Invention Grant
- Patent Title: Tire air-pressure sensor
- Patent Title (中): 轮胎气压传感器
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Application No.: US12303884Application Date: 2007-05-24
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Publication No.: US07987706B2Publication Date: 2011-08-02
- Inventor: Hiroshi Tanuma , Naoki Saito
- Applicant: Hiroshi Tanuma , Naoki Saito
- Applicant Address: JP Tokyo
- Assignee: Yokowo Co., Ltd.
- Current Assignee: Yokowo Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Morgan, Lewis & Bockius LLP
- Priority: JPP.2006-159508 20060608
- International Application: PCT/JP2007/061034 WO 20070524
- International Announcement: WO2007/142103 WO 20071213
- Main IPC: G01L7/00
- IPC: G01L7/00

Abstract:
The present invention provides a tire air-pressure sensor (30) in which water is hard to intrude into a communication passage (36) communicating with a sensor portion (18a) of an air-pressure sensor element (18) and in which water having intruded into the communication passage (36) is discharged out of a case (32). Two air holes (34), (34) are formed in a crest portion of the case (32) of the tire air-pressure sensor (30) arranged and fixed in a wheel (10) in a manner to be positionally shifted in a rotating direction of the wheel (10), and an opening of an air vent hole (16) is formed in a cap (38) which is put on the air-pressure sensor element (18) arranged in the case (32), at an intermediate position between the two air holes (34), (34) in the rotating direction. The two air holes (34), (34) and the opening of the air vent hole (16) are brought into communication by the communication passage (36) on a substantial plane normal to the radial direction of the wheel (10), between the crest portion of the case (32) and the cap (38). Walls (40) are interposed between the air holes (34), (34) and the opening of the air vent hole (16) so as to bring the communication passage (36) into a meandering state.
Public/Granted literature
- US20100236325A1 TIRE AIR-PRESSURE SENSOR Public/Granted day:2010-09-23
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