Patents by Inventor Ming-Chuan Cheng

Ming-Chuan Cheng 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: 20180273347
    Abstract: A mechanism for linking a chair and a footrest of a stairlift to each other includes: a base; a chair mounted on the base and having a seat swingably connected to the base and a cord control portion; a footrest having a plate pivotally connected to the base; a link unit having a first link and a footrest pivotal portion for driving the footrest to swing, wherein the first link has a base pivotal connection portion pivotally connected to the base, a cord-penetrable portion, and a spring-hooked portion; a control cable having a cord penetrating the cord-penetrable portion, wherein the cord has a first end connected to the cord control portion of the chair, a second end, and a link-pressing portion for pressing against the cord-penetrable portion; and a cable-connected spring with two ends hooked to the base and the second end of the control cable, respectively.
    Type: Application
    Filed: March 24, 2017
    Publication date: September 27, 2018
    Inventor: Ming-Chuan CHENG
  • Patent number: 10081517
    Abstract: A mechanism for linking a chair and a footrest of a stairlift to each other includes: a base; a chair mounted on the base and having a seat swingably connected to the base and a cord control portion; a footrest having a plate pivotally connected to the base; a link unit having a first link and a footrest pivotal portion for driving the footrest to swing, wherein the first link has a base pivotal connection portion pivotally connected to the base, a cord-penetrable portion, and a spring-hooked portion; a control cable having a cord penetrating the cord-penetrable portion, wherein the cord has a first end connected to the cord control portion of the chair, a second end, and a link-pressing portion for pressing against the cord-penetrable portion; and a cable-connected spring with two ends hooked to the base and the second end of the control cable, respectively.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: September 25, 2018
    Assignee: Merits Health Products Co., Ltd.
    Inventor: Ming-Chuan Cheng
  • Patent number: 10053334
    Abstract: An overspeed braking mechanism for a stairlift includes: a main shaft driven by a motor to rotate; a claw member connecting with the main shaft to thereby rotate synchronously with the main shaft and having a tooth; a cam member connecting with the claw member and having an abutting portion spaced apart from the tooth of the claw member radially by a predetermined angle; a driven unit having a cam contact portion, wherein the abutting portion of the cam member abuts against the cam contact portion to cause the driven unit to swing, whereas a pawl portion of a claw contact member engages with the tooth of the claw member and has a switch contact portion; and a micro switch adapted to be touched by the switch contact portion, controlling the motor to drive the main shaft to rotate.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: August 21, 2018
    Assignee: Merits Health Products Co., Ltd.
    Inventor: Ming-Chuan Cheng
  • Patent number: 9944208
    Abstract: A leg rest device of a power vehicle includes: a supporting unit; a first lifting unit pivotally provided at the supporting unit and pivotable with respect to the supporting unit; a second lifting unit mounted to the first lifting unit and movable in a telescoping manner; an actuation unit connected to the supporting unit and configured to drive the first lifting unit; and a linkage unit having a first connecting member, a second connecting member, and a third connecting member, wherein the first connecting member and the second connecting member are separately and pivotally connected to the supporting unit while the third connecting member is separately and pivotally connected to the first connecting member, the second connecting member, and the second lifting unit.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: April 17, 2018
    Assignee: Merits Health Products Co., Ltd.
    Inventor: Ming-Chuan Cheng
  • Patent number: 9883979
    Abstract: A seat back linking mechanism includes a base frame having a pivot portion; a back frame pivotally connected to the base frame; an actuation member slidably coupled to the back frame; a linkage having a first link and a second link pivotally coupled together, the first link and the second link being respectively pivotally coupled to the pivot portion of the base frame and the actuation member, and a driven slot; and a drag member having a drag pin adapted for dragging the driven slot of the linkage.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: February 6, 2018
    Assignee: Merits Health Products Co., Ltd.
    Inventor: Ming-Chuan Cheng
  • Publication number: 20160331609
    Abstract: A leg rest device of a power vehicle includes: a supporting unit; a first lifting unit pivotally provided at the supporting unit and pivotable with respect to the supporting unit; a second lifting unit mounted to the first lifting unit and movable in a telescoping manner; an actuation unit connected to the supporting unit and configured to drive the first lifting unit; and a linkage unit having a first connecting member, a second connecting member, and a third connecting member, wherein the first connecting member and the second connecting member are separately and pivotally connected to the supporting unit while the third connecting member is separately and pivotally connected to the first connecting member, the second connecting member, and the second lifting unit.
