A formula delivery appliance generally includes a formula delivery head having features to mix, direct, and distribute formulation through nozzles to a desired location, such as the hair or scalp of a user. In this regard, the formula delivery head may include a plurality of nozzles configured to discharge the formulation at a desired flow rate. In some instances, the flow rate across the plurality of nozzles is controlled such that each nozzle has a flow rate within a specified percentage of the average flow rate across the plurality of nozzles.

A formula delivery system can be used in conjunction with hair and scalp treatment appliances to supply a hair treatment formulation to the appliance. In one aspect, the formula delivery system delivers hair coloring formulation to the appliance. Formula delivery systems of the present disclosure generally include at least one fluid container configured to retain a volume of formulation for delivery of the formulation to a hair coloring appliance. In this regard, the formula delivery system may be configured to removably couple to an inlet member of the appliance that allows the appliance to draw the formulation from the fluid container for use within the appliance.

A drive shaft coupling is provided, such as a coupling used with a formula delivery appliance. The drive shaft coupling generally includes a drive gear and a driven gear, with one of the drive gear and driven gear having a biasing member to allow axial translation. The drive shaft coupling is generally configured to transfer rotation from the drive gear to the driven gear. In one aspect, the drive shaft coupling is capable of alignment and coupling of the drive gear and driven gear upon the radial sliding of the coupling from a non-engagement position to an engagement position.

A system is provided that includes a hair dryer and a hairbrush. The hairbrush is configured to sense a characteristic of at least one of the user's hair and the hair dryer, and to transmit information back to the hair dryer based on the sensed characteristic. The hair dryer is configured to update at least one setting, which may include least one of temperature control, air flow speed, and air flow shape at the hair dryer, based on the received sensed characteristic.

A system is provided that includes a hair dryer and a hairbrush. The hairbrush is configured to sense a characteristic of at least one of the user's hair and the hair dryer, and to transmit information back to the hair dryer based on the sensed characteristic. The hair dryer is configured to update at least one setting, which may include least one of temperature control, air flow speed, and air flow shape at the hair dryer, based on the received sensed characteristic.

An integrated enhanced grip and toothbrush consisting of an elongated contoured handle portion with an extending toothbrush in its preferred form. The handle has a plurality of finger engagement openings of flexible yieldable material in a linearly aligned spaced opposition providing for a no slip secure finger retainment for individuals with impaired or limited hand motor skills.

A hair brush has a semi-circular configuration, and has a head having a support member with a plurality of apertures therein that accommodate a plurality of bristles each having a hollow therein, and has a rear having an elongated hollow therein that complements the semi-circular configuration. When air is applied to the bristles, each bristle communicates with the aperture so that air can flow through the openings of the bristles, the aperture and outward through the hollow in the rear of the hair brush and away from the hair of a user. When air is applied to the hollow in the rear, the air is directed through the apertures and bristles onto the hair of the user.

A hair brush has a semi-circular configuration, and has a head having a support member with a plurality of apertures therein that accommodate a plurality of bristles each having a hollow therein, and has a rear having an elongated hollow therein that complements the semi-circular configuration. When air is applied to the bristles, each bristle communicates with the aperture so that air can flow through the openings of the bristles, the aperture and outward through the hollow in the rear of the hair brush and away from the hair of a user. When air is applied to the hollow in the rear, the air is directed through the apertures and bristles onto the hair of the user.

A hair styling device comprising: a styling substrate; and a coating disposed onto the styling substrate, the coating including: one or more ceramic minerals, and one or more graphene materials in a sufficient amount so that the coating has a thermal conductivity of about 7 Watts/(meter.Math.Kelvin).

A computer-implemented method for generating feedback for a user performing haircare includes receiving a sequence of images of a head of the user and a haircare implement, the haircare implement being a hairstyling implement. The computer-implemented method also includes determining one or more implement motion parameters by tracking a position or an orientation of the haircare implement using the sequence of images. The computer-implemented method also includes determining a detangling event if one or more of: linear velocity, angular velocity, linear acceleration, and angular acceleration of the haircare implement is less than a corresponding detangling motion threshold, the detangling event being an event in which tangles from hair of the user are being removed. The computer-implemented method also includes generating feedback for providing to the user based on the determined detangling event.