Patents by Inventor Kin Yu Wong

Kin Yu Wong 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: 11823856
    Abstract: An electrical switch including a switch housing, a switch circuit disposed within the switch housing. The switch circuit including includes a movable contact member mounted on a contact lever and a stationary contact member. The contact lever is configured for operable-interaction with an actuator. The actuator is configured for movement along an actuator movement axis relative to the contact lever between at least one of an OFF position whereby the contact lever is configured for arrangement in to the first configuration whereby the switch circuit is opened, and, an ON position in which the contact lever is configured for arrangement in to the second configuration whereby the switch circuit is closed.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: November 21, 2023
    Assignees: DEFOND COMPONENTS LIMITED, DEFOND ELECTECH CO., LTD.
    Inventor: Kin Yu Wong
  • Patent number: 11651915
    Abstract: An electrical switch device including a switch housing having first and second compartments separated by a partition; an electrical switch assembly disposed in the second compartment; a control knob configured for seating adjacent to the first compartment, and having a user engagement portion and a plunger configured to extend from user engagement portion from the first compartment in to the second compartment via an opening in the partition separating the first and second compartments when the control knob is seated, and said plunger being configured for movable interaction with the electrical switch assembly; and a sealing member including a base portion configured for securing of the sealing member to the housing, and, a tubular portion extending from the base portion and configured to surround the plunger so as to alleviate ingress of liquid from the first compartment in to the second compartment via the opening in the partition.
    Type: Grant
    Filed: January 13, 2022
    Date of Patent: May 16, 2023
    Assignee: DEFOND ELECTECH CO., LTD
    Inventor: Kin Yu Wong
  • Publication number: 20220254578
    Abstract: An snap-action type switch unit includes a switch housing; an actuator plunger configured for depressible movement via an aperture in the switch housing from a first position to a second position; a snap-action switch assembly which is operably-connected with the actuator plunger and responsive to the depressible movement of the actuator plunger so as to effect snap-action type movement of at least one movable contact between a normally opened position and a normally closed position with respect to at least one stationary contact to effect switching of electric power; and a signalling assembly which is operably-connected with the actuator plunger and responsive to the depressible movement of the actuator plunger so as to effect movement of at least one movable conductive element of the signalling assembly amongst a plurality of different electrical contact point configurations with respect to at least one stationary conductive element of the signalling assembly.
    Type: Application
    Filed: January 27, 2022
    Publication date: August 11, 2022
    Inventor: Kin Yu Wong
  • Publication number: 20220246373
    Abstract: An electrical switch device including a switch housing having first and second compartments separated by a partition; an electrical switch assembly disposed in the second compartment; a control knob configured for seating adjacent to the first compartment, and having a user engagement portion and a plunger configured to extend from user engagement portion from the first compartment in to the second compartment via an opening in the partition separating the first and second compartments when the control knob is seated, and said plunger being configured for movable interaction with the electrical switch assembly; and a sealing member including a base portion configured for securing of the sealing member to the housing, and, a tubular potion extending from the base portion and configured to surround the plunger so as to alleviate ingress of liquid from the first compartment in to the second compartment via the opening in the partition.
