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:
Dec. 16, 2003
Filed:
May. 04, 2000
Christina A. Nord, Burnsville, MN (US);
David A. Horky, Mound, MN (US);
Kenneth G. Guttsen, Chaska, MN (US);
Thomas E. Johnson, St. Louis Park, MN (US);
Matthew G. Sherin, Columbia Heights, MN (US);
Kevin P. Szafranski, Foley, MN (US);
William J. Ballot, New Brighton, MN (US);
Renae M. Patrick, Eden Prairie, MN (US);
Donald E. Harasyn, Eden Prairie, MN (US);
Ryan R. Eidenschink, Plymouth, MN (US);
Todd W. Schansberg, Jordan, MN (US);
Mark G. Romo, Eden Prairie, MN (US);
Steven M. Behm, White Bear Lake, MN (US);
Bennett L. Louwagie, Plymouth, MN (US);
Robert C. Hedtke, Young America, MN (US);
Stanley E. Rud, Jr., Victoria, MN (US);
Jeffrey C. Brekken, Richfield, MN (US);
Rosemount, Inc., Eden Prairie, MN (US);
Abstract
A pressure transmitter with a fluid isolator that includes a sensor tube and a fill tube that have “D” shaped ends that connect together in a port internal to the transmitter. The shaped ends can be brazed into the port for sealing. Fitting both the sensor tube and the fill tube in the same port provides a low cost isolator with reduced isolator liquid volume. The fluid isolator has an isolator diaphragm with a central diaphragm region overlying a central backing plate that includes a annular groove. The annular groove avoids slow response of the isolator after an overpressure condition.