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:
May. 08, 2012
Filed:
Jun. 18, 2010
Nicolas Rebeaud, Le Mont-sur-Lausanne, CH;
Nicolas Rebeaud, Le Mont-sur-Lausanne, CH;
The Swatch Group Research and Development Ltd., Marin, CH;
Abstract
The invention concerns a pressure sensor (), particularly for a depth gauge (), capable of having a high level of precision, owing to sufficient elastic deflection amplitude of the diaphragm (or membrane), while avoiding any risk of plastic deformation. The diaphragm () is formed by a flat metal disc. The peripheral region () thereof is neither welded nor inset, but it is pre-stressed against a stop strip () with a closed, preferably circular contour, and can pivot on the stop strip () when the diaphragm bends under the effect of fluid pressure in the pressure chamber (). The pre-stressing may be achieved via a sealing gasket () located opposite the stop strip (). Between said strip and a central aperture (), a concave stop surface () limits the deflection of the diaphragm () and prevents any plastic deformation in the event of excessive pressure. Manufacture of the diaphragm is simple, with a high level of reproducibility, assembly is easy and the seal quality is high.