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. 07, 2003
Filed:
Mar. 10, 2000
Applicant:
Inventors:
Stephen J. Taylor, Buckinghamshire, GB;
Robert Fagan Donat Bradshaw, Wiltshire, GB;
Assignee:
Graseby Dynamics Limited, Hertfordshire, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 1/24 ;
U.S. Cl.
CPC ...
G01N 1/24 ;
Abstract
A fluid sampling system has a drift cell ( ) enclosing a first fluid. An inlet chamber ( ) communicates with the body of first fluid via an orifice ( ). A series of negative pressure pulses is applied to the first fluid, causing a sample of a second fluid to be drawn in through the orifice ( ). The sample is then entrained into the air flow of a closed loop circulatory system and is detected or measured by an ion mobility spectrometer. A second chamber may be linked to the first chamber, with the negative pressure pulses provided by the second chamber.