Abstract: A motorized wagon system according to the present disclosure includes a frame, a base coupled to the frame, a first wheel set and a second wheel set connected to the base, a handle connected to the frame, and a control system. The control system includes a first sensor and a second sensor configured to measure two forces applied on different portions of the handle. The control system further includes a controller that controls the first wheel set based on measurements of the first sensor and the second wheel set based on measurements of the second sensor.

Abstract: Heating units for heating hair rollers are provided, as well as rollers for use therewith. An exemplary heating unit includes a housing having a lid and a lower portion, with a first magnetic core disposed within the lower portion and a second magnetic core disposed within the lid. The first magnetic core includes two parallel legs, and a plurality of conductive windings wound around one of the two legs. When the housing is closed the first and second magnetic cores together form a square closed core. When energized, the windings generate a magnetic field within the square closed core that induces an electric current in a roller disposed around the second of the two legs. An exemplary roller for use with the heating unit comprises a conductive cylinder, such as aluminum, having a diameter of at least two inches and including bristles protruding perpendicular to the exterior surface.

Abstract: A motorized wagon system according to the present disclosure includes a frame, a base coupled to the frame, a first wheel set and a second wheel set connected to the base, a handle connected to the frame, and a control system. The control system includes a first sensor and a second sensor configured to measure two forces applied on different portions of the handle. The control system further includes a controller that controls the first wheel set based on measurements of the first sensor and the second wheel set based on measurements of the second sensor.

Abstract: A handgrip for use with a dumbbell is provided. The dumbbell includes a handgrip top and a handgrip bottom that are connected with a handgrip hinge. A dumbbell is secured within the handgrip by placing the handle of the dumbbell into a bottom foam engagement structure in the handgrip bottom, then the handgrip top is rotated into contact with the handgrip bottom using the handgrip hinge until the handgrip reaches a closed position wherein the handgrip top is in contact with the handgrip bottom. In the closed position, a top foam engagement structure of the handgrip top is also engaging the handle of the dumbbell and opposing magnets positioned in the handgrip top and handgrip bottom magnetically engage each other to help keep the handgrip in the closed position.