Patent Number: 6,308,734

Title: Dry running coolant union

Abstract: A rotary union for delivery of a coolant fluid to a spindle of a metal working machine comprises a housing having a cylindrical bore containing bearings for journaling a tubular shaft therein wherein the improvement resides in the provision of a floating bushing seal as the high-pressure seal. The floating bushing seal assembly includes a seal housing containing a plurality of longitudinally disposed bushing rings that have a low clearance fit with respect to the tubular shaft of the rotary union.

Inventors: Smith; Brian E. (Andover, MN), Wenk; Ross A. (St. Paul, MN)

Assignee: Talco, Inc.

International Classification: F16L 27/08 (20060101); F16L 27/00 (20060101); F16L 027/08 ()

Expiration Date: 10/30/2018