Leroy P Erickson

US Patent:

6558134, May 6, 2003

Filed:

Jul 27, 2001

Appl. No.:

09/917299

Inventors:

Mark Serafin - Apple Valley MN
LeRoy C. Erickson - Blaine MN

Assignee:

Imation Corp. - Oakdale MN

International Classification:

F04B 2500

US Classification:

417246, 417244, 417400, 417401, 417539, 417 53

Abstract:

An intensifier pump system includes a supply pump for delivering fluid products at an intermediate pressure. The products are delivered to one or more intensifier pumps that take advantage of hydraulic intensification to expel the product at high pressures to assure continuous product deployment in various systems. After an extension cycle in one of the intensifier pumps, product is delivered from the supply pump at a pressure sufficient to retract the intensifier pump and fill the chamber with fluid.

US Patent:

6923865, Aug 2, 2005

Filed:

Mar 29, 2002

Appl. No.:

10/112987

Inventors:

Mark Serafin - Apple Valley MN, US
Stanley R. Ellis - Mahtomedi MN, US
Leroy C. Erickson - Blaine MN, US
Scott A. Walker - White Bear Lake MN, US
Daniel W. Brandt - Stillwater MN, US

Assignee:

Imation Corp. - Oakdale MN

International Classification:

B05C011/00

US Classification:

118610, 118608, 118603

Abstract:

Techniques for precisely controlling the size of particles in a coating solution delivered to a coating apparatus involve continuous classification of coating particle size using a tangential flow filter assembly. The techniques may be particularly useful in the preparation of coating dispersions for manufacture of magnetic recording media. A classification technique makes use of a tangential flow filter assembly that permits delivery of coating particles below a maximum size threshold to a coating path. The filter assembly may be disposed in a circulation path that includes one or more processing devices to reduce the size of coating particles carried by a coating solution. The filter assembly enables coating particles above the maximum size threshold to be recirculated through the circulation path and subjected to repeated processing to reduce particle size to a desired size range.

US Patent:

63285428, Dec 11, 2001

Filed:

Jul 29, 1999

Appl. No.:

9/363400

Inventors:

Mark Serafin - Apple Valley MN
LeRoy C. Erickson - Blaine MN

Assignee:

Imation.Corp. - Oakdale MN

International Classification:

F04B 1700
F04B 3500

US Classification:

417399

Abstract:

A check valve system and method control the opening and closure of a check valve that supplies product fluid to an intensifier pump based on the position of a piston within the intensifier pump. Position sensing allows anticipation of different events along the path traveled by the piston, such as the start and end of advance, retract, and precompression cycles. The system and method operate to selectively open and close associated check valves based on the sensed position to carefully control the delivery of fluid to each intensifier pump. Active control of the check valves based on piston position allows more precise timing of fluid delivery in relation to the piston cycles. Anticipation of the onset of piston advance and retraction cycles can improve valve response time, providing more uniform fluid pressure for a continuous, steady, high pressure flow of fluid with minimal pressure fluctuation.