Method of manufacturing a flowmeter for the precision measurement of an ultra-pure material flow

• US 20070033793A1
• Filed: 09/21/2006
• Published: 02/15/2007
• Est. Priority Date: 11/26/2001
• Status: Abandoned Application

• Current Assignee: Daniel Mcnulty, Leland Leber, Mark Bell, Martin Schlosser, Matthew Wheeler
• Original Assignee: Daniel Mcnulty, Leland Leber, Mark Bell, Martin Schlosser, Matthew Wheeler
• Inventors: Wheeler, Matthew, Bell, Mark, McNulty, Daniel, Schlosser, Martin, Leber, Leland
• Application Number:
  US11/524,639
• Publication Number:
  US 20070033793A1
• Time in Patent Office: Days
• US Class Current: 29/428
• CPC Class Codes: G01F 1/8404 details of flowmeter manufacturing methods
• CPC Class Codes: G01F 1/8409 constructional details
• CPC Class Codes: G01F 1/8413 means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
• CPC Class Codes: G01F 1/8427 detectors
• CPC Class Codes: G01F 1/8477 with multiple measuring conduits
• CPC Class Codes: G01F 1/849 having straight measuring conduits
• CPC Class Codes: G01F 1/8495 with multiple measuring conduits
• CPC Class Codes: G01F 15/006 characterised by the use of a particular material, e.g. anti-corrosive material G01F15/14 takes precedence
• CPC Class Codes: Y10T 29/494 Fluidic or fluid actuated device making
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A method of manufacturing a Coriolis flowmeter for the measurement of a process material requiring an ultra high level of purity. This is achieved by forming the entire flow path of the Coriolis flow meter from a PFA plastic material that does not transfer ions from the Coriolis flowmeter to the process material flowing through the flowmeter.

Claims

1. A method of manufacturing a Coriolis flowmeter;

said method comprising the steps of;

coupling a flow tube to a base, wherein said flow tube is formed entirely from a material that does not release deleterious ions into a substance flowing through the flowmeter and where said flow tube is configured to vibrate along a length of said flow tube where the length of said flow tube is defined from where the flow tube is coupled to said base at a first location to where the flow tube is coupled to said base at a second location;

affixing a driver to said length of said flow tube;

coupling a pick-off sensor to said length of said flow tube.

2. The method of manufacturing a Coriolis flowmeter of claim 1 where the material is selected from the group:

perfluoroalkoxy copolymer (PFA) or polytetrafluorethylene (PTFE).