Patents by Inventor Ken Chen

Ken 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).

  • Patent number: 7735537
    Abstract: Disclosed is a portable wall-partition that includes a plurality of panels and at least one hinge that connects each of the plurality of panels to a neighboring panel. A foot is positioned on a lower edge of each of the plurality of panels. The foot includes a first extension and a second extension. Each of the extensions includes a distal end thereof. The first and the second extensions are connected to each other at a proximal end (opposite the end having a wheel) to form a vertex. The foot also includes a spring located at or near the vertex. The spring biases the first and the second extensions toward each other.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: June 15, 2010
    Inventors: John C. Hardt, II, Greg Moore, Chao-Ken Chen
  • Publication number: 20100111437
    Abstract: The invention discloses a method and a system for generating a boundary in the process of rasterizing a vector graphic as well as a method for producing the system and a method for clipping the vector graphic. The method for generating a boundary includes: segment-polylining the vector graphic and obtaining data of the line segments; obtaining data of the end pixels according to the data of the line segments; obtaining data of boundary pixels according to the data of the end pixels and the relationship between the data of the end pixels; obtaining bitmap data of the boundary pixels according to the data of the boundary pixels. The algorithm used in the invention is very simple and efficient; at the same time, the generation of the bitmap data of the boundary pixels can be carried out synchronously with the generation of bitmap data of the graphic itself.
    Type: Application
    Filed: December 25, 2007
    Publication date: May 6, 2010
    Applicants: PEKING UNIVERSITY FOUNDER GROUP CO., LTD., PEKING UNIVERSITY, BEIJING FOUNDER ELECTRONICS CO., LTD.
    Inventor: Ken Chen
  • Patent number: 7680024
    Abstract: The present invention provides a multilevel read-only optical disk and the method for producing the same. The multilevel read-only optical disk comprises a plurality of the recording pits, each of the longitudinal sections of the recording pits has a multilevel arbitrary shape; the areas of the longitudinal sections of the recording pits are not identical each other; the area of each of the longitudinal sections of the recording pits is defined by the following formula: S=?h(x)dx, where S represents the area of each of the longitudinal sections of the recording pits, x represents the coordinate value along the width direction of the recording pits, h(x) represents the pit-depth distribution function of the longitudinal sections of the recording pits and the region of the integration covers the whole longitudinal sections of the recording pits. Furthermore, the run length of the multilevel read-only optical disk is limited.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: March 16, 2010
    Assignee: Shanghai Xiangzhang Electronics Co., Ltd.
    Inventors: Duanyi Xu, Jianmin Liu, Hao Wang, Da Lu, Longfa Pan, Yi Ni, Ken Chen, Jianping Xiong, Dalin Wu, Jing Pei, Jianshe Ma, Xiaohui Lu, Chenyu Su
  • Publication number: 20100051211
    Abstract: A partition system for office or room includes a first and second partition wall, a pivot mechanism connected between the partition walls and a glide set mounted on the bottom of the partition walls. The pivot mechanism can allow the partition walls to relatively rotate. The glide set is composed of a pair of inverted vee feet and a support mechanism. The feet have flexibility for matching uneven surface. The support mechanism can rotate the feet to be parallel with the partition wall for easy storage.
    Type: Application
    Filed: September 2, 2009
    Publication date: March 4, 2010
    Inventor: Chao-Ken Chen
  • Patent number: 7672765
    Abstract: A system and method for providing a vehicle roll stability indicator that dynamically estimates the probability for vehicle rollover. The system determines vehicle kinematics from various vehicle sensors. From these kinematic values, the system estimates a roll angle of the vehicle and a bank angle of the vehicle. The estimated bank angle is used to correct the roll angle. The system determines a roll energy of the vehicle and a roll energy rate of the vehicle from the corrected roll angle. The system also calculates a tire lateral load transfer of the relative forces on the vehicle tires, and the duration that any of the tires have been off of the ground. From the roll energy, the roll energy rate, the tire lateral load transfer and the wheel airborne duration, the system calculates the roll stability indicator.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: March 2, 2010
    Assignee: GM Global Technnology Operations, Inc.