    Type: Application
    Filed: January 13, 2022
    Publication date: August 4, 2022
    Inventor: KIN YU WONG
  • Patent number: 11367577
    Abstract: A trigger assembly having: a housing with a switch; a trigger; an actuator movable from OFF wherein the switch is operably-opened, towards ON wherein the switch is operably-closed; a lock-on mechanism including a first locking member mounted proximate the trigger and a second locking member mounted proximate the housing; when the actuator is ON, said locking members are movable relative to each other into a locked configuration; a lock-off mechanism including a lock-off member that is movable about a rotation axis between locked-off-position, which restricts movement of the trigger and the actuator is restricted from movement, and non-locked-off-position, which does not restrict movement of the trigger and the actuator member is not restricted from movement; and a shaped-portion disposed proximate the housing that abuts the lock-off member when the trigger is moved towards the housing with the lock-off member in the locked-off-position, whereby the actuator is restricted from movement.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: June 21, 2022
    Assignees: DEFOND ELECTECH CO., LTD, DEFOND COMPONENTS LIMITED
    Inventor: Kin Yu Wong
  • Patent number: 11257639
    Abstract: A snap-action switch including: a housing in which a plurality of fixed contacts and a plurality of movable contacts are disposed therein, a plunger configured for depressible movement via an aperture in the housing from a first position in which the plunger is relatively extended outwardly of the housing via the aperture, into, a second position in which the plunger is relatively retracted inwardly of the housing via the aperture; and a snap-action assembly operably-connected with the plunger, the snap-action assembly being responsive to depressible movement of the plunger so as to effect snap-action type movement of the plurality of movable contacts between normally opened and normally closed positions with respect to the fixed contacts; a sealing element configured for arrangement around the plunger to occlude ingress of particulates, dust and water from entering the housing via the aperture, the sealing element including a flanged portion; and a securement element configured for arrangement around the sea
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: February 22, 2022
    Assignees: Defond Electech Co., Ltd, Defond Components Limited
    Inventor: Kin Yu Wong
  • Publication number: 20210183604
    Abstract: An electrical switch including: a switch housing; a switch circuit disposed within the switch housing; said switch circuit including a movable contact member mounted on a contact lever and a stationary contact member; the contact lever being configured for operable-interaction with an actuator, said actuator being configured for movement along an actuator movement axis relative to the contact lever between at least one of an OFF position whereby the contact lever is configured for arrangement in to the first configuration whereby the switch circuit is opened, and, an ON position in which the contact lever is configured for arrangement in to the second configuration whereby the switch circuit is closed; a biasing element configured for biasing the contact lever towards the second configuration; so that the switch circuit is closed when the actuator is moved relative to the contact lever in to the ON positions, said biasing element including a first end attached to a first attachment point in connection with a
    Type: Application
    Filed: December 11, 2020
    Publication date: June 17, 2021
    Inventor: Kin Yu WONG
  • Patent number: 10978257
    Abstract: A trigger assembly for an electrical device that includes a main body having a housing within which an electrical switch unit is disposed. The trigger assembly may include a trigger member having an engagement portion that is hingedly connected to the main body so that the trigger member is rotatable about a hinge relative to the main body. The trigger assembly may include an actuator member operably-connected to the trigger member that is movable between an OFF position and an ON position. The trigger assembly may include a lock-off mechanism including a lock-off member that is selectively operable to restrict movement of the trigger member towards the main body and to thereby restrict movement of the actuator member from the OFF position into the ON position, and, to not restrict movement of the trigger member toward the main body.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: April 13, 2021
    Assignees: DEFOND COMPONENTS LIMITED, DEFOND ELECTECH CO., LTD
    Inventors: Cheng Chen Nieh, Kin Yu Wong, Lap Yi Law
  • Patent number: 10965133
    Abstract: A battery pack system for use in connecting a battery pack to a battery pack receiving member of a machine so that the battery pack is operable to supply a suitable amount of power to the machine for operation of the machine via an electrical circuit path that is configurable for electrically connecting the battery pack to the machine, the system including: a first electrical connector member disposed along a first region of the electrical circuit path; and a second electrical connector member; wherein, responsive to the battery pack being connected to the battery pack receiving member of the machine, the second electrical connector member is configured for movement relative to the first electrical connector member to cooperatively form a first configuration which electrically closes the electrical circuit path via which the suitable amount of power is able to be supplied from the battery pack to the machine; and wherein, responsive to the battery pack being disconnected from the battery pack receiving member
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: March 30, 2021
    Assignees: Defond Electech Co., Ltd., Defond Components Limited
    Inventors: Tak Chuen Or, Cheng Chen Nieh, Kin Yu Wong
  • Publication number: 20210012980
    Abstract: A trigger assembly for an electrical device that includes a main body having a housing within which an electrical switch unit is disposed. The trigger assembly may include a trigger member having an engagement portion that is hingedly connected to the main body so that the trigger member is rotatable about a hinge relative to the main body. The trigger assembly may include an actuator member operably-connected to the trigger member that is movable between an OFF position and an ON position. The trigger assembly may include a lock-off mechanism including a lock-off member that is selectively operable to restrict movement of the trigger member towards the main body and to thereby restrict movement of the actuator member from the OFF position into the ON position, and, to not restrict movement of the trigger member toward the main body.
