The depths of the sealing trenches are slightly smaller the radii of the cross section of the sealing ring strip for sealing. Therefore, the sealing can be assembled easily. After assembling, the sealing ring strip is positioned steadily. A preferred sealing effect can be derived easily.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: October 17, 2000
    Inventor: Chia-Bo Chang
  • Patent number: 6029687
    Abstract: An assembling structure for balance valve of cold/hot water mixing valve. The assembling structure includes a mixing valve cartridge a bottom wall of which is formed with a lower balance valve cavity above the cold and hot water incoming holes thereof, and a circular balance valve cover board formed with cold and hot water incoming holes and mixing water outgoing hole corresponding to the water holes of the cartridge. A lower surface of the balance valve cover board is formed with an upper balance valve cavity at the cold and hot water incoming holes thereof. The lower surface of the balance valve cover board is further formed with a sealing groove along the edges of the mixing water outgoing hole and the upper balance valve cavity. When the balance valve cover board is fixedly rested on the upper surface of the bottom wall of the cartridge, the cover board via a balance valve seal is sealedly positioned in the sealing groove and pressed by the bottom wall of the cartridge.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: February 29, 2000
    Inventor: Chia-Bo Chang
  • Patent number: 6009893
    Abstract: An assembling structure for balance valve of cold/hot water mixing valve, which includes a balance valve shade board for assembling a water pressure balance valve with the bottom of the mixing valve. A lower surface of the bottom wall of the mixing valve cartridge is formed with an upper balance valve cavity near the cold and hot water incoming holes. Two sides of the bottom wall of the cartridge are formed with latch holes. The balance valve shade board are also formed with a cold and a hot water incoming holes and a mixing water outgoing hole. An upper surface of the balance valve shade board is formed with a lower balance valve cavity near the cold and hot water incoming holes. The upper surface of the balance valve shade board is further formed with a sealing groove along the edges of the mixing water outgoing hole and the lower balance valve cavity. Two sides of the edge of the shade board are disposed with upward extending resilient latch hooks.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: January 4, 2000
    Inventor: Chia-Bo Chang
  • Patent number: 5983918
    Abstract: A balancing valve assembly of a cold and hot water mixing valve including a mixing valve casing having a bottom wall provided with a depression for receiving a balancing valve cover plate. Cold and hot water inlets are provided in the depression, and a balancing valve lower cavity is disposed above the cold and hot water inlets. A balancing valve upper cavity is provided below cold and hot water inlets on the balancing valve cover plate. A washer is disposed between the mixing valve casing and the balancing valve cover plate when coupled so that the balancing valve lower cavity of the casing and the balancing valve upper cavity of the balancing valve cover plate together form a leakage-free space in which a balancing valve body may be secured, thus achieving a structure that is simple and quick to assemble and remains secured alter assembly.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: November 16, 1999
    Inventor: Chia-Bo Chang
  • Patent number: 5967184
    Abstract: A water temperature and flow rate control device, including a casing, a rotary cap mounted on the casing to control the horizontal turning angle and vertical tilting angle of a control lever in regulating the temperature of output volume of mixed hot and cold water, and a wedge block adjustably fastened to the control lever and adapted for adjusting the tilting angle of the control lever.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: October 19, 1999
    Inventor: Chia-Bo Chang
  • Patent number: 5857489
    Abstract: A control unit for a hot and cold water mixer that includes one cartridge, one movable disc, one fixed disc, and one valve seat. Within the structure, the first and second openings and the third shell shape opening of the fixed disc will provide the maximum area of water flow in conjunction with the enlarged area of the mixing chamber of the movable disc. The unit will increase the water flow of the valve and will facilitate the transporting capability of a more uniform temperature water. In addition, the cartridge structure may, for any purposes, assemble various connecting pipe lengths or specifications to the valve seat and may form the desired specification as well as reduces the production cost of cartridge molds.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: January 12, 1999
    Inventor: Chia-Bo Chang