Patents by Inventor Pao-Lu Chen

Pao-Lu Chen 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).

  • Publication number: 20120279538
    Abstract: A doorstop bar includes a retractable bar, a stopping element, and an urging element. The retractable bar is retractable to adjust the length thereof. The stopping element is provided at the top of the retractable. The stopping element has a holding part, and a hooking element so as to be hung on the doorknob of a door. The doorstop bar can function as a walking stick as well.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 8, 2012
    Applicant: Ching's Shen Enterprise Corp.
    Inventor: Pao-Lu Chen
  • Patent number: 7654293
    Abstract: A tree pruner includes a rod and a fixed part is fixed to the rod and an arm has a first end pivotably connected to the fixed part. A spring is connected between the fixed part and a second end of the arm. A movable part has an end fixed to the arm and a mediate portion of the movable part is pivotably connected to the fixed part. A positioning seat is movably positioned on the rod and a stationary pulley is connected to the positioning seat. A movable pulley is connected to the arm and a rope reeves through the stationary pulley and the movable pulley. When pulling the rope, the arm is pivoted to move the movable part toward the fixed part to prune branches when the arm is pivoted.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: February 2, 2010
    Inventor: Pao-Lu Chen
  • Publication number: 20090025828
    Abstract: A tree pruner includes a rod and a fixed part is fixed to the rod and an arm has a first end pivotably connected to the fixed part. A spring is connected between the fixed part and a second end of the arm. A movable part has an end fixed to the arm and a mediate portion of the movable part is pivotably connected to the fixed part. A positioning seat is movably positioned on the rod and a stationary pulley is connected to the positioning seat. A movable pulley is connected to the arm and a rope reeves through the stationary pulley and the movable pulley. When pulling the rope, the arm is pivoted to move the movable part toward the fixed part to prune branches when the arm is pivoted.
    Type: Application
    Filed: July 25, 2007
    Publication date: January 29, 2009
    Inventor: Pao-Lu Chen
  • Publication number: 20070119057
    Abstract: A high-branch shears including a branch-shearing mechanism connected with one end of a connecting rod a pulley device composed of an adjustment unit, a movable pulley and a cord passed through and wound on the adjustment unit and the movable pulley. The movable pulley is pivotally mounted on a pulley rack which is pivotally connected with the branch-shearing mechanism. The adjustment unit includes a first fixed pulley, a movable member, a fixed seat and a locating member. The movable member is slidably fitted on the connecting rod. The first fixed pulley is pivotally mounted on the movable member. The fixed seat is fixed on the branch-shearing mechanism or the connecting rod. The locating member is disposed between the movable member and the fixed seat for adjustably fixing a distance between the movable member and the fixed seat. One end of the cord is fixed on the pulley rack. The cord is sequentially passed through and wound on the first fixed pulley and the movable pulley.
    Type: Application
    Filed: November 25, 2005
    Publication date: May 31, 2007
    Inventor: Pao-Lu Chen
  • Patent number: 6422780
    Abstract: A structure for connecting a tool with a grip, including an insertion rod, an outer sheath and a fastening ring. The insertion rod is inserted in the outer sheath. One side of the insertion rod has a projecting block formed with a transverse recess. The outer sheath is formed with a split in which the projecting block of the insertion rod is inserted. A periphery of the outer sheath is formed with an annular groove corresponding to the transverse recess of the projecting block. The inner circumference of the fastening ring is formed with an annular rib fitted in the annular groove. The rib is formed with a dent having a width slightly larger than the width of the split. When rotating the fastening ring, the rib is engaged in the transverse recess of the projecting block to restrict the insertion rod from displacement.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: July 23, 2002
    Inventor: Pao-Lu Chen
  • Publication number: 20010000833
    Abstract: A structure for connecting a tool with a grip, including an insertion rod, an outer sheath and a fastening ring. The insertion rod is inserted in the outer sheath. One side of the insertion rod has a projecting block formed with a transverse recess. The outer sheath is formed with a split in which the projecting block of the insertion rod is inserted. A periphery of the outer sheath is formed with an annular groove corresponding to the transverse recess of the projecting block. The inner circumference of the fastening ring is formed with an annular rib fitted in the annular groove. The rib is formed with a dent having a width slightly larger than the width of the split. When rotating the fastening ring, the rib is engaged in the transverse recess of the projecting block to restrict the insertion rod from displacement.
    Type: Application
    Filed: December 13, 2000
    Publication date: May 10, 2001
    Inventor: Pao-Lu Chen