    Type: Application
    Filed: July 8, 2020
    Publication date: January 14, 2021
    Inventors: Cheng Chen NIEH, Kin Yu WONG, Lap Yi LAW
  • Publication number: 20200219675
    Abstract: A trigger assembly for use with an electrical device, said electrical device having an electric switch housing with an electrical switch unit disposed therein, the trigger assembly including; a trigger member configured for movement relative to the housing; an actuator member operably-connected to the trigger member and, responsive to movement of the trigger member relative to the housing, said actuator member being movable in a first direction relative to the housing from an OFF position in which the electrical switch is operably-opened by the actuator towards an ON position in which the electrical switch is operably-closed by the actuator, and movable in a second direction relative to the housing from the ON position towards the OFF position; a lock-on mechanism including a first locking member mounted proximate to the trigger member and a second locking member mounted proximate to the housing, wherein when the actuator member is moved in to the ON position, said first and second locking members are selecta
    Type: Application
    Filed: January 3, 2020
    Publication date: July 9, 2020
    Inventor: Kin Yu WONG
  • Patent number: 10685795
    Abstract: A trigger assembly for use with an electrical device, including a trigger member, an actuator member operably-connected to the trigger member, and a lock-on mechanism for selectably restricting movement of the trigger member relative to the housing.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: June 16, 2020
    Assignees: DEFOND ELECTECH CO. LTD., DEFOND COMPONENTS LIMITED
    Inventor: Kin Yu Wong
  • Publication number: 20200185167
    Abstract: A snap-action switch including: a housing in which a plurality of fixed contacts and a plurality of movable contacts are disposed therein, a plunger configured for depressible movement via an aperture in the housing from a first position in which the plunger is relatively extended outwardly of the housing via the aperture, into, a second position in which the plunger is relatively retracted inwardly of the housing via the aperture; and a snap-action assembly operably-connected with the plunger, said snap-action assembly being responsive to depressible movement of the plunger so as to effect snap-action type movement of the plurality of movable contacts between normally opened and normally closed positions with respect to the fixed contacts; a sealing element configured for arrangement around the plunger to occlude ingress of particulates, dust and water from entering the housing via the aperture, said sealing element including a flanged portion; and a securement element configured for arrangement around the s
    Type: Application
    Filed: December 6, 2019
    Publication date: June 11, 2020
    Inventor: Kin Yu Wong
  • Publication number: 20200090886
    Abstract: A sealing assembly for prevention of ingress of particulates and water into an electrical switch includes an engagement element with a rigid first abutment portion for circumscribing an aperture extending through the outer surface of the switch housing and a rigid first retention portion. Also included is a sealing element being slidingly engageable with the engagement element that includes a first complementary abutment portion. The sealing element is formed from an elastically resilient polymeric material so that sealing engagement with the engagement element occludes passage and ingress of external particulates, dust and water.
