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公开(公告)号：US20240033885A1
公开(公告)日：2024-02-01
申请号：US18378036
申请日：2023-10-09
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz , Craig Brouwers , Joshua M. Beer
CPC classification number: B25B23/18 , B25B21/004 , F21V5/046 , F21V23/005 , F21V33/0084 , F21Y2115/10
Abstract: An illumination source disposed in a housing of a tool without the need for fasteners or snaps. The illumination source includes a number illumination elements, such as LEDs, disposed on a circuit board. A lens and the housing cooperatively direct light emitted by the illumination elements away from a user's eyes during use of the tool.
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公开(公告)号：US20220071041A1
公开(公告)日：2022-03-03
申请号：US17003440
申请日：2020-08-26
Applicant: Snap-on Incorporated
Inventor： Jason Genz , Michael T. Rajzer , Craig Brouwers , Joshua M. Beer
Abstract: A printed circuit board (PCB) for motor and display control of a tool. The PCB is disposed within a housing portion of the tool substantially perpendicular to a display assembly of the tool. The PCB includes integrated switches adapted to engage corresponding buttons of the display assembly. The housing portion and display assembly including features to restrict movement of the PCB relative to the housing portion.
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公开(公告)号：US20240388226A1
公开(公告)日：2024-11-21
申请号：US18789892
申请日：2024-07-31
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz , Daniel Nitzsche
Abstract: The present invention relates broadly to commutation control of a BLDC motor for use with, for example, a power tool. The method uses a controller to control a BLDC motor in the event of a position sensor failure. Rather than ceasing operation of the motor and indicating a fault or error message to the user, the present invention determines when the next transition should occur based on the time between past hall transitions using a timer. Thus, if one or two position sensors are no longer providing position information to the controller, the controller can determine when the transitions would be changing based on past transitions to continue controlling the motor and prevents the motor from ceasing operation.
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公开(公告)号：US11658545B2
公开(公告)日：2023-05-23
申请号：US16906320
申请日：2020-06-19
Applicant: Snap-on Incorporated
Inventor： Isidro Alanis , Jason Genz , Michael Rajzer
Abstract: An end cap for a brushless motor that dissipates heat from a controller and switching elements of the motor through fins in the end cap. The end cap can be directly or thermally coupled to the controller and switching elements to dissipate heat out through the fins.
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公开(公告)号：US20220311372A1
公开(公告)日：2022-09-29
申请号：US17694249
申请日：2022-03-14
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz
IPC: H02P29/024 , B25B21/00 , G01R31/34 , H02K7/14
Abstract: The present invention relates to switching element protection of a BLDC motor, such as used with a power tool. The present invention checks each switching element of a power stage individually for a short circuit when a trigger of the tool is actuated. Each switching element is turned ON for a period of time (such as 1-5 microseconds, for example), current flowing through the half-bridge or the full power stage is measured, and that switching element is turned OFF. When the current is greater than or equal to a threshold (such as 5 A, for example), the controller stops and indicates a fault condition. By testing each switching element in order, the controller is able to determine whether the shorted switching element is the opposite one in the half-bridge being tested.
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Patent Agency Ranking
公开(公告)号：US20220219297A1
公开(公告)日：2022-07-14
申请号：US17144777
申请日：2021-01-08
Applicant: Snap-on Incorporated
Inventor： Joshua M. Beer , Jason Genz , Michael T. Rajzer , Craig Brouwers
IPC: B25B23/142 , B25B23/16
Abstract: A display housing assembly has a base, a lens, and buttons. The base, lens, and buttons may be shaped to correspond with an external geometry of a tool housing, such as, for example, curved, arcuate or cylindrically shaped. The display housing assembly may also be assembled by molding the lens, molding the base over the lens, and molding the buttons over the base.
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公开(公告)号：US12095402B2
公开(公告)日：2024-09-17
申请号：US17694228
申请日：2022-03-14
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz , Daniel Nitzsche
IPC: H02P29/028 , B25B21/00 , H02P6/12 , H02P6/15 , H02P6/16
CPC classification number: H02P6/12 , B25B21/004 , H02P6/15 , H02P6/16
Abstract: The present invention relates broadly to commutation control of a BLDC motor for use with, for example, a power tool. The method uses a controller to control a BLDC motor in the event of a position sensor failure. Rather than ceasing operation of the motor and indicating a fault or error message to the user, the present invention determines when the next transition should occur based on the time between past hall transitions using a timer. Thus, if one or two position sensors are no longer providing position information to the controller, the controller can determine when the transitions would be changing based on past transitions to continue controlling the motor and prevents the motor from ceasing operation.
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公开(公告)号：US12090606B2
公开(公告)日：2024-09-17
申请号：US17028054
申请日：2020-09-22
Applicant: Snap-on Incorporated
Inventor： Joshua M. Beer , Jason Genz , Craig Brouwers , Michael T. Rajzer
IPC: B25B21/00
CPC classification number: B25B21/004
Abstract: The present invention relates to a motorized hand tool having a motor with a motor front casing adapted to resist rotation of the motor with respect to a housing of the tool, without use of extra fasteners or machining operations. The motor front casing includes first and second flanges and first and second tabs that protrude radially outwardly and that are disposed proximal to respective ends of the flanges. When the motor is installed, the tabs abut a ratchet head housing and are sandwiched between the ratchet head housing and a rib if a tool housing to resist motor rotation and ensure all forces are distributed across a whole face of the rib to minimize deformation of the rib and/or tool housing.
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公开(公告)号：US20220311365A1
公开(公告)日：2022-09-29
申请号：US17694260
申请日：2022-03-14
Applicant: Snap-on Incorporated
Inventor： Jason Genz , Michael T. Rajzer , Christoffer S. Fox , Daniel Nitzsche
IPC: H02P6/15
Abstract: The present invention relates to a method of commutation control of a BLDC motor. The method uses a controller to control the BLDC motor using a modified six-step commutation. The method adds six intermediate steps that overlap the six-step commutation. Each of the six steps overlap with preceding and following steps, resulting in six additional intermediate steps in which all three phases are active. By doubling the number of steps, current and torque will vary less over time compared with current solutions without increasing the size or changing the design of the motor.
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公开(公告)号：US20220311364A1
公开(公告)日：2022-09-29
申请号：US17694228
申请日：2022-03-14
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz , Daniel Nitzsche
Abstract: The present invention relates broadly to commutation control of a BLDC motor for use with, for example, a power tool. The method uses a controller to control a BLDC motor in the event of a position sensor failure. Rather than ceasing operation of the motor and indicating a fault or error message to the user, the present invention determines when the next transition should occur based on the time between past hall transitions using a timer. Thus, if one or two position sensors are no longer providing position information to the controller, the controller can determine when the transitions would be changing based on past transitions to continue controlling the motor and prevents the motor from ceasing operation.
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