US4672249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible electric motor having floating bearings
Assignee: Ebara Corp
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Filing: 1985-12-20
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Granted: 1987-06-09
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Expires: 2005-12-20
Abstract
Abstract A submersible electric motor for use in submersible pump or the like, in which an upright motor shaft is supported by upper and lower thrust bearings for supporting upward and downward thrust loads, respectively, and thrust pads of the upper and the lower thrust bearings receive upper and lower slide contact members secured to the motor shaft in its upper and lower portions, and in which resilient means such as coil springs or rubber bushings bias the thrust pads of the upper thrust bearing, suspension mounted to the motor frame, towards the upper thrust contact member secured to the motor shaft. This thrust bearing for supporting an upward thrust given to the motor shaft may be applicable to various electric motors.
Inventors
- 👤 Minoru Iwata
- 👤 Nobuyuki Kuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:38
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1672; F; F16; F16C; F16C17/00; F16C17/04; F16C17/06; H02K5/12; H02K5/132
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
72 words
A thrust bearing for supporting an upward thrust given to an upright motor shaft of an electric motor, comprising: thrust pads of the thrust bearing, suspension mounted to a frame of the electric motor; and resilient means for biasing the thrust pads of the thrust bearing towards a slide contact member secured to the motor shaft, wherein said slide contact member comprises an annular carbon thrust plate and an annular thrust disc.
Claim 2
Dependent Claim
72 words
A thrust bearing for supporting an upward thrust given to an upright motor shaft of an electric motor, comprising: thrust pads of the thrust bearing, suspension mounted to a frame of the electric motor; and resilient means for biasing the thrust pads of the thrust bearing towards a slide contact member secured to the motor shaft, wherein said slide contact member comprises an annular carbon thrust plate and an annular thrust disc.
Claim 3
Dependent Claim
119 words
A submersible electric motor for use in submersible pump, in which an upright motor shaft is supported by upper and lower thrust bearings for supporting upward and downward thrust loads, respectively, and thrust pads of the upper and lower thrust bearings receive upper and lower slide contact members secured to the motor shaft in its upper and lower portions, the improvement comprising: thrust pads of the upper thrust bearing, suspension mounted to a frame of the electric motor; and resilient means for biasing the thrust pads of the upper thrust bearing towards the upper slide contact member secured to the motor shaft, wherein said upper slide contact member comprises an annular carbon thrust plate and an annular thrust disc.
Claim 4
Dependent Claim
119 words
A submersible electric motor for use in submersible pump, in which an upright motor shaft is supported by upper and lower thrust bearings for supporting upward and downward thrust loads, respectively, and thrust pads of the upper and lower thrust bearings receive upper and lower slide contact members secured to the motor shaft in its upper and lower portions, the improvement comprising: thrust pads of the upper thrust bearing, suspension mounted to a frame of the electric motor; and resilient means for biasing the thrust pads of the upper thrust bearing towards the upper slide contact member secured to the motor shaft, wherein said upper slide contact member comprises an annular carbon thrust plate and an annular thrust disc.
Claim 5
Dependent Claim
195 words
A submersible electric motor for use in submersible pump, in which an upright motor shaft is supported by upper and lower thrust bearings for supporting upward and downward thrust loads, respectively, and thrust pads of the upper and lower thrust bearings receive upper and lower slide contact members secured to the motor shaft in its upper and lower portions, the improvement comprising: thrust pads of the upper thrust bearing, suspension mounted to a frame of the electric motor; and resilient means for biasing the thrust pads of the upper thrust bearing towards the upper slide contact member secured to the motor shaft, wherein each thrust pad is suspension mounted to the lower end of a boss portion of an upper bracket through leg members, each said leg member having a slot in one end thereof projecting into an annular peripheral groove formed in the lower end of the boss portion of the upper bracket through holes formed in an annular projection of said lowermost end of the boss portion of the upper bracket, and a resilient string ring disposed within the annular peripheral groove of the upper bracket through the slots of the leg members.
Claim 6
Dependent Claim
195 words
A submersible electric motor for use in submersible pump, in which an upright motor shaft is supported by upper and lower thrust bearings for supporting upward and downward thrust loads, respectively, and thrust pads of the upper and lower thrust bearings receive upper and lower slide contact members secured to the motor shaft in its upper and lower portions, the improvement comprising: thrust pads of the upper thrust bearing, suspension mounted to a frame of the electric motor; and resilient means for biasing the thrust pads of the upper thrust bearing towards the upper slide contact member secured to the motor shaft, wherein each thrust pad is suspension mounted to the lower end of a boss portion of an upper bracket through leg members, each said leg member having a slot in one end thereof projecting into an annular peripheral groove formed in the lower end of the boss portion of the upper bracket through holes formed in an annular projection of said lowermost end of the boss portion of the upper bracket, and a resilient string ring disposed within the annular peripheral groove of the upper bracket through the slots of the leg members.
Claim 7
Dependent Claim
18 words
A submersible electric motor as defined in claim 2 or 3, wherein the resilient means comprise coil springs.
Claim 8
Dependent Claim
18 words
A submersible electric motor as defined in claim 2 or 3, wherein the resilient means comprise rubber bushings.
Claim 9
Dependent Claim
26 words
A submersible elecric motor as defined in claim 2, wherein an annular shim is interposed between the annular carbon thrust plate and the annular thrust disk.
Claim 10
Dependent Claim
149 words
A thrust bearing for supporting an upward thrust given to an upright motor shaft of an electric motor, comprising: thrust pads of the thrust bearing, suspension mounted to a frame of the electric motor; and resilient means for biasing the thrust pads of the thrust bearing towards a slide contact member secured to the motor shaft, wherein each thrust pad is suspension mounted to the lower end of a boss portion of an upper bracket through leg members, each said leg member having a slot in one end thereof projecting into an annular peripheral groove formed in the lower end of the boss portion of the upper bracket through holes formed in an annular projection of the lowermost end of the boss portion of the upper bracket, and a resilient string ring disposed within the annular peripheral groove of the upper bracket through the slots of the leg members.
Claim 11
Dependent Claim
149 words
A thrust bearing for supporting an upward thrust given to an upright motor shaft of an electric motor, comprising: thrust pads of the thrust bearing, suspension mounted to a frame of the electric motor; and resilient means for biasing the thrust pads of the thrust bearing towards a slide contact member secured to the motor shaft, wherein each thrust pad is suspension mounted to the lower end of a boss portion of an upper bracket through leg members, each said leg member having a slot in one end thereof projecting into an annular peripheral groove formed in the lower end of the boss portion of the upper bracket through holes formed in an annular projection of the lowermost end of the boss portion of the upper bracket, and a resilient string ring disposed within the annular peripheral groove of the upper bracket through the slots of the leg members.
Claim 12
Dependent Claim
16 words
A bearing as defined in claim 3 or 7, wherein the resilient means comprise coil springs.
Claim 13
Dependent Claim
16 words
A bearing as defined in claim 3 or 7, wherein the resilient means comprise rubber bushings.
Claim 14
Dependent Claim
24 words
A bearing as defined in claim 3, wherein an annular shim is interposed between the annular carbon thrust plate and the annular thrust disk.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |