Patent application number | Description | Published |
20080257016 | GAS SENSOR - A gas sensor having an axis including a detecting element; a metal shell; an outer cylinder; and a plug member, as defined herein, and the gas sensor includes a first protective member that covers an air vent of the plug member so as to protect the filter member, the protective member having a ventilation portion having an opening smaller than an opening of the air vent and at least partially overlapping the air vent in the axial direction, and at least one of the outer cylinder and the plug member is provided with a locking portion that limits rotation of the protective member around the axis. | 10-23-2008 |
20090071231 | GAS SENSOR - A gas sensor has a sensor element, extending axially, that detects a particular gas component in a gas under measurement, a metal housing causing the end of the sensor element to protrude farther than the end thereof to expose it to the gas under measurement and that surrounds the periphery of the sensor element and an outer tube disposed at the rear end inside the metal housing and a seal member that is disposed farther to the rear than the detection element and also inside the rear end of the outer tube, and that has formed therein a atmosphere-introduction hole passing therethrough in the axial direction, the gas sensor further having a crimped part, formed in the outer tube, for the purpose of holding the seal member a hollow-cylindrical member in contact with the inner peripheral surface of the atmosphere-introduction hole so as to oppose the crimped part, and a metal filter that joins to the hollow-cylindrical member at the rear end of the hollow-cylindrical member and also farther to the rear than the crimped part. | 03-19-2009 |
20100011838 | SENSOR - A sensor including a tubular casing having an open rear end; and a first elastic member having a through hole so as to introduce ambient air into the casing and disposed so as to block the rear end opening of the casing. The sensor further includes: a holding inner tube that closely contacts an inner peripheral surface of the through hole; a ventilation filter that has permeability and a waterproofing property, the ventilation filter including a filter blocking portion that blocks a rear end opening of the holding inner tube, and a filter tubular portion connected to the filter blocking portion and surrounding at least a portion of an outer peripheral surface of a rear end portion of the holding inner tube in the peripheral direction; and a holding outer tube that includes a ventilation hole, an outer tube blocking portion covering the filter blocking portion, and an outer tube tubular portion connected to the outer tube blocking portion and surrounding at least a portion of the filter tubular portion in the peripheral direction. | 01-21-2010 |
20100050740 | GAS SENSOR AND GAS SENSOR UNIT - A gas sensor including a detection element having a detection portion; a metal shell that surrounds the detection element so as to expose the detection portion to a measured atmosphere; an outer tube that is fixed to the metal shell so as to cover a rear end side of the detection element; and a seal member that is contained inside the outer tube, the seal member having a lead wire insertion hole and a through hole that penetrates in the axial direction; a tubular holding member made of a resin having a lower coefficient of thermal expansion than the seal member, the tubular holding member being held inside the through hole, the tubular holding member having a ventilation hole; and a filter that covers the ventilation hole, the filter being joined to the holding member, the filter blocking water from passing therethrough, and the filter having air permeability. | 03-04-2010 |
20100263434 | GAS SENSOR - A gas sensor extending along an axial direction, the gas sensor including: a housing having a through hole, the through hole including an expanding portion at a leading end thereof; a gas sensing element inserted into the housing, having a closed leading end, and provided with a sensor electrode on an outer surface of the leading end side thereof; a heater inserted into the gas sensor, and including a contact portion where the heater contacts an inner surface; an protector fixed on the leading end side of the housing and having an outer protector including an outer air hole and an inner protector being positioned within the outer protector and spaced apart from the outer protector in the radial direction; and an inner air vent provided between the inner protector and the leading end of the housing. | 10-21-2010 |
20110239734 | GAS SENSOR - A gas sensor, including a cylindrical outer tube; and a seal member disposed therein, the seal member including: a lead wire insert hole and an atmosphere communication hole. The seal member has a groove extending outwards in a radial direction at a rear end-facing surface from the atmosphere communication hole while circumventing the lead wire insert hole, the groove having a cutout toward the front end of the seal member. The gas sensor further includes: a protection portion which covers the atmosphere communication hole; and an arm couples the protection portion and the outer tube, and extends in the radial direction, the arm being at least partially disposed in the groove of the seal member. and the arm is disposed so as to define a gap with the bottom surface of the groove. | 10-06-2011 |
20110239740 | GAS SENSOR - A gas sensor, including a cylindrical outer tube; and a seal member disposed in the outer tube, the seal member including: a lead wire insert hole and an atmosphere communication hole extending in an axial direction thereof. The gas sensor further includes: a protection portion which covers the atmosphere communication hole from the rear end of the gas sensor in the axial direction, the protection portion having a protrusion which protrudes toward a rear side of the gas sensor, and has an opening smaller than an opening of the atmosphere communication hole, wherein the protrusion is disposed at a further front end side of the rear end surface of the seal member. | 10-06-2011 |
20110259084 | GAS SENSOR UNIT - A gas sensor unit including: a gas sensor which includes a gas detection element, a sensor terminal and a cylindrical surrounding body which surrounds a periphery of the rear end of the sensor terminal; and a sensor cap. The sensor cap includes a cap terminal and a cap body which has an insertion hole surrounding a part of the rear end of the surrounding body. The cap body is formed of a resin, and a cap body seal surrounding the surrounding body is fitted into the insertion hole. The cap body includes a rear end seal pressing portion that contacts a rear end side surface of the cap body seal; and a leading end seal pressing portion that contacts a leading end side surface of the cap body seal, which holds the cap body seal. | 10-27-2011 |
20130000383 | GAS SENSOR - A gas sensor includes an inner electrode formed on an inner surface of a base body. The inner electrode has an inner sensing portion formed in a gas contact inner region such that the inner sensing portion is located on the whole of a heat-facing area of the gas contact inner region facing a heating portion in a radial direction of the base body, a terminal contact portion formed in a rear end region such that the terminal contact portion is located in at least a part of the rear end region in a circumferential direction of the base body and a lead portion formed only on a part of the inner surface of the base body in the circumferential direction of the base body so as to connect the inner sensing portion and the terminal contact portion to each other. | 01-03-2013 |
20130036795 | GAS SENSOR - [Objective] To provide a gas sensor in which a filter member provided in an aerial communication hole adapted to introduce the air for exposing a reference electrode of a detection element to the air is reliably protected through simple configuration. | 02-14-2013 |
20140190829 | GAS SENSOR - A gas sensor includes a metal shell, a gas sensor element held in the metal shell, a metal portion arranged between a flange portion of the gas sensor element and a seat portion of the metal shell and a porous thermal spray layer formed on the gas sensor element. When viewed in cross section along the direction of an axis of the gas sensor, a corner of the metal portion axially overlaps in position with or radially outwardly protrudes from an outer surface of a part of the thermal spray layer located on a side surface of the flange portion and is brought into contact with the seat portion. A rear end-facing surface of the metal portion is brought into contact with an outer surface of the thermal spray layer at a position radially inside the side surface of the flange portion. | 07-10-2014 |