Patents by Inventor Hung-Liang Chou

Hung-Liang Chou 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: 8152957
    Abstract: An absorbent cellulosic sheet having a variable local basis weight includes a papermaking-fiber reticulum provided with (a) a plurality of elongated densified regions of compressed papermaking fibers, the densified regions being oriented generally along the machine direction (MD) of the sheet and having a relatively low local basis weight, as well as leading and trailing edges at their longitudinal extremities, and (b) a plurality of fiber-enriched, pileated regions connected with the plurality of elongated densified regions, the pileated regions having (i) a relatively high local basis weight and (ii) a plurality of cross-machine direction (CD) extending crests having concamerated CD profiles such that the extending crests of the pileated regions are arcuate and extend around the leading and trailing edges of the plurality of elongated densified regions.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: April 10, 2012
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Steven L. Edwards, Guy H. Super, Stephen J. McCullough, Ronald R. Reeb, Hung Liang Chou, Kang Chang Yeh, John H. Dwiggins, Frank D. Harper
  • Patent number: 8130524
    Abstract: A bi-directional DC to DC power converter includes two DC sources, two inductors respectively connected to the two DC sources, a first switch and a second switch respectively connected to the two inductors, two capacitors respectively connected to the two switches, and a third switch connected between the two inductors. The first, second and third switches are respectively connected reversely with a diode in parallel. When the third switch is alternately turned on and off and the first and second switches are always turned off, the power converter operates as a boost power converter and electric energy flows from the two DC sources to the two capacitors. When the third switch is always turned off and the first and second switches are synchronously turned on or off, the power converter operates as a buck power converter and electric energy flows from the two capacitors to the two DC sources.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: March 6, 2012
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Yi-Hu Lee, Wen Hsu, Chin-Chang Wu, Hung-Liang Chou, Ya-Tsung Feng
  • Patent number: 8080130
    Abstract: Kitchen roll toweling having surprising softness, absorbency and bulk is formed from a furnish comprising long cellulosic fiber having: (i) average weight-weighted fiber length of at least 2.5 mm; coarseness at least 15.5 mg/100 mm; and a Canadian Standard freeness of at least 600 ml combined with (ii) short cellulosic fiber having an average weight-weighted fiber length of at most 1.9 mm having a Canadian Standard freeness of at least 500 ml in a weight ratio of short fiber to long fiber of at least 0.25 to 1.0 to form a nascent web having a consistency in the range from about 10% to about 35% which is rush transferred from one fabric to another at a speed differential of at least about 15%; and creping the web from a Yankee dryer while controlling the real crepe to at most 3% and thereafter converting the web to form a two ply product having a basis weight of at least 29 lb/rm and caliper of at least 220 mils/8 sheets.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: December 20, 2011
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Frank D. Harper, Mark L. Robinson, Hung Liang Chou, Steven R. Olson, Martin A. Hynnek, Gary L. Worry
  • Patent number: 8076799
    Abstract: A UPS system includes one or more UPS units with identical or different capacities. A control circuit, used to control a DC/AC inverter of the UPS unit, includes a voltage feedback control circuit and a current feedforward control circuit. The voltage feedback control circuit is used to control the amplitude and the waveform of load voltage. The current feedforward control circuit is used to operate the DC/AC inverter of the UPS unit as a virtual fundamental resistor and a virtual harmonic resistor which are serially connected to an output terminal of the DC/AC inverter such that each UPS unit can be distributed to provide an output current according to the capacity ratio of the UPS system.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: December 13, 2011
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Chin-Chang Wu, Hung-Liang Chou, Yu-Hsiu Lin, Wen-Jie Hou, Han-Sheng Wei
  • Publication number: 20110260692
    Abstract: An estimation method for residual discharging time of batteries includes the steps of: providing a set of battery-discharge-current intervals and a set of battery-discharge equations, setting discharge time of each battery-discharge-current intervals zero; detecting a discharge current, voltage and time of batteries; judging whether the discharge current exceeding all of the battery-discharge-current intervals; selecting one of the battery-discharge-current intervals and the associated battery-discharge equation according to the detected discharge current; calculating an estimation of residual discharging time; accumulating and recording the discharge time; judging whether the discharge voltage being lower than a predetermined value and calculating an estimation error of the residual discharging time; adjusting parameters of the battery-discharge equation for reducing the estimation error of the residual discharging time if the estimation error is greater than a predetermined error value.
