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:
Feb. 24, 1987
Filed:
Jul. 11, 1985
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ; G01L / ;
U.S. Cl.
CPC ...
73706 ; 73727 ; 73754 ; 73DI / ; 338 42 ;
Abstract
A semiconductor strain-gage is disposed in a recessed chamber of a housing. A step is provided in the recessed chamber. Minute grooves are provided in the inner peripheral portion of the step. An outer periphery of a metal disk with a pressure introducing bore is clamped to the minute grooves by means of plastic deformation thereof, after the seal diaphragm is disposed on a planer portion of the step, whereby the seal diaphragm closes the recessed chamber harmetically.