Patents by Inventor Jung-Hsien Chang

Jung-Hsien 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).

  • Publication number: 20020172548
    Abstract: An expandable rod is formed of an outer tube, an inner tube, and a locating device. The locating device comprises a connection tube, a fixation ring, a press member, and rotary tube. The connection tube is fixed on one end of the outer tube by the fixation ring. The press member is disposed in the rotary tube which is rotatable on the connection tube. The inner rod is slidably fitted into one end of the outer tube via the press member. The press member is actuated by the rotary tube to catch or release the rod body of the inner tube.
    Type: Application
    Filed: May 16, 2001
    Publication date: November 21, 2002
    Inventor: Jung-Hsien Chang
  • Patent number: 6363578
    Abstract: A handle of a pistol nozzle with improved gripping comfort. It contains an inner tube and an outer tube and a soft cover engageable with the inner tube to cover the inner tube. The soft cover is structured such that the soft cover and the outer tube integrally form separate external portions of the handle. The inner tube is provided along a longitudinal direction with two elongated side wings and a raised elongated rib for engaging with the soft cover. And the soft cover is provided with a recessed portion. The recessed portion is provided with a plurality of elongated slots, the elongated slots being engaged with the wings of the inner tube.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: April 2, 2002
    Inventor: Jung-Hsien Chang
  • Patent number: 6341737
    Abstract: A water nozzle which includes a rotary cover, a water distribution disk, a water discharging disk, and a water admission head. The rotary cover is provided with a plurality of water emission holes of varying shapes. The water emission holes are provided with a hollow water discharging pillar, a notch located at the front end of the discharging pillars, a rib wall located between two separated water discharging pillars. The water distribution disk is provided with a large water distribution hole, a small water distribution hole, and a plurality of intermediate water distribution holes corresponding to the water emission holes, and a water slot concentric with the large water distribution hole.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: January 29, 2002
    Inventor: Jung-Hsien Chang
  • Patent number: 6279839
    Abstract: A pistol nozzle comprises a main body, an action rod, a locating seat, a hand lever, and an adjustment sleeve. The main body has a handle which is provided with a flow hole in communication with a through hole of the main body. The action rod is movably disposed in the through hole and is provided with an arcuate slot and a spring fitted thereover. The locating seat is provided with a locating portion which is disposed in the slide slot of the locating seat for locating the action rod. The action rod is confined by the arcuate slot which is engaged with the protruded edge of the slide slot of the locating seat. The locating seat is provided with a threaded rod which is engaged with a threaded hole of the adjustment sleeve via a hole of the hand lever. As the hand lever is exerted on by an external force, the action rod displaces to bring about the discharge of water by the pistol nozzle.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: August 28, 2001
    Inventor: Jung-Hsien Chang
  • Patent number: 5970617
    Abstract: A tree pruner is composed of a fastening piece, a cutting piece, and two swivel pieces. The fastening piece is provided with a connection portion which is in turn provided with a pulley and is fastened with a bracing rod. The fastening piece is provide at one end thereof with a blade. The cutting piece is fastened pivotally with the fastening piece and provided with a toothed slot and a tool portion capable of cooperating with the blade of the fastening piece. The two swivel pieces are fastened pivotally with the fastening piece and provided with a control element which is put through the toothed slot and is linked with a spring. The cord such that the cutting piece is actuated to execute the severing of a tree twig in conjunction with the blade of the fastening piece.
    Type: Grant
    Filed: October 19, 1998
    Date of Patent: October 26, 1999
    Inventor: Jung-Hsien Chang
  • Patent number: 5950314
    Abstract: A step-separating shearing tool includes a first handle and a second handle. A first blade portion is connected to the first handle, and a second blade portion, which includes an L-shaped slot, is hinge-connected to the first blade portion and to the first handle. A rocker arm connects the second handle and the first blade portion. The step-separating shearing tool also includes an automatic step-separating mechanism. This mechanism includes: a double-oscillating rod, which is hinge-connected to the rocker arm; a slider on the double oscillating rod, which is received in the L-shaped slot of the second blade portion; and a torsion spring connected between the rocker arm and the double oscillating rod. When the shearing tool is used in a cutting operation for cutting items having a relatively small diameter, the slider is located in a short slot portion of the L-shaped slot during the entire cutting operation.
    Type: Grant
    Filed: August 5, 1997
    Date of Patent: September 14, 1999
    Inventor: Jung-Hsien Chang
  • Patent number: D447789
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: September 11, 2001
    Inventor: Jung-Hsien Chang
  • Patent number: D453463
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: February 12, 2002
    Inventor: Jung-Hsien Chang
  • Patent number: D413773
    Type: Grant
    Filed: October 19, 1998
    Date of Patent: September 14, 1999
    Inventor: Jung-Hsien Chang
  • Patent number: D420555
    Type: Grant
    Filed: August 22, 1998
    Date of Patent: February 15, 2000
    Inventor: Jung-Hsien Chang
  • Patent number: D427280
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: June 27, 2000
    Inventor: Jung-Hsien Chang