    Type: Application
    Filed: November 18, 2010
    Publication date: October 27, 2011
    Inventors: Hung-Liang Chou, Yu-Hua Sun, Chin-Chang Wu, Wen-Jung Chiang
  • Patent number: 8031497
    Abstract: A three-leg power converter apparatus including first, second and third input/output ports, a three-leg bridge converter, a filter circuit, a decoupling circuit and a controller is presented. The three-leg bridge converter has three single-leg circuits, two DC terminals connecting to two terminals of the first input/output port, and three mid-terminals with each of them being formed by a middle point of one of the three single-leg circuits. The controller connects to the three-leg bridge converter for controlling an input or output current passing through each DC terminal and mid-terminal. The filter circuit connects between two of the mid-terminals and the second input/output port. The decoupling circuit has two terminals connecting to the second input/output port and another terminal connecting to a terminal of the third input/output port, with the third input/output port having another terminal connecting to the other mid-terminal that dose not connect with the filter circuit.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: October 4, 2011
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Hung-Liang Chou, Yu-Hua Sun, Chin-Chang Wu, Ya-Tsung Feng
  • Patent number: 8009446
    Abstract: A ripple voltage suppression apparatus includes a DC/DC converter and a control circuit. The DC/DC converter has a power electronic switch. The control circuit has a voltage detector detecting a DC output voltage of the DC/DC converter, a ripple voltage suppression circuit receiving the detected DC output voltage to generate an AC control signal for controlling an AC component of a duty ratio of the power electronic switch, an output voltage regulation circuit receiving the detected DC output voltage to generate a DC control signal for controlling an DC component of a duty ratio, an adder adding the AC and DC control signals to form a combined control signal, and a PWM circuit converting the combined control signal into a PWM signal to control the power electronic switch. Only the DC output voltage of the DC/DC converter has to be detected for the control circuit.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: August 30, 2011
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Hung-Liang Chou, Jia-Min Shen, Chin-Chang Wu, Li-Hsiang Lai, Lung-Chi Yang, Ya-Tsung Feng
  • Publication number: 20110146924
    Abstract: The present invention relates to the creation of toweling with surprisingly high absorbency using a furnish comprising a major proportion of recycle furnish when the furnish is creped from a Yankee dryer coated with a creping adhesive comprising polyvinyl alcohol and an epichlorohydrin crosslinked polyamide creping adhesive at a consistency corresponding to a sheet temperature (immediately prior to the creping blade) of between 225° F. and 255° F. (107° C. and 124° C.), preferably ranging from about 230° F. (110° C.) up to about 250° F. (121° C.).
    Type: Application
    Filed: December 7, 2010
    Publication date: June 23, 2011
    Applicant: GEORGIA-PACIFIC CONSUMER PRODUCTS LP
    Inventors: Kang Chang Yeh, Christopher J. Peters, Mark S. Hunter, Daniel J. Geddes, Hung Liang Chou
  • Publication number: 20110011545
    Abstract: An absorbent cellulosic sheet having variable local basis weight includes a papermaking-fiber reticulum provided with (i) a plurality of cross-machine direction (CD) extending, fiber-enriched pileated regions of relatively high local basis weight interconnected by (ii) a plurality of elongated densified regions of compressed papermaking fibers. The elongated densified regions have relatively low local basis weight and are generally oriented along the machine direction (MD) of the sheet and have an MD/CD aspect ratio of at least 1.5. The products are most preferably prepared by way of a compactive dewatering/wet crepe process.
