Abstract: According to one aspect, an electric toothbrush may include a handle, a brush head, a rechargeable battery, an electric motor, and a pair of electrical contacts. The handle may have a first end region and a second end region defining a longitudinal axis therebetween, the handle defining a volume from the first end region to the second end region. The brush head may include bristles, the brush head releasably securable to the first end region of the handle. The rechargeable battery may be in the volume. The electric motor may be at least partially disposed in the volume, the electric motor in electrical communication with the rechargeable battery, the electric motor in mechanical communication with the brush head. The pair of electrical contacts may be in electrical communication with the rechargeable battery, and the pair of electrical contacts axially and radially spaced from one another, relative to the longitudinal axis.

Abstract: Devices, systems, and methods of the present disclosure are generally directed to facilitating user control of high-pressure flow of liquid for oral irrigation carried out as part of personal dental care. Such control over high-pressure flow may reduce the likelihood of errant spray of liquid outside of the user's mouth (e.g., onto mirrors, countertop surfaces, or the user's clothes). Such improved control over errant spraying may reduce the potential for frustration and, thus, may promote maintaining oral irrigation as part of a personal dental care routine. Further, or instead, through facilitating user control of high-pressure flow of liquid, the devices, systems, and methods of the present disclosure may improve the effectiveness and efficiency of self-administered oral irrigation in promoting a user's oral hygiene.

Abstract: An in-line accessory (10) for use with a self-contained breathing apparatus (SCBA) system (12) and associated method include a hardware form factor comprising an opening (42); a first connection interface (30) on the hardware form factor configured to selectively connect with a connection interface on a regulator (16) of the SCBA system (12); a second connection interface (32) on the hardware form factor configured to selectively connect with a connection interface on a mask (14) of the SCBA system (12); and circuitry disposed on and/or within the hardware form factor to perform and add one or more functions to the SCBA system (12); wherein the hardware form factor is disposed between the regulator (16) and the mask (14) in a non-obtrusive manner in the SCBA system (12) and the opening (42) supports air flow from the regulator (16) to the mask (14).