Patents by Inventor Han-Ching Sun

Han-Ching 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: 5182899
    Abstract: A rake has a long handle and a projecting prong section. The prongs of the projecting prong section are held between an elongated upper clamping sheet and an elongated lower clamping sheet. A bolt extends through the fastener hole of the handle and the hole of the upper clamping sheet to engage in the threaded hole of the lower clamping sheet so as to fasten the lower end of the handle to the projecting prong section. A generally U-shaped retaining member has two ends which are bent inwardly so as to form a rectangular loop, thereby clamping the upper ends of the prongs in the retaining member. The upper plate portion of the retaining member is pressed to form a retaining hole in the upper end thereof. A generally Z-shaped connecting sheet has an upper plate portion fastened to the lower portion of the handle, a lower plate portion inserted into and confined within the retaining hole of the retaining member, and a connecting portion interconnecting the upper and lower plate portions.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: February 2, 1993
    Inventor: Han-Ching Sun
  • Patent number: 5177947
    Abstract: A rake has a handle shaft, and a fork portion including a flat head and a plurality of prongs. The flat head has a plurality of spaced longitudinally extending grooves and groove-confining ridges, and a plate member transversely extending over the groove-confining ridges. The plate member has a plurality of holes each of which is aligned to one of the grooves. A metal plate is attached to the plate member between the plate member and the groove-confining ridges. Each of the prongs has a first curved end, and a second end received in one of the grooves. The metal plate has a plurality of projections each of which is aligned with one of the holes and embeds into one of the prongs to prevent the prong from being released from the groove.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: January 12, 1993
    Inventor: Han-Ching Sun
  • Patent number: 5144791
    Abstract: A bamboo rake includes a long handle and a projecting prong section with two clamping sheets holding prongs therebetween. A connector apparatus connects detachably the handle to the projecting prong section and includes a small fastening plate secured to one of the clamping sheets, a large fastening plate secured to the upper end portion of the projecting prong section, a U-shaped small retaining piece mounted pivotally on the small fastening plate, a U-shaped large retaining piece mounted pivotally on the large fastening plate, and an elongated connecting plate connected rotatably to one of the small and large retaining pieces at an end portion thereof. The other end portion of the connecting plate is connected slidably to the other of the small and large retaining pieces. The truncately conical lower end portion of the handle is clamped between the small retaining piece and the small fastening plate and between the large retaining piece and the large fastening plate.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: September 8, 1992
    Inventor: Han-Ching Sun
  • Patent number: 4682464
    Abstract: The present invention is an improved rake which includes a drag portion having a plurality of prongs and a handle portion connecting to the drag portion by an engaging means which includes a clip member for clipping and a U-shaped member for holding the drag portion and the handle portion that can be used to connect the two portions integrally and firmly when the rake is in use and can be easily detached from each other by releasing the engaging means for convenience in transportation.
    Type: Grant
    Filed: January 21, 1986
    Date of Patent: July 28, 1987
    Inventor: Han-Ching Sun