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. 26, 1999
Filed:
Nov. 12, 1997
Applicant:
Inventor:
John Patrick Dilger, Marshalltown, IA (US);
Assignee:
Fisher Controls International, Clayton, MO (US);
Primary Examiner:
Int. Cl.
CPC ...
G12B / ;
U.S. Cl.
CPC ...
73-105 ;
Abstract
A device for remotely calibrating leak sensors. A supply of liquid analyte calibrant is stored in a reservoir, and is communicated to an outlet nozzle by a conduit having a throughbore. The conduit terminates in an outlet nozzle, and portion of the conduit defines a dosing chamber for storing a measured dose of the liquid calibrant. A thermal activator such as a resistive coil or a radio frequency unit is disposed adjacent the dosing chamber for applying a steep thermal gradient in order to bring the calibrant quickly to its boiling point such that the measured quantity is ejected from the outlet nozzle.