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:
Apr. 28, 2009
Filed:
Sep. 06, 2002
Klaus Meyer, Ditzingen, DE;
Julius Nemzov, Esslingen, DE;
Ulrich Mueller, Herrliberg, CH;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention proposes sensor elements () for detecting a physical measurement variable such as a pressure, a temperature, a gap width, or a capacitance between two bodies () that move in relation to each other during operation and experience high tribological stress. In certain areas between the surfaces of the bodies () that move in relation to each other, in a surface region of at least one of the bodies (), a sensitive layer (), in particular a sensor segment (), is provided, which is separated from the body () by an insulation layer () and has a covering layer () in a first embodiment. In an alternative embodiment, a surface region of at least one of the two bodies () has a recess () in which the sensor surface () is disposed on the insulation layer (). In a third embodiment, the sensor surface () has a length of 10 μm to 5 mm, a width of less than 5 μm, and a thickness of less than 200 nm.