    Inventors: Nikolai K. Moshchuk, Shih-Ken Chen, Flavio Nardi
  • Patent number: 7648497
    Abstract: An elongated catheter device with a distal balloon assembly is adapted for endovascular insertion. Coolant injected through the device may, in different embodiments, directly cool tissue contacting the balloon, or may cool a separate internal chamber. In the first case, the coolant also inflates the balloon, and spent coolant is returned to the handle via a return passage extending through the body of the catheter. Plural balloons may be provided, wherein a secondary outer balloon surrounds a primary inner balloon, the primary balloon being filled with coolant and acting as the cooling chamber, the secondary balloon being coupled to a vacuum return lumen to serve as a robust leak containment device and thermal insulator around the cooling chamber. Various configurations, such as surface modification of the balloon interface, or placement of particles, coatings, or expandable meshes or coils in the balloon interface, may be employed to achieve this function.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: January 19, 2010
    Assignee: Medtronic Cryocath LP
    Inventors: Miriam Lane, Leonilda Capuano, David Holtan, Jean-Pierre Lalonde, Claudia Lückge, Jean-Luc Pageard, Marwan Abboud, Johnny Al Asmar, Abderrahim Benrabah, Ken Chen, John W. Lehmann, Philippe Marchand, Robert Martin, Fredric L. Milder, Daniel Nahon
  • Publication number: 20090319130
    Abstract: An active front-wheel vehicle steering control system that employs closed-loop control includes an adaptive compensation sub-system that compensates for changes in vehicle dynamic parameters. The control system includes a dynamic parameter estimation sub-system that provides an estimated front cornering compliance and rear cornering compliance based on a steering wheel angle signal, a vehicle lateral acceleration signal, a vehicle yaw rate signal and a vehicle speed signal. The closed-loop control includes active gain for each of vehicle yaw rate, yaw acceleration, side-slip and side-slip rate, all based on the vehicle speed and vehicle dynamic parameter changes for use in generating a steering angle control signal to the front wheels of the vehicle.
    Type: Application
    Filed: August 25, 2009
    Publication date: December 24, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Kwang-Keun Shin, Shih-Ken Chen
  • Publication number: 20090309072
    Abstract: A carbon nanotubes-like material is disclosed. The carbon nanotubes-like material comprises bacterial cellulose carbonized under an oxygen-free atmosphere. Also disclosed is a cathode material containing bacterial cellulose and LiFePO4, an anode material containing carbonized bacterial cellulose, a separator membrane containing aldehyde-treated bacterial cellulose, and a lithium battery containing a component comprising bacterial cellulose.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 17, 2009
    Inventors: Shiaw-Min Hwang, Han-Ken Chen, Bing-Joe Hwang
  • Publication number: 20090260907
    Abstract: A method is provided for controlling a parallel parking of a vehicle. A distance between the first object and the second object is remotely sensed. The distance is compared to a first predetermined distance and a second predetermined distance. An autonomous first steering strategy maneuver is performed for parking the vehicle between the first object and second object if the distance is greater than the first predetermined distance. The first steering strategy maneuver consists of a first predetermined number of steering cycles for parking the vehicle. An autonomous second steering strategy maneuver is performed for parking the vehicle between the first and second object if the distance is between the first predetermined distance and the second predetermined distance. The second steering strategy maneuver consists of a second predetermined number of steering cycles for parking the vehicle where the second is greater than the first predetermined number of steering cycles.
