The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2005
Filed:
Aug. 02, 2002
Hiroyuki Kameoka, Hikone, JP;
Masaaki Satou, Oumihachiman, JP;
Shunsuke Komori, Hikone, JP;
Toshio Ikuta, Hikone, JP;
Tadashi Hamada, Sakai, JP;
Hiroyuki Kameoka, Hikone, JP;
Masaaki Satou, Oumihachiman, JP;
Shunsuke Komori, Hikone, JP;
Toshio Ikuta, Hikone, JP;
Tadashi Hamada, Sakai, JP;
Matsushita Electric Works, Ltd., Kadoma, JP;
Abstract
An inner cutter for a dry shaver has a plurality of bladessupported on a baseand is driven in hair-shearing engagement with an outer cutterfor cutting the hairs. The bladesare arranged in parallel with each other and are each provided on opposite sides at its top with cutting edges. The cutting edgeis defined between the top face of the blade and a rake fadeon the underside of the blade. The rake faceis inclined with respect to the top face at an angle of α (°), while the cutting edge is rounded at its tip to have a curvature radius R (μm) which satisfies a relation that R≧−0.067·α+4.7. With this result, the cutting resistance for cutting the hair can be lowered below a load necessary for bending the hair. Thus, the blade of the inner cutter can itself cut the hair without bending the hair, giving a flat cutting plane finish and enabling a close shave only with a fewer shaving strokes.