Abstract: The dermatome includes a blade assembly comprising a metal blade with fixedly attached thermoplastic carrier. The assembly is releasably mounted to the dermatome housing. A linear drive mechanism-that includes guide members and spring biasing of the blade assembly ensures linear, reciprocating blade movement that prolongs blade life. The linear drive mechanism is housed in a manner that facilitates cleaning and sterilization of the dermatome.

Abstract: A dry shaver includes a perforated outer shearing foil and an inner cutter. The outer shearing foil has a first axis along which it is arcuately curved. The inner cutter has a longitudinal axis along which it is arcuately curved to have an arcuate contour in conformity with the outer shearing foil and is driven to reciprocate in hair shearing engagement with the outer shearing foil. The inner cutter comprises a plurality of inner blades which are spaced along the longitudinal axis in parallel relation to each other, each of the blades having opposed first and second faces each defining a cutting edge at its upper end so that the individual cutting edges are cooperative to define the arcuate contour. Each inner blade, which is offset from a longitudinal center of the inner cutter, is formed with a first face directing outwardly in the offset direction with an undercut immediately adjacent to the cutting edge. The undercut cooperates with the adjacent cutting edge to give an first rake angle .beta.

Abstract: An electric shaver (1) is provided comprising a housing (2), a shaving head (5) comprising a shaving foil (7) and a cutter assembly (8) with cutter lamellae (19), and a motor (23) of the rotary type as well as a transmission mechanism (31) acting between the motor (23) and the cutter assembly (8) in order to convert the rotation of the motor shaft (30) into a reciprocating movement to the drive a cutter assembly (8), the motor (23) having a nominal operating speed between 8000 and 10,000 revolutions per minute, wherein the motor (23) is covered with a sheath (32) of an elastic material, the transmission mechanism (31) comprises at least one balancing mass (52), and each of the cutter lamellae (19) of the cutter assembly (8) is provided with an indentation (57, 58) in each of its two side faces (55, 56) which are each bounded by a cutting edge (53, 54), which indentation extends parallel to the cutting edge (53, 54), and exhibits a cutting angle (.beta.) smaller than 90.degree.

Abstract: A reciprocating type electric shaver comprises an inner-blade mount holding many inner blades and connected to a first driver-element converting rotary motion of a motor into reciprocating motions and an outer blade connected to a second driver-element reciprocated at a mechanical phase reverse to the first driver-element so that the inner blades and outer blade can slidably engage with each other mutually at mechanically reverse phase and the relative momentum of the outer blade with respect to the inner blades can be enlarged.

Abstract: An electric razor is disclosed which comprises a housing having a shearing head, a shearing comb disposed within the head and having openings permitting hair protruding from a surface to enter into an interior of the comb, and a blade beam carrier which mounts an elongated blade beam and which is oscillated relative to the comb for severing hair extending through the comb openings. A connecting member driven by an electric motor engages and oscillates the blade beam. A reduction drive is provided for oscillating the shearing comb at a lesser frequency than the blade beam in generally three directions, a first direction substantially parallel to the oscillating direction of the blade beam, a second direction which is transverse thereto, and a third direction which lifts the shearing comb off the skin being shaved.

Abstract: A hair clipper is arranged to alleviate one cause of pseudofolliculitis. The hair clipper comprises a motor for reciprocally moving a first cutter against low-lying facial hairs causing these hairs to become erect for cutting above the skin line between the moving first cutter and a stationary second cutter.

Abstract: An electric razor is disclosed herein having a case housing an electric motor and a gear driving train operably coupled to a moving cutting head. The head includes at least one cutting blade driven by the motor either in a back and forth stroking manner or in a rotary motion. The cutting head is movably carried on the case by an oscillating plate driven by the gear train so that the entire cutting head including the cutting blade or blades moves while the cutting blade or blades are driven in their stroking or rotary movement. Tension rollers are provided about the periphery of the oscillating plate engageable with the skin of the user for stretching the skin to expose more of the hair shaft preparatory for cutting.