    Type: Application
    Filed: April 22, 2008
    Publication date: October 22, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Nikolai K. Moshchuk, Shih-Ken Chen
  • Patent number: 7599774
    Abstract: An active front-wheel vehicle steering control system that employs closed-loop control includes an adaptive compensation sub-system that compensates for changes in vehicle dynamic parameters. The control system includes a dynamic parameter estimation sub-system that provides an estimated front cornering compliance and rear cornering compliance based on a steering wheel angle signal, a vehicle lateral acceleration signal, a vehicle yaw rate signal and a vehicle speed signal. The closed-loop control includes active gain for each of vehicle yaw rate, yaw acceleration, side-slip and side-slip rate, all based on the vehicle speed and vehicle dynamic parameter changes for use in generating a steering angle control signal to the front wheels of the vehicle.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: October 6, 2009
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Kwang-Keun Shin, Shih-Ken Chen
  • Publication number: 20090235724
    Abstract: A system and method for determining vehicle CG height and mass in real-time. The method includes selecting a set of vehicle parameters to be considered that includes the vehicle mass and the center of gravity height of the vehicle. Frequency responses are generated using the dynamic model and a plurality of different values for the selected vehicle parameters. During vehicle operation, frequency responses are calculated from a measured vehicle lateral acceleration to a roll angle and/or a roll rate of the vehicle. The generated frequency responses and the calculated frequency responses are compared to determine which of the generated frequency responses more closely matches the calculated frequency responses. The generated frequency responses that most closely match the calculated frequency responses are used to determine the center of gravity height and the vehicle mass from the values for the vehicle parameters.
    Type: Application
    Filed: March 19, 2008
    Publication date: September 24, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Jihan Ryu, Nikolai K. Moshchuk, Shih-Ken Chen
  • Patent number: 7571039
    Abstract: A rollover avoidance system for changing the damping characteristics of suspension dampers at each wheel of a vehicle so as to mitigate the potential for vehicle rollover. The system includes a plurality of vehicle parameter sensors for measuring vehicle parameters and providing vehicle parameter signals. The system also includes a controller for generating a damper suspension command signal for each damper using the vehicle parameter signals. The controller considers a roll control factor representing a rollover condition of the vehicle and a yaw stability control factor representing a yaw condition of the vehicle to set the damping of the dampers to mitigate the potential for vehicle rollover.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: August 4, 2009
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Shih-Ken Chen, Nikolai K. Moshchuk, Cheng-Foo Chen
  • Patent number: 7571030
    Abstract: A system and method for estimating vehicle roll rate and roll angle. The system includes a suspension deflection sensor provided at each wheel of the vehicle that provides suspension measurement signals indicative of the roll of the vehicle. The system also includes a roll rate estimator that uses the suspension measurement signals and an estimated tire deflection of the wheels to provide a roll rate estimation signal. The system also includes a vehicle roll angle and a roll rate estimator that uses the roll rate estimation signal and a dynamic model to estimate the roll angle and refine the roll rate. The roll rate estimator calculates the roll rate one way if none of the vehicle wheels are off of the ground and calculates it another way if any of the wheels are off of the ground.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: August 4, 2009
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Jihan Ryu, Shih-Ken Chen, Nikolai K. Moshchuk
  • Patent number: 7546191
    Abstract: An active front steering (AFS) system that provides hand-wheel damping. The AFS system includes a damping control sub-system that determines a hand-wheel angular velocity based on the rate of change of a hand-wheel angle signal. The damping control sub-system determines the damping control signal by multiplying the angular velocity of the hand-wheel angle signal with a control gain. The damping control signal is added to a steering signal from a variable gear ratio control sub-system to generate a steering command signal. The damping control sub-system sets to the damping control signal to zero if a signal from a vehicle stability enhancement sub-system is activated.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: June 9, 2009
    Assignee: General Motors Corporation
    Inventors: William C. Lin, Shih-Ken Chen, Robert R. Bolio
  • Publication number: 20090087251
    Abstract: A telescopic device includes an outer tube, an inner tube, a sustaining rod, an elastic body, and a locking device. The outer tube receives the inner tube for axial traveling. A positioning portion is formed opposite to the locking device on the inner tube, the inner tube is free to axially travel inside the outer tube and only stopped by the engagement of the locking device and the positioning portion. The sustaining rod is arranged inside the outer tube, an end thereof is fixed to a retaining seat of the outer tube and another end serves to sustain the elastic body. The elastic body is arranged inside the inner tube, the two ends thereof are fixed to the opposite sides of an end of the inner tube.
