Patents by Inventor Chi-Chuan Hwan

Chi-Chuan Hwan 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: 5192008
    Abstract: A pulling mechanism of an adhesive-dispensing gun, comprising a gun barrel having a rear wall, a gun base, a trigger and a push rod, wherein a stopper plate is pivotably disposed in the gun base and formed with a hole through which the push rod extends, and wherein a push plate is disposed in the gun base and formed with a hole through which the push rod extends, a first and a second springs being fitted on the push rod on two sides of the stopper plate, one end of the first spring contacting the rear wall of the gun barrel for pushing the stopper plate, one end of the second spring being used to push the push plate, the lower end of the push plate being driven by the trigger to push the push rod forward, a torque spring being disposed on a pivot of the trigger to restore the trigger back to its home position and push the stopper plate out of the stopping position, whereby the push rod can be directly pulled back and once the trigger is released, the push rod is free from any pressure and no excessive adhesiv
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: March 9, 1993
    Assignee: Dai Shyun Enterprise Co., Ltd.
    Inventor: Chi-Chuan Hwan
  • Patent number: 4813574
    Abstract: A gun-shaped stuffing material dispenser which is particularly employed to apply stuff substance to crevices on walls or the places, such as the clefts along the four sides of a window frame at its mount. The present disclosure characteristically consists of an integrally formed gun body, to the front end of which is removably pivotably secured a ring support member, and a piston rod which is provided with a push plate pivotably attached to the front end thereof so to effect ready packing, transportation and fast production purpose.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: March 21, 1989
    Inventor: Chi-Chuan Hwan
  • Patent number: D382193
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: August 12, 1997
    Assignee: Top Union Lock Manufacturing Co., Ltd.
    Inventor: Chi-Chuan Hwan