Patents by Inventor C. Y. Chung

C. Y. Chung 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: 11291276
    Abstract: A closed end zipper includes a bottom stop at the end of one zipper tape, and a pin at the end of the other zipper tape. The bottom stop has a pin hole and a first detent portion in the pin hole. The pin has a second detent portion formed on the front surface and/or one lateral surface thereof corresponding to the first detent portion. When used to manufacture clothing, the two separate zipper tapes can be sewn on the fabric separately through the template, and then the pin of the other zipper tape is inserted into the pin hole of the bottom stop, so that the second detent portion and the first detent portion snap together. Using this structure, the closed end nylon zipper or resin zipper are suitable for the automated template sewing process to achieve a simple and stable assembly without separation.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: April 5, 2022
    Inventor: Roger C. Y. Chung
  • Patent number: 9717310
    Abstract: A waterproof, open-end zipper includes a first zipper tape with a first engagement rail unit, a second zipper tape with a second engagement rail unit, a zipper slider slidable to force the first engagement rail unit and the second engagement rail unit into engagement with each other or separate them from each other, a box located at one end of the first engagement rail unit for receiving one end of the second engagement rail unit, a locating rod fixedly located at the first engagement rail unit, and a locating hole located at the second engagement rail unit for receiving the locating rod after insertion of the second engagement rail unit into the box to prohibit relative displacement between the first and second zipper tapes.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: August 1, 2017
    Inventor: Roger C. Y. Chung
  • Publication number: 20170208907
    Abstract: A waterproof, open-end zipper includes a first zipper tape with a first engagement rail unit, a second zipper tape with a second engagement rail unit, a zipper slider slidable to force the first engagement rail unit and the second engagement rail unit into engagement with each other or separate them from each other, a box located at one end of the first engagement rail unit for receiving one end of the second engagement rail unit, a locating rod fixedly located at the first engagement rail unit, and a locating hole located at the second engagement rail unit for receiving the locating rod after insertion of the second engagement rail unit into the box to prohibit relative displacement between the first and second zipper tapes.
    Type: Application
    Filed: January 27, 2016
    Publication date: July 27, 2017
    Inventor: Roger C. Y. Chung
  • Publication number: 20160183640
    Abstract: A snap button zipper includes two zipper tapes, a plurality of male and female snap buttons each including a clamping part and an engagement part for interlocking, and a zipper slider movable to force the male snap buttons into engagement with or away from the respective female snap buttons. The clamping part of each of the snap buttons includes two clamping panels, two sliding guide portions respectively defining a respective planar surface for coupling the zipper slider and guiding the zipper slider to move along the zipper tapes, and two mounting panels for fixation to opposing top and bottom walls of the respective zipper tape. The zipper slider includes two sliding guide grooves for receiving the male and female snap buttons, and a plurality of stop blocks respectively for contacting and moving along the planar surfaces of the sliding guide portions of the male and female snap buttons.
    Type: Application
    Filed: December 26, 2014
    Publication date: June 30, 2016
    Inventor: Roger C. Y. Chung
  • Publication number: 20160015133
    Abstract: A zipper with stamped metal zipper teeth includes two zipper tapes each having a rib at one lateral side thereof, and metal zipper teeth mounted at the rib of each zipper tape. Each zipper tooth has two mounting legs located at the rear end thereof and clamped on the rib. The ratio between the width of each zipper tooth and the gap between the mounting legs of each zipper tooth and the ratio between the combined height of each zipper tooth and the associated engagement protrusion and the gap between the mounting legs of each zipper tooth are in respective predetermined ranges so that the zipper teeth are stronger or even smaller than conventional #2 zipper teeth and have a tight connection between the zipper teeth and the zipper tape.
    Type: Application
    Filed: March 24, 2015
    Publication date: January 21, 2016
    Inventor: Roger C. Y. Chung
  • Publication number: 20150150358
    Abstract: A hanging belt includes a main belt, two supplementary belts respectively connected to two opposite ends of the main belt at an angle, an interlocking series of teeth extending along respective border edges of the main belt and the supplementary belts, a slide coupled between a part of the interlocking series of teeth at the main belt and another part of the interlocking series of teeth at one supplementary belt and movable to close the interlocking series of teeth and to convert the main belt and the supplementary belts into a bag, a clasp fastened to the slide, and fasteners fixedly mounted at the two opposite ends of the main belt and the supplementary belts and adapted for detachably securing the two supplementary belts to the main belt and to each other to hold the hanging belt in the form of a loop for hanging.
