Patent US5393145A successfully refreshed from Google Patents.
US5393145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pad type hydrodynamic thrust bearings having a modular construction
Assignee: Waukesha Bearings Corp
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Filing: 1993-11-12
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Granted: 1995-02-28
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Expires: 2013-11-12
Abstract
Abstract A hydrodynamic bearing which includes a carrier and a plurality of bearing pads circumferentially spaced about the carrier. The pads may have a modular construction whereby pad portions are secured to support portions. The pads may also be releasably secured to the carrier. Various bearing pad constructions are contemplated. This includes constructions in which the secondary support portion includes a membrane and the primary support portion includes a cylindrical member extending between the membrane and the bearing pads, relatively rigid constructions in which the necessary deflections are achieved through pad shape and center post configurations and positioning, pads having a wear surface formed therein, and a continuous bearing pad ring may be substituted for the discrete bearing pads. The carrier may be provided with locator pins in the pad receiving bores to orient the pads properly. The carrier may have cuts and grooves formed therein to provide a flexible or even beam mounted support for the bearing pads. The bearing may also have a multimode configuration and may include smart structures.
Inventors
- 👤 Russell D. Ide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:38
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/02; F16F15/023; F16F15/0237; F16C; F16C17/00; F16C17/02; F16C17/03; F16C17/035; F16C17/04; F16C17/06; F16C17/065; F16C2202/00; F16C2202/20; F16C2202/28
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
229 words
A modular hydrodynamic bearing adapted to support a rotating shaft, the bearing comprising: a carrier member, the carrier member having a plurality of openings formed therein, the openings being spaced about a predetermined axis; a plurality of bearing pads secured in the openings of the carrier, each of the bearing pads comprising a pad portion having a pad surface a supported surface and at least one edge extending between the pad surface and the supported surface; a support portion having an axis which is perpendicular to the plane of the pad surface and the support portion supporting the pad portion at a location on the supported surface which is spaced from any edge of the pad, and a base supporting the support portion; the support portion having a first end attached to the pad portion at said location spaced from any edge of the pad and a second end attached to the base and a central region between the first and second ends wherein the support portion is curved so as to flare outward toward the first and second ends so that the support portion is wider proximate the first and second ends than it is in the central region and the support portion being symmetrical about its axis such that every section of the support portion lying on a plane transverse to the axis has the same shape.
Claim 2
Dependent Claim
229 words
A modular hydrodynamic bearing adapted to support a rotating shaft, the bearing comprising: a carrier member, the carrier member having a plurality of openings formed therein, the openings being spaced about a predetermined axis; a plurality of bearing pads secured in the openings of the carrier, each of the bearing pads comprising a pad portion having a pad surface a supported surface and at least one edge extending between the pad surface and the supported surface; a support portion having an axis which is perpendicular to the plane of the pad surface and the support portion supporting the pad portion at a location on the supported surface which is spaced from any edge of the pad, and a base supporting the support portion; the support portion having a first end attached to the pad portion at said location spaced from any edge of the pad and a second end attached to the base and a central region between the first and second ends wherein the support portion is curved so as to flare outward toward the first and second ends so that the support portion is wider proximate the first and second ends than it is in the central region and the support portion being symmetrical about its axis such that every section of the support portion lying on a plane transverse to the axis has the same shape.
Claim 3
Dependent Claim
20 words
The bearing of claim 1, wherein the pad portion has a lower edge which is tapered to improve inlet bending.
Claim 4
Dependent Claim
26 words
The bearing of claim 1, wherein a separate and distinct wear surface is formed on the pad surface of a different material than the pad portion.
Claim 5
Dependent Claim
19 words
The bearing of claim 3, wherein the wear surface is formed of a resin molded onto the pad portion.
Claim 6
Dependent Claim
28 words
The bearing of claim 3, wherein a layer of surface roughening is provided on the pad portion to assist adherence of the wear surface to the pad portion.
Claim 7
Dependent Claim
48 words
The bearing of claim 1, wherein the bearing pad portion is circular and has a pad center and wherein the axis of the support portion is radially outward of the pad center such that the pads are supported for deflection of the radially innermost edge downward under load.
Claim 8
Dependent Claim
62 words
The bearing of claim 1, wherein a locating projection is provided on one of the base portion of the pad and the support portion of the carrier and the other of the pad portion and the support portion includes a projection receiving opening for receiving the projection so as to precisely position the non-circular bearing pad with respect to the support portion.
Claim 9
Dependent Claim
21 words
The bearing of claim 1, further comprising locating means for precisely orienting each of the non-symmetrical bearing pads in the carrier.
Claim 10
Dependent Claim
67 words
The bearing of claim 1 wherein the carrier includes a plurality of bores adapted to receive the bearing pads and wherein a locating projection is formed in each bore and each bearing pad includes an opening for receiving the locating projection such that when the bearing pad is received a bore in the carrier, the locating projection precisely orients the bearing pad with respect to the carrier.
Claim 11
Dependent Claim
141 words
A bearing for supporting a rotating shaft part, the bearing comprising: a unitary carrier, the carrier having an axis, the carrier further comprising a plurality of openings spaced about the axis; a plurality of bearing pads, each bearing pad being mounted in one of the openings formed in the carrier, each bearing pad comprising a pad portion which is circular and has a pad center about which the pad portion is symmetrical and a support portion which is circular in section and symmetrical about an axis extending transverse to the pad portion, the support portion including a double curved section having a large portion at each end and a narrow center region, one large end being secured to the pad portion, the support portion being shaped such that any section thereof which is transverse to the axis of symmetry is circular.
