Abstract: A leash control device includes: a housing including a top cover and a bottom cover rigidly connected to the top cover; a cable wheel including a cylindrical outer ring, the cylindrical outer ring being configured for a leash cable to be wounded on an outer surface of the cylindrical outer ring; a button having a cylindrical member configured on an upper portion of the button and a base configured on a lower portion of the button, the cylindrical member being configured to be extended through a central hole of the top cover; and a compression spring configured to bias the button in an upward direction to cause the button to engage with the cable wheel; wherein: when a pressing force is applied to the cylindrical member of the button to counter an upward biasing force of the compression spring and no pulling force is applied to the leash cable, the button is configured to be pressed down and disengaged from the cable wheel, and after the button is disengaged from the cable wheel, the cable wheel is configured

Abstract: A leash control device includes: a housing including a top cover and a bottom cover rigidly connected to the top cover; a cable wheel including a cylindrical outer ring, the cylindrical outer ring being configured for a leash cable to be wounded on an outer surface of the cylindrical outer ring; a button having a cylindrical member configured on an upper portion of the button and a base configured on a lower portion of the button, the cylindrical member being configured to be extended through a central hole of the top cover; and a compression string configured to bias the button in an upward direction to cause the button to engage with the cable wheel; wherein: when a pressing force is applied to the cylindrical member of the button to counter an upward biasing force of the compression string and no pulling force is applied to the leash cable, the button is configured to be pressed down and disengaged from the cable wheel, and after the button is disengaged from the cable wheel, the cable wheel is configured

Abstract: A battery module includes a housing that defines an inner volume and includes an airflow path from an aperture formed in a first end member of the housing, through the inner volume, and to an aperture formed in a second end member of the housing; a plurality of power cells mounted in the inner volume of the housing, each of the power cells including a vent member at an end of the power cell; and a flame arrestor mounted across the airflow path and between the plurality of power cells and the aperture formed in the second end member of the housing. The flame arrestor includes a screen that includes a plurality of fluid pathways sized to allow an airflow from the airflow path through the fluid pathways and sized to impede a combusted fluid to pass therethrough.