    Type: Application
    Filed: May 12, 2016
    Publication date: November 17, 2016
    Inventor: MING-CHUAN CHENG
  • Patent number: 9493094
    Abstract: A seat tilt angle control device includes a tilt unit including a drive mechanism for tilting the tilt unit within a predetermined range and a mounting assembly, a control unit angularly adjustably mounted in the mounting assembly of the tilt unit and including a switch electrically coupled to the drive mechanism and movable between a first angle range where the switch controls the drive mechanism to be movable and a second angle range where the switch controls the drive mechanism to be immovable.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: November 15, 2016
    Assignee: MERITS HEALTH PRODUCTS, CO., LTD.
    Inventor: Ming-Chuan Cheng
  • Patent number: 9302691
    Abstract: A folding mechanism of vehicle includes a pivot unit having a stationary gear, a chassis unit having a frame pivotally connected with the pivot unit, a swivelable unit pivotally connected with the chassis unit and fixedly connected with a driven gear, and a rack engaged with the stationary gear of the pivot unit and the driven gear of the swivelable unit. When the chassis unit is pivotally folded relative to the pivot unit, the rack is moved to drive the driven gear to rotate, such that the swivelable unit swings relative to the chassis unit.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: April 5, 2016
    Assignee: MERITS HEALTH PRODUCTS CO., LTD.
    Inventor: Ming-Chuan Cheng
  • Publication number: 20160089285
    Abstract: A folding device of a power scooter includes a base which includes a front portion and a rear portion. Two folding units are located on two sides of the base and pivotably connected between the front portion and the rear portion. The rear wheel unit is driven by a motor and moves toward the front wheel unit of the scooter to fold the front and rear portions.
    Type: Application
    Filed: September 30, 2014
    Publication date: March 31, 2016
    Inventor: Ming-Chuan Cheng
  • Publication number: 20160022038
    Abstract: A seat back linking mechanism includes a base frame having a pivot portion; a back frame pivotally connected to the base frame; an actuation member slidably coupled to the back frame; a linkage having a first link and a second link pivotally coupled together, the first link and the second link being respectively pivotally coupled to the pivot portion of the base frame and the actuation member, and a drag portion; and a drag member having a drag portion adapted for dragging the drag portion of the linkage.
    Type: Application
    Filed: July 22, 2015
    Publication date: January 28, 2016
    Inventor: MING-CHUAN CHENG
  • Publication number: 20160023574
    Abstract: A seat tilt angle control device includes a tilt unit including a drive mechanism for tilting the tilt unit within a predetermined range and a mounting assembly, a control unit angularly adjustably mounted in the mounting assembly of the tilt unit and including a switch electrically coupled to the drive mechanism and movable between a first angle range where the switch controls the drive mechanism to be movable and a second angle range where the switch controls the drive mechanism to be immovable.
    Type: Application
    Filed: July 22, 2015
    Publication date: January 28, 2016
    Inventor: MING-CHUAN CHENG
  • Publication number: 20150061263
    Abstract: A folding mechanism of vehicle includes a pivot unit having a stationary gear, a chassis unit having a frame pivotally connected with the pivot unit, a swivelable unit pivotally connected with the chassis unit and fixedly connected with a driven gear, and a rack engaged with the stationary gear of the pivot unit and the driven gear of the swivelable unit. When the chassis unit is pivotally folded relative to the pivot unit, the rack is moved to drive the driven gear to rotate, such that the swivelable unit swings relative to the chassis unit.
    Type: Application
    Filed: August 28, 2014
    Publication date: March 5, 2015
    Inventor: Ming-Chuan CHENG
  • Patent number: 8286738
    Abstract: A wheel set structure of an electric wheelchair is disclosed to include a wheelchair frame, which defines a first steering direction and a second steering direction reversed to the first steering direction, at least one swinging mechanism pivotally mounted on the wheelchair frame each having a swinging member and a wheel holder, at least one transmission wheel assembly connected to the swinging member each having a motor and a driving wheel coupled to and rotatable by the motor, and at least one first wheel assembly mounted on the wheel holder each pivotally holding a wheel. When the at least one swinging member is biased relative to the at least one wheelchair frame, the at least one first wheel assembly is biased with the at least one swinging member so that the elevation of the wheel of each first wheel assembly and the elevation of the driving wheel of each transmission wheel assembly are relatively changed at a constant ratio.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: October 16, 2012
    Assignee: Merits Health Products Co., Ltd.