Claim 12
Dependent Claim
141 words
A bearing for supporting a rotating shaft part, the bearing comprising: a unitary carrier, the carrier having an axis, the carrier further comprising a plurality of openings spaced about the axis; a plurality of bearing pads, each bearing pad being mounted in one of the openings formed in the carrier, each bearing pad comprising a pad portion which is circular and has a pad center about which the pad portion is symmetrical and a support portion which is circular in section and symmetrical about an axis extending transverse to the pad portion, the support portion including a double curved section having a large portion at each end and a narrow center region, one large end being secured to the pad portion, the support portion being shaped such that any section thereof which is transverse to the axis of symmetry is circular.
Claim 13
Dependent Claim
34 words
The bearing of claim 10, wherein the carrier is a flexible carrier formed with a plurality of openings in which the bearings pads are mounted are flexibly supported for deflection in a predetermined direction.
Claim 14
Dependent Claim
148 words
A modular hydrodynamic bearing adapted to support a rotating shaft, the bearing comprising: a carrier member, the carrier member having a plurality of openings formed therein, the openings being spaced about a predetermined axis; a plurality of bearing pads secured in the openings of the carrier, each of the bearing pads comprising a pad portion having a pad surface, a support portion supporting the pad portion, and a base supporting the support portion; the pad portion having a tapered lower edge; the support portion having a first end attached to the pad portion and a second end attached to the base and a central region between the first and second ends wherein the support portion is curved so as to flare outward toward the first and second ends so that the support portion is wider proximate the first and second ends than it is in the central region.
Claim 15
Dependent Claim
148 words
A modular hydrodynamic bearing adapted to support a rotating shaft, the bearing comprising: a carrier member, the carrier member having a plurality of openings formed therein, the openings being spaced about a predetermined axis; a plurality of bearing pads secured in the openings of the carrier, each of the bearing pads comprising a pad portion having a pad surface, a support portion supporting the pad portion, and a base supporting the support portion; the pad portion having a tapered lower edge; the support portion having a first end attached to the pad portion and a second end attached to the base and a central region between the first and second ends wherein the support portion is curved so as to flare outward toward the first and second ends so that the support portion is wider proximate the first and second ends than it is in the central region.
Claim 16
Dependent Claim
22 words
The bearing of claim 12, wherein the support portion has an axis which is perpendicular to the plane of the pad surface.
Claim 17
Dependent Claim
180 words
A modular hydrodynamic bearing adapted to support a rotating shaft, the bearing comprising: a carrier member, the carrier member having a plurality of openings formed therein, the openings being spaced about a predetermined axis; a plurality of bearing pads secured in the openings of the carrier, each of the bearing pads comprising a pad portion having a pad surface, a supported surface and at least one edge extending between the pad surface and the supported surface a support portion supporting the pad portion at a location on the supported surface that is spaced from every edge of the pad, the support portion having a first end attached to the pad portion and a second end Spaced from the pad portion and a central region between the first and second ends wherein the support portion has a radial width and a circumferential width and where the support structure is curved so as to flare outward toward the first end so that the support portion is both radially and circumferentially wider proximate the first end than it is in the central region.
Claim 18
Dependent Claim
180 words
A modular hydrodynamic bearing adapted to support a rotating shaft, the bearing comprising: a carrier member, the carrier member having a plurality of openings formed therein, the openings being spaced about a predetermined axis; a plurality of bearing pads secured in the openings of the carrier, each of the bearing pads comprising a pad portion having a pad surface, a supported surface and at least one edge extending between the pad surface and the supported surface a support portion supporting the pad portion at a location on the supported surface that is spaced from every edge of the pad, the support portion having a first end attached to the pad portion and a second end Spaced from the pad portion and a central region between the first and second ends wherein the support portion has a radial width and a circumferential width and where the support structure is curved so as to flare outward toward the first end so that the support portion is both radially and circumferentially wider proximate the first end than it is in the central region.
Claim 19
Dependent Claim
30 words
The bearing of claim 14, further comprising a base supporting the support portion and wherein the support portion is also curved so as to flare outward toward the second end.
Claim 20
Dependent Claim
25 words
The bearing of claim 14, wherein the axis of symmetry of the support portion is located radially outward of the geometric center of the pad.
Claim 21
Dependent Claim
16 words
The bearing of claim 14, wherein the pad portion has a lower edge which is tapered.
References Cited (Backward Citations)
US1664878A
Cited
US1991461A
Cited
US2110464A
Cited
US2250546A
Cited
US2347663A
Cited
US2314703A
Cited
US2424028A
Cited
FR1010959A
Cited
GB879116A
Cited
US3001136A
Cited
US3107955A
Cited
US3132908A
Cited
DE1425086A1
Cited
US3160450A
Cited
US3142519A
Cited
US3298751A
Cited
US3384425A
Cited
US3639014A
Cited
US3578827A
Cited
US3677612A
Cited
US3604765A
Cited
US3586401A
Cited
US3899224A
Cited
US3829180A
Cited
US3951475A
Cited
US3944304A
Cited
AU7890275A
Cited
US3930691A
Cited
US4005914A
Cited
US3971602A
Cited
US4178046A
Cited
JPS5356448A
Cited
US4099799A
Cited
US4335925A
Cited
US4227752A
Cited
US4348065A
Cited
US4496251A
Cited
US4668106A
Cited
US4671677A
Cited
EP0206686A2
Cited
US4676668A
Cited
US4699525A
Cited
US4657411A
Cited
US4726695A
Cited
US4738550A
Cited
US5102236A
Cited
WO1988009443A1
Cited
US5125754A
Cited
US5137373A
Cited
US5222815A
Cited
US5255984A
Cited
US4738453A
Cited
EP0324188A1
Cited
US5209579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-02-27 | 1998-08-29 | 1999-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-27 | 2002-08-29 | 2003-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-27 | 2006-08-29 | 2007-02-28 | $7700.00 | Window Closed / Lapsed |