Abstract: A system and method for balancing flows of renal replacement fluid is disclosed. The method uses pressure controls and pressure sensing devices to more precisely meter and balance the flow of fresh dialysate and spent dialysate. The balancing system may use one or two balancing devices, such as a balance tube, a tortuous path, or a balance chamber.

Abstract: A rotary power tool includes a housing having a motor housing portion and a handle extending from the housing. An electric motor is disposed within the motor housing portion. The rotary power tool further includes a trigger switch configured to activate and deactivate the motor, a plurality of lighting elements configured to be activated in response to actuation of the trigger switch, and a brightness control unit positioned on the housing. The brightness control unit is configured to adjust the lighting elements between a plurality of different brightness states other than an “ON” state or an “OFF” state.

Abstract: A rotary power tool includes a housing having a motor housing portion and a handle extending from the housing. An electric motor is disposed within the motor housing portion. The rotary power tool further includes a trigger switch configured to activate and deactivate the motor, a plurality of lighting elements configured to be activated in response to actuation of the trigger switch, and a brightness control unit positioned on the housing. The brightness control unit is configured to adjust the lighting elements between a plurality of different brightness states other than an “ON” state or an “OFF” state.

Abstract: A power tool including a motor configured to rotatably drive an output shaft, a variable motor speed control input, a motor speed limit input, and a motor controller. The motor controller includes an electronic processor and a memory configured to store instructions. When executed by the motor controller, the instructions configure the motor controller to detect a motor speed limit from a setting of the motor speed limit input, and detect a variable speed control setting from the variable motor speed control input. The motor controller generates a motor speed control signal for driving the motor based on the detected motor speed limit and the detected variable motor speed control setting, and transmits the motor speed control signal to a motor driver circuit configured to drive the motor at a speed based on the motor speed control signal.