    Type: Application
    Filed: November 20, 2019
    Publication date: March 19, 2020
    Applicants: Defond Electech Co., Ltd., Defond Components Limited
    Inventor: Kin Yu WONG
  • Patent number: 10497523
    Abstract: A sealing assembly for prevention of ingress of particulates and water into an electrical switch includes an engagement element with a rigid first abutment portion for circumscribing an aperture extending through the outer surface of the switch housing and a rigid first retention portion. Also included is a sealing element being slidingly engageable with the engagement element that includes a first complementary abutment portion. The sealing element is formed from an elastically resilient polymeric material so that sealing engagement with the engagement element occludes passage and ingress of external particulates, dust and water.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: December 3, 2019
    Assignees: Defond Electech Co., Ltd., Defond Components Limited
    Inventor: Kin Yu Wong
  • Patent number: 10418195
    Abstract: A contact lever for use in an electrical switch assembly so as to allow selectable movement within the switch assembly of a contact lever contact member from electrical connection with a first stationary contact member into electrical connection with a second stationary contact member, the contact lever including: first and second lever arms that are connected at respective first ends to the contact lever contact member; said first and second lever arms having respective second ends, and, said first and second lever arms being configured to extend away from the contact member and to terminate at their respective second ends; a gap disposed between the first and second lever arms which separates the first and second lever arms as they extend away from the contact member, and wherein the gap is configured to allow movement of a spring element of the switch assembly therethrough; and a bridge member configured for connection with the first and second lever arms so as to traverse the gap separating the first and
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: September 17, 2019
    Assignee: Defond Electech Co., Ltd
    Inventor: Kin Yu Wong
  • Publication number: 20190198270
    Abstract: A trigger assembly for use with an electrical device, including a trigger member, an actuator member operably-connected to the trigger member, and a lock-on mechanism for selectably restricting movement of the trigger member relative to the housing.
    Type: Application
    Filed: August 24, 2018
    Publication date: June 27, 2019
    Inventor: Kin Yu Wong
  • Publication number: 20180350531
    Abstract: A contact lever for use in an electrical switch assembly so as to allow selectable movement within the switch assembly of a contact lever contact member from electrical connection with a first stationary contact member into electrical connection with a second stationary contact member, the contact lever including: first and second lever arms that are connected at respective first ends to the contact lever contact member; said first and second lever arms having respective second ends, and, said first and second lever arms being configured to extend away from the contact member and to terminate at their respective second ends; a gap disposed between the first and second lever arms which separates the first and second lever arms as they extend away from the contact member, and wherein the gap is configured to allow movement of a spring element of the switch assembly therethrough; and a bridge member configured for connection with the first and second lever arms so as to traverse the gap separating the first and
    Type: Application
    Filed: January 12, 2018
    Publication date: December 6, 2018
    Inventor: Kin Yu Wong
  • Publication number: 20180175647
    Abstract: A battery pack system for use in connecting a battery pack to a battery pack receiving member of a machine so that the battery pack is operable to supply a suitable amount of power to the machine for operation of the machine via an electrical circuit path that is configurable for electrically connecting the battery pack to the machine, the system including: a first electrical connector member disposed along a first region of the electrical circuit path; and a second electrical connector member; wherein, responsive to the battery pack being connected to the battery pack receiving member of the machine, the second electrical connector member is configured for movement relative to the first electrical connector member to cooperatively form a first configuration which electrically closes the electrical circuit path via which the suitable amount of power is able to be supplied from the battery pack to the machine; and wherein, responsive to the battery pack being disconnected from the battery pack receiving member
    Type: Application
    Filed: November 8, 2017
    Publication date: June 21, 2018
    Inventors: Tak Chuen OR, Cheng Chen NIEH, Kin Yu WONG
  • Publication number: 20180144888
    Abstract: A sealing assembly for prevention of ingress of particulates and water into an electrical switch includes an engagement element with a rigid first abutment portion for circumscribing an aperture extending through the outer surface of the switch housing and a rigid first retention portion. Also included is a sealing element being slidingly engageable with the engagement element that includes a first complementary abutment portion. The sealing element is formed from an elastically resilient polymeric material so that sealing engagement with the engagement element occludes passage and ingress of external particulates, dust and water.
    Type: Application
    Filed: October 10, 2017
    Publication date: May 24, 2018
    Inventor: Kin Yu WONG