    Type: Application
    Filed: September 23, 2010
    Publication date: January 20, 2011
    Inventors: Steven L. Edwards, Guy H. Super, Stephen J. McCullough, Ronald R. Reeb, Hung Liang Chou, Kang Chang Yeh, John H. Dwiggins, Frank D. Harper
  • Patent number: 7850823
    Abstract: An improved method of controlling build-up of adhesive coating on a Yankee drying cylinder preferably includes intermittently: (a) increasing the add-on rate of resinous adhesive to the drying cylinder substantially above the steady-state add-on rate; (b) segregating the absorbent sheet product produced while the add-on rate of resinous adhesive to the drying cylinder is elevated above the steady-state add-on rate from absorbent sheet product accumulated during steady-state operation; and (c) while the add-on rate of resinous adhesive to the drying cylinder is increased above the steady-state add-on rate, stripping at least a portion of the adhesive coating from the drying cylinder with a cleaning doctor.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: December 14, 2010
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Hung Liang Chou, Kang Chang Yeh
  • Patent number: 7843082
    Abstract: An islanding detection apparatus for a distributed generation power system and a detection method therefor operates a power converter to act as a virtual capacitor or inductor at a frequency close to but unequal to that of a utility power system under abnormal condition of the utility power system. When power failure occurs in the utility power system, only the distributed generation power system supplies power to a load so that a load voltage has been changed in at least one of amplitude and frequency which can be immediately detected islanding phenomenon.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: November 30, 2010
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Hung-Liang Chou, Wen-Jung Chiang, Chin-Chang Wu, Ya-Tsung Feng
  • Patent number: 7820008
    Abstract: An absorbent cellulosic sheet having variable local basis weight includes a papermaking-fiber reticulum provided with (i) a plurality of cross-machine direction (CD) extending, fiber-enriched pileated regions of relatively high local basis weight interconnected by (ii) a plurality of elongated densified regions of compressed papermaking fibers. The elongated densified regions have relatively low local basis weight and are generally oriented along the machine direction (MD) of the sheet and have an MD/CD aspect ratio of at least 1.5. The products are most preferably prepared by way of a compactive dewatering/wet crepe process.
    Type: Grant
    Filed: January 8, 2009
    Date of Patent: October 26, 2010
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Steven L. Edwards, Guy H. Super, Stephen J. McCullough, Ronald R. Reeb, Hung Liang Chou, Kang Chang Yeh, John H. Dwiggins, Frank D. Harper
  • Patent number: 7787267
    Abstract: An active power filter includes an energy storage capacitor, an inverter, a filtering circuit and a controller. The inverter is controlled to act as a virtual resister at a fundamental frequency for compensating for the power loss of the active power filter, to act as a virtual capacitor at a fundamental frequency for compensating for a fundamental reactive power of the load, and/or to generate a harmonic current for suppressing the harmonic currents of specific orders of the load.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: August 31, 2010
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Chin-Chang Wu, Hung-Liang Chou, Wen-Pin Hsu, Yu-Ting Kuo, Jiunn-Jye Yang
  • Publication number: 20100201341
    Abstract: A three-leg power converter apparatus including first, second and third input/output ports, a three-leg bridge converter, a filter circuit, a decoupling circuit and a controller is presented. The three-leg bridge converter has three single-leg circuits, two DC terminals connecting to two terminals of the first input/output port, and three mid-terminals with each of them being formed by a middle point of one of the three single-leg circuits. The controller connects to the three-leg bridge converter for controlling an input or output current passing through each DC terminal and mid-terminal. The filter circuit connects between two of the mid-terminals and the second input/output port. The decoupling circuit has two terminals connecting to the second input/output port and another terminal connecting to a terminal of the third input/output port, with the third input/output port having another terminal connecting to the other mid-terminal that dose not connect with the filter circuit.
    Type: Application
    Filed: April 30, 2009
    Publication date: August 12, 2010
    Applicant: Ablerex Electronics Co., Ltd.
    Inventors: Hung-Liang Chou, Yu-Hua Sun, Chin-Chang Wu, Ya-Tsung Feng
  • Publication number: 20100184902
    Abstract: An improved creping adhesive is prepared by first reacting a dibasic carboxylic acid, or its ester, half-ester, or anhydride derivative, with a polyalkylene polyamine, preferably in aqueous solution, under conditions suitable to produce a water soluble polyamide. The water-soluble polyamide is then reacted with an epihalohydrin until substantially fully cross-linked, and stabilized by acidification with phosphoric acid at the end of the polymerization reaction to form a water-soluble poly(aminoamide)-epihalohydrin creping adhesive that is re-wetable and facilitates water spray removal of buildup so as to lengthen the life of the creping blades, with attendant significant decrease in downtime and maintenance.