    Type: Application
    Filed: December 2, 2013
    Publication date: June 4, 2015
    Inventor: Roger C. Y. Chung
  • Publication number: 20140366336
    Abstract: A waterproof dual-track zipper includes two zipper tapes of the same structure, each zipper tape including a tape body, a mating strip integrally formed with one lateral side of the tape body and a sealing structure located on one side of the mating strip, the sealing structure including a male engaging member and a female engaging member, a first close-ft portion connected between the male and female engaging members and a second close-fit portion at an opposite lateral side of the male engaging member, and a zipper slider coupled between the two zipper tapes and movable to force the male engaging member of one zipper tape into engagement with the female engaging member of the other zipper tape and to abut the first and second close-fit portions of one zipper tape be against hook flanges of the female engaging member of the other zipper tape, achieving excellent waterproofing effects.
    Type: Application
    Filed: June 17, 2013
    Publication date: December 18, 2014
    Inventor: Roger C.Y. Chung
  • Patent number: 8793847
    Abstract: A double-layer nylon zipper includes two zipper tapes each having two series of teeth respectively disposed at opposing top and bottom sides of the fabric strip thereof, and a zipper slider coupled between the interlocking series of teeth of the two zipper tapes and having opposing top guard frame wall and bottom guard frame wall, a division wall between the top and bottom guard frame walls, a nose located on the top guard frame wall and a pull tap coupled to the nose. The top guard frame wall and bottom guard frame wall have respective first ends kept in flush and respective second ends in different lengths so that an accommodation space is defined right below the second end of the top guard frame wall outside the second end of the bottom guard frame wall to facilitate smooth interlocking of the interlocking series of teeth.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: August 5, 2014
    Inventor: Roger C. Y. Chung
  • Publication number: 20130340213
    Abstract: A double-layer nylon zipper includes two zipper tapes each having two series of teeth respectively disposed at opposing top and bottom sides of the fabric strip thereof, and a zipper slider coupled between the interlocking series of teeth of the two zipper tapes and having opposing top guard frame wall and bottom guard frame wall, a division wall between the top and bottom guard frame walls, a nose located on the top guard frame wall and a pull tap coupled to the nose. The top guard frame wall and bottom guard frame wall have respective first ends kept in flush and respective second ends in different lengths so that an accommodation space is defined right below the second end of the top guard frame wall outside the second end of the bottom guard frame wall to facilitate smooth interlocking of the interlocking series of teeth.
    Type: Application
    Filed: July 24, 2012
    Publication date: December 26, 2013
    Inventor: Roger C.Y. Chung
  • Patent number: 7789975
    Abstract: The present invention relates generally to a shape memory and/or super-elastic material, such as a nickel titanium alloy. Additionally or alternatively, the present invention relates to a super-elastic or pseudo-elastic material that has an initial transition temperature Af above a body temperature. The shape memory material can have a super-elasticity or pseudo-elasticity property at a temperature below the initial transition temperature Af of the material. For example, the shape memory material can have its workable temperature for producing super-elasticity or pseudo-elasticity of about 0° C. to 15° C. below the initial transition temperature Af. The shape memory material can be malleable at a room temperature, and become super-elastic or pseudo-elastic at a body temperature. In addition, the present invention relates to a method of making a shape memory or a super-elastic material.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: September 7, 2010
    Assignees: Versitech Limited, The City University of Hong Kong
    Inventors: Man Chee Kenneth Cheung, Kelvin W. K. Yeung, William W. Lu, C. Y. Chung
  • Publication number: 20090113676
    Abstract: A zipper includes male female teeth elements each having a split tube-like base fastened to a cylindrical flange at one side of a first zipper tape and a hollow receiving portion extending from the periphery of the respective split tube-like base and provided with a hook hole at an outer side, female teeth elements each having a split tube-like base fastened to the cylindrical flange of a second zipper tape and a hook strip extending from the periphery of the respective split tube-like base, and a slider body with a guide groove for guiding the hook strips of the male teeth elements into and out of the hook holes of the hollow receiving portions of the female teeth elements accurately without deviation.
    Type: Application
    Filed: November 7, 2007
    Publication date: May 7, 2009
    Inventor: Roger C.Y. Chung
  • Publication number: 20040265614
    Abstract: The present invention relates generally to a shape memory and/or super-elastic material, such as a nickel titanium alloy. Additionally or alternatively, the present invention relates to a super-elastic or pseudo-elastic material that has an initial transition temperature Af above a body temperature. The shape memory material can have a super-elasticity or pseudo-elasticity property at a temperature below the initial transition temperature Af of the material. For example, the shape memory material can have its workable temperature for producing super-elasticity or pseudo-elasticity of about 0° C. to 15° C. below the initial transition temperature Af. The shape memory material can be malleable at a room temperature, and become super-elastic or pseudo-elastic at a body temperature. In addition, the present invention relates to a method of making a shape memory or a super-elastic material.
