Abstract: A pool cleaning robot for cleaning a pool, that may include a housing; a first interfacing element is configured to interface between the pool cleaning robot and a bottom of a pool while the pool cleaning robot cleans the bottom of the pool; and one or more second interfacing elements that are configured to reduce a friction between the pool and the pool cleaning robot during at least a portion of an exit process in which the pool cleaning robot exits the pool.

Abstract: A self-propelled, dust-collecting robot includes a chassis, an electric motor supported by the chassis, and first and second rechargeable battery packs disposed inside the chassis for supplying current to the electric motor. First and second castors are respectively disposed immediately underneath the first and second battery packs. Each of the battery packs has a pair of rails that respectively slide into and engage with complementary guide rails coupled to the chassis. A dust-collection box is removably disposed within the chassis. A dust-collection motor rotates a suction fan that is in fluid communication with the dust-collection box. At least one rotatable brush sweeps dust towards a suction port in fluid communication with the dust-collection box.

Abstract: An attachment mountable to an electric toothbrush handle having a drive shaft comprises a neck member having an elongated body with a principal axis and a cavity; a slide member with an engagement surface; a guide sleeve member having a cavity, a first outer surface with an engagement opening, and a transition surface; and a collar member. The guide sleeve member, with slide member inserted within the engagement opening, is inserted within the neck member cavity. Insertion of the drive shaft into the collar member and guide sleeve member from a first radial position along an axis offset and parallel to the principal axis to a second radial position in-line with the principal axis, via the transition surface, results in the drive shaft being held in frictional contact with the engagement surface of the slide member to enable transfer of force/motion from the drive shaft to the neck member.