    Type: Application
    Filed: March 30, 2010
    Publication date: July 22, 2010
    Applicants: GEORGIA-PACIFIC CONSUMER PRODUCTS LP, GEORGIA-PACIFIC CHEMICALS LLC
    Inventors: Jeffery J. Boettcher, Nancy S. Clungeon, Hung Liang Chou, Clay E. Ringold, Dexter C. Johnson
  • Patent number: 7733670
    Abstract: A bidirectional active power conditioner includes a DC side, a bidirectional DC/DC power converter, a DC/AC inverter and an AC side. The DC side electrically connects with a DC source while the AC side electrically connects with a load and an AC source. The bidirectional DC/DC power converter is controlled via high-frequency pulse width modulation (PWM) switching so as to generate a predetermined DC voltage or DC current while the DC/AC inverter is controlled to convert the predetermined DC voltage or DC current into a predetermined AC voltage or AC current.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: June 8, 2010
    Assignee: Ablerex Electronics Co., Ltd.
    Inventors: Ya-Tsung Feng, Chin-Chang Wu, Hung-Liang Chou
  • Patent number: 7718035
    Abstract: An improved creping adhesive is prepared by first reacting a dibasic carboxylic acid, or its ester, half-ester, or anhydride derivative, with a polyalkylene polyamine, preferably in aqueous solution, under conditions suitable to produce a water soluble polyamide. The water-soluble polyamide is then reacted with an epihalohydrin until substantially fully cross-linked, and stabilized by acidification with phosphoric acid at the end of the polymerization reaction to form a water-soluble poly(aminoamide)-epihalohydrin creping adhesive that is re-wetable and facilitates water spray removal of buildup so as to lengthen the life of the creping blades, with attendant significant decrease in downtime and maintenance.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: May 18, 2010
    Assignees: Georgia-Pacific Consumer Products LP, Georgia-Pacific Chemicals LLC
    Inventors: Jeffery J. Boettcher, Nancy S. Clungeon, Hung Liang Chou, Clay E. Ringold, Dexter C. Johnson
  • Publication number: 20100085784
    Abstract: A ripple voltage suppression apparatus includes a DC/DC converter and a control circuit. The DC/DC converter has a power electronic switch. The control circuit has a voltage detector detecting a DC output voltage of the DC/DC converter, a ripple voltage suppression circuit receiving the detected DC output voltage to generate an AC control signal for controlling an AC component of a duty ratio of the power electronic switch, an output voltage regulation circuit receiving the detected DC output voltage to generate a DC control signal for controlling an DC component of a duty ratio, an adder adding the AC and DC control signals to form a combined control signal, and a PWM circuit converting the combined control signal into a PWM signal to control the power electronic switch. Only the DC output voltage of the DC/DC converter has to be detected for the control circuit.
    Type: Application
    Filed: February 16, 2009
    Publication date: April 8, 2010
    Inventors: Hung-Liang CHOU, Jia-Min Shen, Chin-Chang Wu, Li-Hsiang Lai, Lung-Chi Yang, Ya-Tsung Feng
  • Publication number: 20100072819
    Abstract: A bidirectional DC to DC power converter includes two DC sources, two inductors respectively connected to the two DC sources, a first switch and a second switch respectively connected to the two inductors, two capacitors respectively connected to the two switches, and a third switch connected between the two inductors. The first, second and third switches are respectively connected reversely with a diode in parallel. When the third switch is alternately turned on and off and the first and second switches are always turned off, the power converter operates as a boost power converter and electric energy flows from the two DC sources to the two capacitors. When the third switch is always turned off and the first and second switches are synchronously turned on or off, the power converter operates as a buck power converter and electric energy flows from the two capacitors to the two DC sources.
    Type: Application
    Filed: July 8, 2009
    Publication date: March 25, 2010
    Applicant: ABLEREX ELECTRONICS CO., LTD
    Inventors: Yi-Hu Lee, Wen Hsu, Chin-Chang Wu, Hung-Liang Chou, Ya-Tsung Feng
  • Patent number: 7608164
    Abstract: A method of manufacturing absorbent sheet is directed to a wet-press/fabric-crepe process wherein add-on of adhesive to the Yankee surface is at relatively low levels, yet sheet transfer is maintained and production increased. Materials are selected and process parameters are controlled such that a paper machine can be operated for at least 4 hours before the Yankee coating needs to be stripped. Preferably, average increase in Yankee hood temperature is less than 1° F./minute during a production interval.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: October 27, 2009
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Hung Liang Chou, Mark S. Hunter, Kang Chang Yeh