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:
Sep. 21, 2004
Filed:
Feb. 20, 2003
Minoru Murata, Obu, JP;
Minekazu Sakai, Kariya, JP;
Denso Corporation, Kariya, JP;
Abstract
A capacitive acceleration sensor includes a supporting substrate, a movable member, and two fixed members. The movable member moves in response to a force that acts on the movable member. Each fixed member is stationary under the force. Two capacitances are formed between the movable member and the fixed members. One of the capacitances increases while the other decreases when the movable member moves in response to the force. The force includes a substantially constant force and a variable force when an acceleration is measured using the sensor. The variable force is proportional to the acceleration. The acceleration is measured on the basis of the difference between the capacitances. The capacitances are different from each other when the force that acts on the movable member is zero to reduce the difference between the capacitances that corresponds to the substantially constant force.