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公开(公告)号：US20240372488A1
公开(公告)日：2024-11-07
申请号：US18772975
申请日：2024-07-15
Applicant: Snap-on Incorporated
Inventor： Michael Rajzer , Jason Genz
Abstract: A two-stage braking method for a brushless DC (BLDC) motor. The method includes control a switching array to drive the BLDC motor according to a commutation scheme to decrease a speed of the BLDC motor, allow the BLDC motor to coast, determine the speed of the BLDC motor, and actuate high side switches and/or low side switches to substantially stop rotational movement of the BLDC motor.
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公开(公告)号：US11929698B2
公开(公告)日：2024-03-12
申请号：US17694249
申请日：2022-03-14
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz
IPC: G01R31/34 , B25B21/00 , H02K7/14 , H02P29/024
CPC classification number: H02P29/024 , B25B21/004 , G01R31/343 , H02K7/145
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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公开(公告)号：US11819984B2
公开(公告)日：2023-11-21
申请号：US17462999
申请日：2021-08-31
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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Patent Agency Ranking
公开(公告)号：US11689124B2
公开(公告)日：2023-06-27
申请号：US17147205
申请日：2021-01-12
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz
CPC classification number: H02P6/12 , B25F5/02 , B25B21/004 , H02P2205/03
Abstract: A computer implemented method for controlling commutation of a brushless DC (BLDC) motor. The method includes controlling a switching array to drive the BLDC motor at a first commutation, receiving and monitoring power consumption signals indicating power consumption of the BLDC motor, determining whether the power consumption exceeds a first threshold value, and controlling the switching array to drive the BLDC motor at a second commutation when the power consumption exceeds the first threshold value.
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公开(公告)号：US20220305603A1
公开(公告)日：2022-09-29
申请号：US17694218
申请日：2022-03-14
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz , David A. Cyborski , Jeremy Zorns , Christoffer S. Fox , Patrick F. Healy
Abstract: The present invention relates to a motor timeout of a power tool. When a trigger of the tool is unintentionally actuated, power is provided to a motor of the tool to cause an output assembly of the tool to operate. This can be problematic when the tool is being stored. To address this situation, the tool initiates or starts a motor timer when the motor is running at any nonzero speed. If the trigger remains continuously actuated, with the motor running at any nonzero speed, and the motor timer reaches a threshold limit, the tool ceases or discontinues to allow power to be provided to the motor, thereby shutting off the motor. This reduces the power source from being unintentionally discharged, and the chance of the tool creating a situation where the output assembly can unintentionally cause damage to the storage mechanism or other surroundings.
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公开(公告)号：US11412631B2
公开(公告)日：2022-08-09
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：US20220088753A1
公开(公告)日：2022-03-24
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
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：US20210399611A1
公开(公告)日：2021-12-23
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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