Patents by Inventor Han-Chin Sun

Han-Chin Sun 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: 5921599
    Abstract: A spade consists of a blade and a handle. The blade has an elongated shank. The handle is composed of a fastening tube and a casing for covering the fastening tube. The fastening tube has an axial hole in which the shank of the blade is securely located. The fastening tube is provided in the outer wall thereof with a plurality of ribs for retaining the casing.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: July 13, 1999
    Inventor: Han-Chin Sun
  • Patent number: 5572858
    Abstract: A rake head mounting structure for fastening a rake head to a rake handle, including a top retaining strip attached to the top side of the rake head and having a series of through holes, a bottom retaining strip attached to the bottom side of the rake head and having a series of studs respectively fitted into the through holes on the top retaining strip and secured in place by screws, a locating device fastened to the rake head by a clamping plate and having a T-screw secured to a through hole on the rake handle by a wing nut for permitting the front end of the rake handle to be secured to one stud on the bottom retaining strip by a screw.
    Type: Grant
    Filed: July 11, 1995
    Date of Patent: November 12, 1996
    Inventor: Han-Chin Sun
  • Patent number: 5287688
    Abstract: The rake includes a flat rake body with a flared portion provided with a plurality of prongs and a head portion opposite to the flared portion. The flat rake body has a first slot formed adjacent to a free end thereof and a second slot which has a second length that is shorter than a first length of the first slot and which is spaced from the first slot in a parallel manner. The rake further includes a resilient fastening unit that has a first inverted U-shaped member with two legs, a second inverted U-shaped member that is smaller than the first U-shaped member and that has two legs, and a connecting rod which interconnects one of the legs of the first and second U-shaped members. Each of a remaining one of the legs of the first and second U-shaped members has an extension that extends toward one another and that defines cooperatively a clearance therebetween.
    Type: Grant
    Filed: February 26, 1993
    Date of Patent: February 22, 1994
    Inventor: Han-Chin Sun
  • Patent number: D350052
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: August 30, 1994
    Inventor: Han-Chin Sun
  • Patent number: D369073
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: April 23, 1996
    Inventor: Han-Chin Sun