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US4479728A Expired / Lapsed US ⏱️ 0.0 years remaining

Turbocharger bearing system

Assignee: Cummins Turbo Technologies Ltd
•
Filing: 1983-04-22
•
Granted: 1984-10-30
•
Expires: 2003-04-22
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Abstract

Abstract The disclosure illustrates a turbocharger bearing assembly for the shaft which supports a compressor and turbine for rotation. The bearing assembly accomodates axial thrust and comprises a plate with a central aperture through which the shaft extends, the central shaft having a pair of flanges adjacent or opposite faces of the plate. Each face of the plate has a plurality of tapered lands having a low end and high end which define bearing sectors disposed in succession in an arcuate way about the aperture. Each sector, in the radially outer portion thereof adjacent the high end is retrenched along the sector towards the low end of the sector so that along the direction of rotation of the counter thrust surface relative to the sector, the outer portion of the high end terminates before a more radially inner portion of the high end. An oil supply passage feeds oil to the faces of the plate to provide an oil film over the bearing sectors.

Inventors

  • 👤 Steven M. Miller

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 05:35
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/1025; F16C33/106; F16C33/1075; F01; F01D; F01D25/00; F01D25/16; F01D25/166; F01D25/168; F16C17/00; F16C17/04; F16C17/047; F16C2360/00; F16C2360/23; F16C2360/24

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 122 words
A turbo machine thrust bearing system for a rotatable shaft journalled for rotation and having an annular counter thrust surface, said thrust bearing system comprising: a plate comprising a central aperture through which the shaft extends and having a plurality of tapered lands having a low end and a high end defining bearing sectors disposed in succession in an arcuate array about the aperture, each sector in the radially outer portion thereof adjacent the high end being retrenched along the sector towards the low end of the sector so that along the direction of rotation of the counter thrust surface relative to the sector, the outer portion of the high end terminates before a more radially inner portion of the high end.
Claim 2
Dependent Claim 122 words
A turbo machine thrust bearing system for a rotatable shaft journalled for rotation and having an annular counter thrust surface, said thrust bearing system comprising: a plate comprising a central aperture through which the shaft extends and having a plurality of tapered lands having a low end and a high end defining bearing sectors disposed in succession in an arcuate array about the aperture, each sector in the radially outer portion thereof adjacent the high end being retrenched along the sector towards the low end of the sector so that along the direction of rotation of the counter thrust surface relative to the sector, the outer portion of the high end terminates before a more radially inner portion of the high end.
Claim 3
Dependent Claim 25 words
Apparatus as in claim 1 wherein said retrenchments are arcuate in shape when viewed in a plane normal to the axis of said central aperture.
Claim 4
Dependent Claim 24 words
Apparatus as in claim 1 wherein said lands each have a notch opening into said central aperture adjacent the low end of each sector.
Claim 5
Dependent Claim 15 words
Apparatus as in claim 1 wherein said plate has a perimeter groove interconnecting said retrenchments.
Claim 6
Dependent Claim 25 words
Apparatus as in claim 4 wherein said retrenchments are arcuate in shape when viewed in a plane normal to the axis of said central aperture.
Claim 7
Dependent Claim 27 words
Apparatus as in claim 5 wherein at least one of said lands has a notch opening into said central aperture adjacent the low end of each sector.
Claim 8
Dependent Claim 13 words
Apparatus as in claim 6 wherein all of said lands have said notches.
Claim 9
Dependent Claim 14 words
Apparatus as in claim 7 wherein lands are retrenched in the low ends also.
Claim 10
Dependent Claim 16 words
Apparatus as in claim 8 wherein said lands are formed on opposite faces of said plate.
Claim 11
Dependent Claim 33 words
Apparatus as in claim 9 wherein said plate has a passage extending from one of said notches to a radially outer portion of said plate whereby oil may be passed to the notches.

References Cited (Backward Citations)

US3141909A Cited
US3399000A Cited
US3575476A Cited
US4243275A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-10-30 1988-04-30 1988-10-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-10-30 1992-04-30 1992-10-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-10-30 1996-04-30 1996-10-30 $7700.00 Window Closed / Lapsed

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