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).
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Patent number: 11823856Abstract: 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: GrantFiled: December 11, 2020Date of Patent: November 21, 2023Assignees: DEFOND COMPONENTS LIMITED, DEFOND ELECTECH CO., LTD.Inventor: Kin Yu Wong
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Patent number: 11651915Abstract: 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: GrantFiled: January 13, 2022Date of Patent: May 16, 2023Assignee: DEFOND ELECTECH CO., LTDInventor: Kin Yu Wong
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Publication number: 20220254578Abstract: 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: ApplicationFiled: January 27, 2022Publication date: August 11, 2022Inventor: Kin Yu Wong
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Publication number: 20220246373Abstract: 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: ApplicationFiled: January 13, 2022Publication date: August 4, 2022Inventor: KIN YU WONG
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Patent number: 11367577Abstract: 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: GrantFiled: January 3, 2020Date of Patent: June 21, 2022Assignees: DEFOND ELECTECH CO., LTD, DEFOND COMPONENTS LIMITEDInventor: Kin Yu Wong
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Patent number: 11257639Abstract: 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 seaType: GrantFiled: December 6, 2019Date of Patent: February 22, 2022Assignees: Defond Electech Co., Ltd, Defond Components LimitedInventor: Kin Yu Wong
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Publication number: 20210183604Abstract: 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 aType: ApplicationFiled: December 11, 2020Publication date: June 17, 2021Inventor: Kin Yu WONG
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Patent number: 10978257Abstract: 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: GrantFiled: July 8, 2020Date of Patent: April 13, 2021Assignees: DEFOND COMPONENTS LIMITED, DEFOND ELECTECH CO., LTDInventors: Cheng Chen Nieh, Kin Yu Wong, Lap Yi Law
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Patent number: 10965133Abstract: 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 memberType: GrantFiled: November 8, 2017Date of Patent: March 30, 2021Assignees: Defond Electech Co., Ltd., Defond Components LimitedInventors: Tak Chuen Or, Cheng Chen Nieh, Kin Yu Wong
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Publication number: 20210012980Abstract: 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: ApplicationFiled: July 8, 2020Publication date: January 14, 2021Inventors: Cheng Chen NIEH, Kin Yu WONG, Lap Yi LAW
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Publication number: 20200219675Abstract: 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 selectaType: ApplicationFiled: January 3, 2020Publication date: July 9, 2020Inventor: Kin Yu WONG
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Patent number: 10685795Abstract: 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: GrantFiled: August 24, 2018Date of Patent: June 16, 2020Assignees: DEFOND ELECTECH CO. LTD., DEFOND COMPONENTS LIMITEDInventor: Kin Yu Wong
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Publication number: 20200185167Abstract: 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 sType: ApplicationFiled: December 6, 2019Publication date: June 11, 2020Inventor: Kin Yu Wong
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Publication number: 20200090886Abstract: 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: ApplicationFiled: November 20, 2019Publication date: March 19, 2020Applicants: Defond Electech Co., Ltd., Defond Components LimitedInventor: Kin Yu WONG
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Patent number: 10497523Abstract: 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: GrantFiled: October 10, 2017Date of Patent: December 3, 2019Assignees: Defond Electech Co., Ltd., Defond Components LimitedInventor: Kin Yu Wong
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Patent number: 10418195Abstract: 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 andType: GrantFiled: January 12, 2018Date of Patent: September 17, 2019Assignee: Defond Electech Co., LtdInventor: Kin Yu Wong
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Publication number: 20190198270Abstract: 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: ApplicationFiled: August 24, 2018Publication date: June 27, 2019Inventor: Kin Yu Wong
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Publication number: 20180350531Abstract: 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 andType: ApplicationFiled: January 12, 2018Publication date: December 6, 2018Inventor: Kin Yu Wong
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Publication number: 20180175647Abstract: 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 memberType: ApplicationFiled: November 8, 2017Publication date: June 21, 2018Inventors: Tak Chuen OR, Cheng Chen NIEH, Kin Yu WONG
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Publication number: 20180144888Abstract: 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: ApplicationFiled: October 10, 2017Publication date: May 24, 2018Inventor: Kin Yu WONG