![]() F16C19/00- Bearings with rolling contact, for exclusively rotary movement. ![]() F16J15/4476- Labyrinth packings with radial path.F16C35/042- Housings for rolling element bearings for rotary movement.caps, covers in the case of ball or roller bearings F16C35/04- Rigid support of bearing units Housings, e.g.F16C35/00- Rigid support of bearing units Housings, e.g.F16C33/76- Sealings of ball or roller bearings.F16C33/00- Parts of bearings Special methods for making bearings or parts thereof.F16C- SHAFTS FLEXIBLE SHAFTS ELEMENTS OR CRANKSHAFT MECHANISMS ROTARY BODIES OTHER THAN GEARING ELEMENTS BEARINGS.F16- ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS THERMAL INSULATION IN GENERAL.between stages by packing rings Mechanical seals F01D11/003- Preventing or minimising internal leakage of working-fluid, e.g.F01D11/00- Preventing or minimising internal leakage of working-fluid, e.g.F01D- NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g.F01- MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES.F- MECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING.Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). KG reassignment Schaeffler Technologies AG & Co. Priority to US08/927,275 priority Critical patent/US5904356A/en Application granted granted Critical Publication of US5904356A publication Critical patent/US5904356A/en Assigned to Schaeffler Technologies AG & Co. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from US2518296P external-priority Application filed by Mundy David R. Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Mundy Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US08/927,275 Inventor David R. Google Patents Labyrinth seal with contaminant purging passageway for bearing housingsĭownload PDF Info Publication number US5904356A US5904356A US08/927,275 US92727597A US5904356A US 5904356 A US5904356 A US 5904356A US 92727597 A US92727597 A US 92727597A US 5904356 A US5904356 A US 5904356A Authority US United States Prior art keywords labyrinth piston rings grease seal annular member Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5904356A - Labyrinth seal with contaminant purging passageway for bearing housings It was the start of an ongoing journey to supply permanent bearing protection to industrial rotating equipment.US5904356A - Labyrinth seal with contaminant purging passageway for bearing housings The first Bearing Isolator was installed in 1975 at the Grain Processing Corporation plant in Muscatine, Iowa, to address a critical issue. It would perform much better than any other labyrinth seals made by pump manufacturers because it would hold off any contamination without contact.” “We finally found a combination of rotor and stator that would keep oil in, but also ward off contamination up to and including a fire hose. “It took about six months to design something that would work in severe hose-down conditions,” said Orlowski. As he experimented with labyrinth seals, Orlowski started with the challenging application of pumps in the corn processing industry, which were cleaned daily – with a fire hose. Orlowski then turned his attention to solving this issue on process pumps, where rubber lip seals were standard. Orlowski and his team retrofitted the API refinery pumps with standard API labyrinth seals, made with a rotor and a stator. It went through there and into the bearing housing, causing bearing failure and a catastrophic wreck.” One of the single spring mechanical seals started to spray water and of course the water was coming out of the seal and going right through and under the lip seal, which was worn. The building structure began to suffer and several windows had fallen from the 110-story building onto the street below.Īccording to Orlowski, “They were refinery pumps with rubber lip seals, which is a rarity. One of the chilled water pumps had failed, though, resulting in a cooling system failure. Orlowski was working in the pump distribution and repair business when he was called out to repair and retrofit 16 HVAC pumps at Chicago’s Sears Tower.Įven though it was February in Chicago, the south side of the building was supposed to be cooled because of the intense daytime sun load. Falling Windows: The Origin of the Bearing Isolator
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