    Type: Application
    Filed: April 19, 2004
    Publication date: December 30, 2004
    Inventors: Kenneth Man Chee Cheung, Kelvin Wai Kwok Yeung, William Weijia Lu, C.Y. Chung
  • Patent number: 6654988
    Abstract: A stoppable zipper slider is mainly a set of sustaining leaf springs, consisting of a single or a pair of pieces, on the inner surface of the covering portion of the zipper slider. The set of sustaining leaf springs, of single piece or two pieces, with one end sustaining downward against the top surface of a stopping hook piece and the other end propping up in between the tail of the hook piece and the slider body, enable a pull tab's sliding along a reserved gap within the covering portion and propping the bottom of one leaf spring open and then entering a braking notch of the stopping hook piece so as to accomplish the action of re-assembly.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: December 2, 2003
    Inventor: Roger C. Y. Chung
  • Patent number: 6618911
    Abstract: A bottom open-end type invisible zipper. The zipper includes a first zipper tape and a second zipper tape. The zipper tapes each having a respective series of teeth longitudinally disposed at an inner side for interlocking. A first plug member a second plug member are respectively fixedly fastened to the zipper tapes and longitudinally connected to one end of the series of teeth at the respective zipper tape. A movable bottom-end piece slidably is coupled to the first zipper tape, and the movable bottom-end piece includes a receiving chamber adapted to receive the first plug member and the second plug member in parallel. An escape-preventive structure is adapted to stop the movable bottom-end piece from falling out of the first zipper tape.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: September 16, 2003
    Inventor: Roger C. Y. Chung
  • Patent number: 6079085
    Abstract: An invisible zip fastener having a male slide and a female slide pulled to close/open interlocking teeth at two zipper tapes, wherein a male end connector and a female end connector are respectively mounted on the zipper tapes at one end of the interlocking teeth and arranged facing each other, the male end connector and the female end connector each having a longitudinally extended clamping(groove respectively fixedly fastened to the zipper tapes, the male end connector having a coupling tongue facing the female end connector, and a protruding tooth, which is forced into engagement with one tooth at one end of the opposed zipper tape when the interlocking teeth at the zipper tapes are closed, the female end connector having a coupling groove, which receives the coupling tongue of the male end connector when the interlocking teeth at the zipper tapes are closed, and a projecting rear block, which stops the male slide in place when the male slide is pulled to one end to close the interlocking teeth.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: June 27, 2000
    Inventor: Roger C. Y. Chung
  • Patent number: 5886429
    Abstract: A computer controllable testing and monitoring station forms short-term intervals of simulated alternating current power level disturbance, either undervoltage (sag) or overvoltage (swell). The station forms the short term voltage sags or swells so that their effects on sensitive equipment can be measured. The starting point of the sag or swell disturbance, as well as the time duration of the disturbance, can be accurately controlled.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: March 23, 1999
    Assignee: Board of Regents, The University of Texas System
    Inventors: W. Mack Grady, Ricardo Chan, Gregorio C-Y Chung, David Gerez, William Blane Leuschner, George P. Olson
  • Patent number: 5860192
    Abstract: A pull tab mounting arrangement includes a pull tab, and a coupling device coupled to a slide for a zipper to hold the pull tab, the coupling device has a substantially U-shaped spring wire rod at one end hung on a hanging hole on the slide, and a slotted bottom extension strip coupled to a split ring at one end of the pull tab, the U-shaped spring wire rod having one end pivoted to the body of the coupling device by a pivot pin, and an opposite end terminating in a retainer tip detachably forced by the spring power of the U-shaped spring wire rod into engagement with a retaining hole on the body of the coupling device.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: January 19, 1999
    Assignee: Keen Ching Industrial Co., Ltd.
    Inventor: Roger C. Y. Chung
  • Patent number: 5836059
    Abstract: The structural design of an invisible zipper with an open-end, particularly indicating an innovation which employs to modify the conventional invisible zipper with closed-end into an invisible zipper with open-end, mainly consists of an open-ended chain tape, a resilient tape hook, an inserting pin and a rectangular box; The ends of the left and right open-end chain tapes are formed into rubberized fabric portions by thermal melting rubber; an inserting pin and a resilient tape hook, which are made by plastic injection molding or punching, are fixed to the left and right rubberized fabric portions of the chain tape, and after the separating chain tapes are sewed to the clothes, and the resilient tape hook set up at one of the chain tapes is forced to wedge into a rectangular box, one can make use of this kind of design to fabricate an invisible zipper with open-end.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: November 17, 1998
    Assignee: Keen Ching Industrial Co., Ltd.
    Inventor: Roger C. Y. Chung