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US 7,581,879 B2Granted
Temperature sensor
AssigneeNgk Spark Plug Co., Ltd.
InventorsAkihiro Miyahara, Go Hanzawa
Life of this patent
Estimating the term…
Abstract
A mounting member 4 of a temperature sensor 1 has a vibration-resisting reinforcement portion 47 between a mounting seat 45 and a joint portion 43, so as to surround a longitudinally long portion of a sheath member 8 and thereby narrowly limit its movable range.
Claims18
A temperature sensor comprising:
- a temperature-sensitive element having an electric characteristic that varies with temperature;
- a sheath member extending in an axial direction and having a metal core wire connected at a tip end thereof to the temperature-sensitive element, and connected at a rear end thereof to a lead wire for connection to an external circuit;
- a metal cap accommodating the temperature sensitive element therein, and joined to a tip end portion of the sheath member;
- a mounting member having a supporting portion supporting the sheath member, and a mounting seat adapted to abut a sensor-mounting seat directly or indirectly via another member;
- a joint portion having an outer diameter smaller than a maximum outer diameter of the mounting seat, joined to a portion of the sheath member located closer to the metal cap than the supporting portion and the mounting seat;
- a vibration-resisting reinforcement portion having an outer diameter greater than a maximum outer diameter of the joint portion and smaller than the maximum outer diameter of the mounting seat, and surrounding a portion of the sheath member arranged between the mounting seat and the joint portion;
- and
- a threaded portion arranged on one or the other axial side of the mounting seat,
- wherein a tip end projection length as measured between the mounting seat of the mounting member and a tip end of the metal cap is 20 mm or more.
6 more elements
A temperature sensor comprising:
- an axially extending metal tube;
- a temperature-sensitive element accommodated in a tip end portion of the metal tube and having an electric characteristic that varies with temperature;
- a mounting member having a supporting portion supporting the metal tube, and a mounting seat adapted to abut a sensor-mounting seat directly or indirectly via another member;
- a joint portion having an outer diameter smaller than a maximum outer diameter of the mounting seat and joined to a portion of the metal tube located on a side toward a tip end of the temperature sensor with respect to the mounting seat;
- a vibration-resisting reinforcement portion having an outer diameter greater than a maximum outer diameter of the joint portion and smaller than the maximum outer diameter of the mounting seat and surrounding a portion of the metal tube arranged between the mounting seat and the joint portion;
- and
- a threaded portion arranged on one or the other axial side of the mounting seat,
- wherein a tip end projection length as measured between the mounting seat of the mounting member and a tip end of the metal tube is 20 mm or more.
5 more elements
Dependencies are inferred from the claim text.