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:
Jul. 27, 1999
Filed:
Sep. 11, 1997
Naoki Hiraoka, Tokyo, JP;
Hiroshi Sakanoue, Tokyo, JP;
Noriaki Hayashi, Tokyo, JP;
Wataru Fukui, Tokyo, JP;
Yutaka Ohashi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention provides a high-accuracy and high-reliability magnetic sensor which can be produced with a high production yield at a low cost. The magnetic sensor includes: a main sensor unit including: an intermediate part in the form of a short rectangular prism serving as a fitting part; a seating formed on one end face of the intermediate part such that the seating has a step shape and such that the exterior circumferential surface of the seating serves as a fitting-in portion; a main part disposed at a right angle on the principal surface of the seating, the main part including: a sensor element disposed on the end of the main part; a permanent magnet disposed adjacent to the sensor element; and an electronic component; and a connector extending from the intermediate part; and a case including: a sleeve in the form of a cylinder with a closed end and an open end, the sleeve having a receiving portion formed on the open end, the sleeve having a sealed space serving as a space in which the main part is placed; and a holding part extending from the sleeve and including a receiving part and a separation stopper; wherein the magnetic sensor is characterized in that a liquid reservoir space is formed between the fitting-in portion and the receiving portion along the circumference, and the liquid reservoir space is filled with liquid packing.