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:
Oct. 07, 1986
Filed:
Aug. 12, 1985
Applicant:
Inventor:
Lani G Ache, Allentown, PA (US);
Assignee:
Ametek, Inc., Sellersville, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
73741 ; 92 90 ;
Abstract
A pressure gauge for use with a corrosive fluid containing a sulfide which includes a Bourdon tube made from stainless steel type 316 and having a first or outer hardened layer and a second or inner layer having a hardness equal to or less than Rc22. The Bourdon tube is welded to a socket and to a closure member using stainless steel type 316 such that the weld seals the interface between the first and second layers to isolate the hardened outer layer from the corrosive fluid.