公开(公告)号：US09995707B2

公开(公告)日：2018-06-12

申请号：US15170845

申请日：2016-06-01

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Tomoki Fujii ,  Takaya Yoshikawa

IPC: G01N27/00 ,  G01N7/00 ,  G01N27/407

CPC classification number: G01N27/4077 ,  G01N27/4073 ,  G01N27/4075

Abstract: A protector includes an inside protector having an inside peripheral wall and a front end wall in a front end side thereof and a tubular outside protector which surrounds the inside protector. In an outside peripheral wall of the outside protector, a plurality of outside introducing ports through which an external part of the outside protector communicates with a gas separating chamber are formed at equal intervals along a circumferential direction. The outside introducing ports are formed at positions nearer to the front end side than positions where inside introducing ports of the inside protector are formed. The outside introducing ports extend in the circumferential direction of the outside peripheral wall and formed in shapes of lateral holes in which opening lengths in the circumferential direction are larger than opening lengths in the direction perpendicular to the circumferential direction.

公开(公告)号：US10775342B2

公开(公告)日：2020-09-15

申请号：US16165404

申请日：2018-10-19

Applicant: NGK Spark Plug Co., LTD.

Inventor： Tomoki Fujii ,  Takehiro Oba

IPC: G01N27/407

Abstract: In a circular cross section of a protector obtained by cutting the protector along a plane which is orthogonal to the axial direction and passes through gas introduction holes, one gas introduction hole and another gas introduction hole having an opening area different from that of the one gas introduction hole are arranged along an imaginary line passing through the center of the circular cross section such that the two gas introduction holes are located on opposite sides with respect to the center of the circular cross section.

公开(公告)号：US10908116B2

公开(公告)日：2021-02-02

申请号：US16165295

申请日：2018-10-19

Applicant: NGK Spark Plug Co., LTD.

Inventor： Tomoki Fujii ,  Takehiro Oba

IPC: G01N27/407

Abstract: In a circular cross section obtained by cutting a protector along a plane which is orthogonal to an axial direction and passes through gas introduction holes, the gas introduction holes are arranged asymmetrically in the circumferential direction of a circumferential wall of the protector. When the circular cross section is bisected into first and second divisional regions by a straight line which passes through the center of the circular cross section and does not pass through any gas introduction holes, the total opening area of gas introduction holes located in the first divisional region is smaller than the total opening area of gas introduction holes located in the second divisional region.

公开(公告)号：US09733207B2

公开(公告)日：2017-08-15

申请号：US14074861

申请日：2013-11-08

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Tomoki Fujii ,  Takaya Yoshikawa

IPC: G01N27/00 ,  G01N7/00 ,  G01N27/407

CPC classification number: G01N27/4077 ,  G01N27/4073 ,  G01N27/4075

Abstract: A protector includes an inside protector having an inside peripheral wall and a front end wall in a front end side thereof and a tubular outside protector which surrounds the inside protector. In an outside peripheral wall of the outside protector, a plurality of outside introducing ports through which an external part of the outside protector communicates with a gas separating chamber are formed at equal intervals along a circumferential direction. The outside introducing ports are formed at positions nearer to the front end side than positions where inside introducing ports of the inside protector are formed. The outside introducing ports extend in the circumferential direction of the outside peripheral wall and formed in shapes of lateral holes in which opening lengths in the circumferential direction are larger than opening lengths in the direction perpendicular to the circumferential direction.