    Type: Application
    Filed: September 17, 2008
    Publication date: April 2, 2009
    Inventor: Chao-Ken Chen
  • Publication number: 20090022786
    Abstract: The present invention provides an coated oral pharmaceutical dosage form comprising a composition of a non-steroidal anti-inflammatory drug (NSAID) as multilayered spherical granule combined with a composition of prostaglandin, and a film coating. The present invention also provides a method for manufacturing the dosage form, which comprising the steps of preparing the compositions of NSAID and prostaglandin separately, combing the compositions to form a pharmaceutical dosage form, and coating the dosage form with a film coating.
    Type: Application
    Filed: January 30, 2008
    Publication date: January 22, 2009
    Inventors: Fang-Chen Lee, Bin-Ken Chen, Han-Chiang Kuo, Chi-Huang Chen
  • Publication number: 20090008445
    Abstract: A method for providing virtual membership cards whereby by a card broker generates a virtual membership card based on the information of a card issuer and the information of a user and sends the virtual membership card to the mobile terminal of the user though a communication network. A virtual membership card system includes a membership management module, for managing card issuer account information, card user account information, and the virtual membership card information and a virtual membership card management module, including a card generation module, for generating a virtual membership card based on the information of the card issuer and the information of the user and a card distribution module, for sending the virtual membership card to the mobile terminal of the user though a communication network. With the present invention, merchants can easily issue, validate and maintain their membership cards, and the user may retrieve, use and manage his/her membership card at any place and at any time.
    Type: Application
    Filed: July 3, 2008
    Publication date: January 8, 2009
    Applicant: International Business Machines Corporation
    Inventors: Ken Chen, Lin Luo, Wei Xiong Shang, Chun Ying
  • Publication number: 20090000750
    Abstract: Disclosed is a portable wall-partition that includes a plurality of panels and at least one hinge that connects each of the plurality of panels to a neighboring panel. A foot is positioned on a lower edge of each of the plurality of panels. The foot includes a first extension and a second extension. Each of the extensions includes a distal end thereof. The first and the second extensions are connected to each other at a proximal end (opposite the end having a wheel) to form a vertex. The foot also includes a spring located at or near the vertex. The spring biases the first and the second extensions toward each other.
    Type: Application
    Filed: June 4, 2008
    Publication date: January 1, 2009
    Inventors: John C. Hardt, II, Greg Moore, Chao-Ken Chen
  • Patent number: 7440824
    Abstract: A system and method for estimating vehicle side-slip velocity that includes measuring the lateral acceleration of the vehicle, measuring the yaw rate of the vehicle, measuring the longitudinal speed of the vehicle and measuring the steering angle of the vehicle. The measured longitudinal speed is corrected to provide a true longitudinal speed using a filter factor based on the vehicle-dependent parameters and a steering angle. A constant is defined based on the measured longitudinal speed and a function is defined based on the combination of the vehicle-dependent parameters and the lateral acceleration. Side-slip acceleration is calculated using the measured lateral acceleration, the true longitudinal speed, the yaw rate, the constant and the function.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: October 21, 2008
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Shih-Ken Chen, Jihan Ryu, Nikolai K. Moshchuk
  • Publication number: 20080208406
    Abstract: A command interpreter for a vehicle stability enhancement system that uses a three degree-of-freedom vehicle model employing non-linear suspension and tire characteristics to calculate stability commands. The command interpreter includes a calculator that calculates a front tire lateral force, a calculator that calculates a rear tire lateral force and a command calculator that calculates a yaw-rate command signal, a lateral velocity command signal and a roll angle command signal. The front tire lateral force calculator and the rear tire lateral force calculator calculate the front and rear side-slip angles. The side-slip angles are then converted to a lateral force, where the conversion is selected based on the tire vertical load. The rear tire lateral force is modified for high side-slip angles so that the rear tire lateral force does not become saturated.
    Type: Application
    Filed: February 28, 2007
    Publication date: August 28, 2008
    Applicant: GM Global Technology Operations, Inc.
    Inventors: Shih-Ken Chen, Nikolai K. Moshchuk, Flavio Nardi