The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2001
Filed:
Mar. 04, 1999
Fujikoki Corporation, Tokyo, JP;
Abstract
A pressure sensor,comprises a metallic housing,having a space,communicated to a pressure detection space and a thin rising portion,formed on the upper end of the peripheral area, a sensor element,, a sensor element holder,, a metallic pressure case,having a ceiling portion,, and a connector case,formed of an insulating material, wherein a collar portion,of a base plate,of the sensor element,including a pressure sensing element,is contacted to an annular protrusion,positioned around the opening,of the sensor element holder,, and the collar portion,is airtightly welded to the annular protrusion,by projection welding. Further, the collar portion,on the pressure case,and the peak surface,of the holder,is airtightly welded by an electron beam welding. The airtight interior space defined by the sensor element,, the sensor element holder,and the pressure case,is utilized as the reference pressure space.