    Inventor: Ming-Chuan Cheng
  • Publication number: 20110012316
    Abstract: A wheel set structure of an electric wheelchair is disclosed to include a wheelchair frame, which defines a first steering direction and a second steering direction reversed to the first steering direction, at least one swinging mechanism pivotally mounted on the wheelchair frame each having a swinging member and a wheel holder, at least one transmission wheel assembly connected to the swinging member each having a motor and a driving wheel coupled to and rotatable by the motor, and at least one first wheel assembly mounted on the wheel holder each pivotally holding a wheel. When the at least one swinging member is biased relative to the at least one wheelchair frame, the at least one first wheel assembly is biased with the at least one swinging member so that the elevation of the wheel of each first wheel assembly and the elevation of the driving wheel of each transmission wheel assembly are relatively changed at a constant ratio.
    Type: Application
    Filed: July 14, 2009
    Publication date: January 20, 2011
    Applicant: Merits Health Products Co. Ltd.
    Inventor: Ming-Chuan CHENG
  • Patent number: 7775307
    Abstract: A power wheelchair includes a frame, on which a pair of front wheel sets, a pair of middle wheel sets, a pair of rear wheel sets and a pair of elastic devices are provided. Each of the front wheel sets includes a front wheel mount having a first connection portion pivoted to the frame, and a second connection portion connected to a front wheel. Each of the middle wheel sets includes a middle wheel mount having a first connection portion pivoted on the frame, and a second connection portion, connected to a middle wheel. The elastic device are provided between the front wheel mounts and the middle wheel mounts respectively to cushion a swing of the front wheel set and the middle wheel set relative to the frame.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: August 17, 2010
    Assignee: Merite Health Products Co., Ltd.
    Inventor: Ming-Chuan Cheng
  • Publication number: 20090050381
    Abstract: A power wheelchair includes a frame having first and second pivot portions on each of opposite sides of one end thereof, a pair of first wheel sets each having a first wheel mount pivoted to one of the second pivot portions of the frame and a first wheel rotatably connected to the first wheel mount, a pair of driving wheel sets each having a driving wheel mount pivoted to one of the first pivot portions of the frame and a driving wheel rotatably connected to the driving wheel mount, and a pair of suspension devices each connected between the first wheel mount of one of the first wheel sets and the driving wheel mount of one of the driving wheel sets. Thus, the power wheelchair has advantages of stable construction and safety in use.
    Type: Application
    Filed: December 13, 2007
    Publication date: February 26, 2009
    Applicant: Merits Health Productions Co., LTD
    Inventor: Ming-Chuan CHENG
  • Publication number: 20080264702
    Abstract: A power wheelchair includes a frame, on which a pair of front wheel sets, a pair of middle wheel sets, a pair of rear wheel sets and a pair of elastic devices are provided. Each of the front wheel sets includes a front wheel mount having a first connection portion pivoted to the frame, and a second connection portion connected to a front wheel. Each of the middle wheel sets includes a middle wheel mount having a first connection portion pivoted on the frame, and a second connection portion, connected to a middle wheel. The elastic device are provided between the front wheel mounts and the middle wheel mounts respectively to cushion a swing of the front wheel set and the middle wheel set relative to the frame.
    Type: Application
    Filed: April 25, 2007
    Publication date: October 30, 2008
    Applicant: Merits Health Products Co., Ltd.
    Inventor: Ming-Chuan Cheng
  • Patent number: D744380
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: December 1, 2015
    Assignee: MERITS HEALTH PRODUCTS CO., LTD.
    Inventor: Ming-Chuan Cheng
  • Patent number: D808868
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: January 30, 2018
    Assignee: MERITS HEALTH PRODUCTS CO., LTD.
    Inventor: Ming-Chuan Cheng
  • Patent number: D871272
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: December 31, 2019
    Assignee: MERITS HEALTH PRODUCTS CO., LTD.
    Inventor: Ming-Chuan Cheng