US 9,810,372 B2
Bearing system with lubricated exclusion seal
Paul George Conley, St. Charles, MO (US); Bryan Uncapher, Grayslake, IL (US); and Joe T Inciong, Skokie, IL (US)
Assigned to LINCOLN INDUSTRIAL COPORATION, St. Louis, MO (US)
Filed by Paul George Conley, St. Charles, MO (US); Bryan Uncapher, Grayslake, IL (US); and Joe T Inciong, Skokie, IL (US)
Filed on Dec. 31, 2014, as Appl. No. 14/587,302.
Prior Publication US 2016/0186811 A1, Jun. 30, 2016
Int. Cl. F16C 33/72 (2006.01); F16C 33/80 (2006.01); F16N 29/04 (2006.01); F16N 29/02 (2006.01); F16N 13/00 (2006.01); F16C 33/76 (2006.01); F16C 35/04 (2006.01)
CPC F16N 29/04 (2013.01) [F16C 33/76 (2013.01); F16N 13/00 (2013.01); F16N 29/02 (2013.01); F16C 35/047 (2013.01); F16N 2250/04 (2013.01); F16N 2270/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bearing system comprising:
a bearing housing configured to house a bearing, the bearing housing enclosing a free volume for receiving a lubricant and including a shaft opening;
a bearing in the bearing housing;
a pump configured to pump lubricant into the free volume;
a shaft in the shaft opening and rotatably supported by the bearing;
an exclusion seal between the shaft opening and the shaft, the exclusion seal being repeatably and non-destructively shiftable from a sealing state in which the exclusion seal substantially prevents lubricant from leaving the free volume and a release state in which the exclusion seal allows lubricant to escape between the exclusion seal and the shaft, the exclusion seal being shiftable from the sealing state to the release state by increasing a pressure in the bearing housing to above a first level and being shiftable from the release state to the sealing state by decreasing the pressure to below the first level; and
a controller configured to repeatedly shift the exclusion seal between the sealing state and the release state by raising and lowering the pressure in the free volume to continuously maintain a lubricating film of the lubricant between the exclusion seal and the shaft.