Title:
KEY FOR CYLINDER LOCK
Document Type and Number:
Japanese Patent JP2018184738
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To achieve all the problems of "increase of key difference", "maintenance of rigid function of blade" and "non-adhesion of dust to knurled portions of blade".SOLUTION: In a key in which a notched tumbler induction serration is formed on a side surface of a blade, i.e., a key for a cylinder lock, the notched tumbler induction serration includes a recessed first serration formed in the blade width direction on an upper surface of one side of a plane part of the blade, and a recessed second serration formed in a lower surface of one side of the plane part of the blade corresponding to a substantially back side position of the first serration, and the cross sectional shape of an edge portion in the blade width direction which passes through a central portion of the first serration and the second serration is a substantially chevron shape having inclined ridge line portions.SELECTED DRAWING: Figure 7
Inventors:
TANAKA KENICHI
KAWAI NOBUYUKI
MORITA HIDEKI
KAWAI NOBUYUKI
MORITA HIDEKI
Application Number:
JP2017085871A
Publication Date:
November 22, 2018
Filing Date:
April 25, 2017
Export Citation:
Assignee:
MIWA LOCK KK
International Classes:
E05B19/08; E05B19/00
Attorney, Agent or Firm:
Mitsuyasu Miura
Takayuki Kayahara
Takayuki Kayahara