Abstract: A razor for shaving hair from the skin of a user includes a rotating blade assembly connected so as to be rotated by a drive mechanism. The blade assembly includes a generally cylindrical roller rotatably mounted along its longitudinal axis, at least one blade mounted on, and extending along a major part of, the roller, and a guide element associated with each blade. The blade and the guide element are configured to form a safety blade such that, when the blade assembly rotates in direct contact with the skin, the at least one blade shaves hair from the skin without cutting the skin. Preferably, the razor includes two similar blade assemblies rotated by the drive mechanism in opposing directions so as to apply stretching tension to the skin of the user. Also described are a number of safety blade configurations relevant to both manual and power driven exposed-blade razors.

Abstract: A razor cartridge employs a number of planar blades, each having an uninterrupted upper surface and a width measured across its upper surface perpendicular to its length of no more than about 4 mm. The blades are retained between abutment features provided by spaced-apart ribs of a base and opposing abutment surfaces of a cover. Also provided is method for assembling such cartridges by temporarily inserting locating elements through apertures formed either in the base or in the cover.

Abstract: A razor for shaving hair from the skin of a user includes a rotating blade assembly connected so as to be rotated by a drive mechanism. The blade assembly includes a generally cylindrical roller rotatably mounted along its longitudinal axis, at least one blade mounted on, and extending along a major part of, the roller, and a guide element associated with each blade. The blade and the guide element are configured to form a safety blade such that, when the blade assembly rotates in direct contact with the skin, the at least one blade shaves hair from the skin without cutting the skin. Preferably, the razor includes two similar blade assemblies rotated by the drive mechanism in opposing directions so as to apply stretching tension to the skin of the user. Also described are a number of safety blade configurations relevant to both manual and power driven exposed-blade razors.

Abstract: A blade assembly for use in a razor has at least one blade providing a cutting edge, a leading skin guide located ahead of the cutting edge, and a trailing skin guide located behind the cutting edge. The leading and trailing skin guides are configured to provide one or more front contact surface and one or more rear contact surface, respectively, for contacting the skin of a user. These front and rear contact surfaces lie substantially on a virtual convexly-curved contact profile such that, when the blade assembly is pressed against the skin of a user, the skin becomes stretched to conform to the contact profile.

Abstract: An apparatus for treating hair comprises a motor, a housing engaging the housing, and a pair of combs, each comb movably engaged by the housing. A mechanism comprising two arms is engaged by the housing with each arm operably connected between one of the combs and the motor so as to force each comb to reciprocate substantially perpendicular to their longitudinal axis so as to cause the teeth of each comb to reciprocally cross back-and-forth, over and between the teeth of the other comb member. The apparatus can be used for detangling hair, removing parasites such as lice, and/or removing particles such as dandruff.