US 7,743,507 B2Granted

Rotary type electric shaver

AssigneeIzumi Products Company

InventorTsuyoshi Nakano

Life of this patent

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Abstract

A rotary type electric shaver with an outer cutter frame provided on a shaver main body. An outer cutter installed in this outer cutter frame and having its shaving surface on the upper surface of a ring-shaped thin layer portion. An inner cutter 16 having a cutter body that rotates and makes sliding contact from below with the lower surface of the outer cutter 14, wherein a thin layer portion 28 is formed in a substantially arc shape that is convex upward in a radial and vertical cross section that includes a center axis line which is the rotational center of the inner cutter. The thickness of the thin layer portion near the apex of the upward convex is smallest at the apex and gradually becomes thicker as distance increases away from the apex.

Claims1

Dependent claims

A rotary type electric shaver comprising an outer cutter frame tat is provided on a shaver main body, an outer cutter that is installed in said outer cutter frame and has a shaving surface on an upper surface of a ring-shaped thin layer portion thereof, and an inner cutter that is driven rotationally and has a cutter body which makes sliding contact from below with a lower surface of said thin layer portion of said outer cutter, wherein

said thin layer portion has a substantially arc shape that is convex upward in said radial and vertical cross-section that includes a center axis line which is a rotational center of said inner cutter,
a thickness of said thin layer portion is smallest near an apex of said convex arc shape and becomes larger as a distance from said apex increases, and
said shaving surface of said outer cutter is formed therein with a flat surface portion that is not orthogonal to said center axis line.

Dependencies are inferred from the claim text.

Facts

Application: 11/353,669Filed 14 Feb 2006
Priority: JP 2005-03810915 Feb 2005
Published: US 2006/0179658 A117 Aug 2006
Granted: 29 Jun 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

B26B 19/141
Of the rotary-cutter type; Cutting heads therefor; Cutters therefor: details of inner cutters having their axes of rotation perpendicular to the…
B26B 19/143
Of the rotary-cutter type; Cutting heads therefor; Cutters therefor: details of outer cutters
B26B
Hand-held cutting tools not otherwise provided for

Family

US 2006/0179658 A1Pre-grant publication · published 17 Aug 2006
US 7,743,507 B2This patent

From the US filing history. Foreign family members aren’t listed.

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