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. 03, 1978
Filed:
May. 17, 1976
Applicant:
Inventor:
Leslie B Wilner, Palo Alto, CA (US);
Assignee:
Becton, Dickinson Electronics Company, San Juan Capistrano, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
7372 / ; 338-4 ; 338 42 ;
Abstract
A diaphragm for a miniature pressure transducer has its surface sculptured by anisotropic etching to provide gauge areas in the form of narrow thin flexure areas between thick areas in the form of islands or motes. The thick areas act to constrain or stiffen the flexure areas from bending along their lengths while facilitating the bending thereof about axes parallel to their lengths when the diaphragm deflects in response to a pressure change. Linear piezoresistive gauges diffused into the gauge areas are responsive to the bending of said flexure areas to change resistance by an amount corresponding to the pressure change.