Cutter assemblies for electric shavers
OwnerMoshe Dolevinventor
Life of this patent
Estimating the term…
Abstract
A cutter assembly for use in a shaver for shaving hair from the skin of a user includes a casing formed with a static blade configuration and a static bearing surface removed from the static blade configuration. Mounted within the casing is a moving cutter, which has a number of blades and a bearing surface formed to complement the static bearing surface. A spring element biases the moving cutter against the casing so that the complementary bearing surface slides against the static bearing surface, this sliding corresponding to a shearing cutting action of the moving blades relative to the static blade configuration. This reduces the frictional heating between the blades. Also described is a static blade configuration in which extended open-ended slots are reinforcement by transverse support ribs.
Claims17
A cutter assembly for use in a shaver for shaving hair from the skin of a user, the cutter assembly comprising:
- (a) a casing formed with a static blade configuration having a front surface for contacting the skin of the user and a rear surface, said casing being further formed with at least one static bearing surface removed from said static blade configuration;
- (b) a moving cutter having a plurality of blades and at least one complementary bearing surface formed to complement said at least one static bearing surface;
- and
- (c) a spring element configured to bias said moving cutter against said casing such that said at least one complementary bearing surface is in sliding engagement with said at least one static bearing surface,
- wherein sliding of said at least one complementary bearing surface against said at least one static bearing surface generates a shearing cutting action of said plurality of blades relative to said static blade configuration.
A static blade configuration for use in a electric shaver for shaving hair from the skin of a user, the static blade configuration comprising:
- (a) an outer layer of thickness h and providing a front skin contact surface and a rear cutting surface, said outer layer being formed with a plurality of parallel slots extending through the entirety of thickness h and elongated in a first direction;
- and
- (b) at least one elongated support rib integrally formed with, or attached to, said rear cutting surface of said outer layer, said support rib being elongated in a second direction substantially perpendicular to said first direction.
A cutter assembly for use in a shaver for shaving hair from the skin of a user, the cutter assembly comprising:
- (a) a casing formed with a static blade configuration having a front surface for contacting the skin of the user and a rear surface, said static blade configuration being formed with a plurality of parallel slots;
- and
- (b) a moving cutter having a plurality of blades and configured for mounting rotatably relative to said casing so as to be rotatable about a virtual axis substantially parallel to said front surface, said plurality of blades being configured to provide a shearing cutting action relative to said static blade configuration, wherein said plurality of slots are elongated in a direction substantially parallel to said virtual axis,
- wherein said moving cutter features a lead cutter associated with each blade of said plurality of blades, said lead cutter being slidingly mounted relative to said blade so as to be slidable between a leading position in close proximity to said rear surface of said static blade configuration and a lifter position raised away from said rear surface, rotation of said moving cutter generating centrifugal effects so as to bias said lead cutter towards said leading position.
A cutter assembly for use in a shaver for shaving hair from the skin of a user, the cutter assembly comprising:
- (a) a casing formed with a static blade configuration having a front surface for contacting the skin of the user and a rear surface, said casing being further formed with at least one abutment surface;
- (b) at least one bushing configured to said at least one abutment surface and providing a static bearing aperture;
- (c) a moving cutter having a plurality of blades and at least one complementary bearing surface configured to be mounted rotatably within said static bearing aperture, and
- (d) a spring element configured to bias said bushing into abutment with said abutment surface of said casing,
- wherein rotation of said at least one complementary bearing surface within said static bearing aperture generates a shearing cutting action of said plurality of blades relative to said static blade configuration.
Dependencies are inferred from the claim text.