US3933416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermatically sealed motor blower unit with stator inside hollow armature
Assignee: Individual
•
Filing: 1945-05-01
•
Granted: 1976-01-20
•
Expires: 1965-05-01
Abstract
Abstract 13. A hermetically sealed motor blower unit comprising, in combination, a sealed housing having a thrust plate mounted therein and having a re-entrant wall forming a central cavity in said housing, a rotor within said housing, said rotor comprising an impeller, a hollow shaft embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said shaft, one or more journal bearings within said housing for supporting the radial load of said shaft and electric motor means for rotating said rotor, said motor means comprising a motor-stator located within said cavity and adapted to cooperate through a portion of said re-entrant wall with a motor-rotor mounted within said hollow shaft, the portion of said re-entrant wall located between said motor-stator and said motor-rotor being made relatively thin to reduce electrical losses, the bearing surfaces of said thrust plate, thrust collar and journal bearings being in communication with the discharge of said impeller, whereby fluid pumped by said impeller can flow directly to said bearing surfaces to lubricate them.
Inventors
- 👤 Khatchik O. Donelian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/056; F04D29/057; F04D25/00; F04D25/02; F04D25/06; F04D25/0606; F04D25/0613; F04D25/062; F04D25/0626; F04D25/08; F04D25/082; F04D29/58; F04D29/5806; F04D29/582; F04D29/584; Y; Y10; Y10S; Y10S417/00; Y10S417/902
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
89 words
An electric motor comprising, in combination, a hollow rotor having an external bearing surface, a motor-stator located within said hollow rotor, a plurality of tiltable bearing shoes having bearing surfaces confronting the external bearing surface of said rotor and adapted to cooperate therewith to support the radial thrust of said rotor, said bearing shoes being radially opposite at least a part of said motor-stator and a motor-rotor mounted on said rotor in operative relationship with respect to said motor-stator, said motor-rotor and said motor-stator cooperating to rotate said rotor.
Claim 2
Dependent Claim
89 words
An electric motor comprising, in combination, a hollow rotor having an external bearing surface, a motor-stator located within said hollow rotor, a plurality of tiltable bearing shoes having bearing surfaces confronting the external bearing surface of said rotor and adapted to cooperate therewith to support the radial thrust of said rotor, said bearing shoes being radially opposite at least a part of said motor-stator and a motor-rotor mounted on said rotor in operative relationship with respect to said motor-stator, said motor-rotor and said motor-stator cooperating to rotate said rotor.
Claim 3
Dependent Claim
99 words
An electric motor comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing, said rotor comprising a motor-rotor embracing said central cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said rotor and a motor-stator mounted in said cavity for cooperating with said motor-rotor to rotate said rotor, the portion of said re-entrant wall between said motor-stator and motor-rotor being made relatively thin to minimize electrical losses in said motor.
Claim 4
Dependent Claim
99 words
An electric motor comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing, said rotor comprising a motor-rotor embracing said central cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said rotor and a motor-stator mounted in said cavity for cooperating with said motor-rotor to rotate said rotor, the portion of said re-entrant wall between said motor-stator and motor-rotor being made relatively thin to minimize electrical losses in said motor.
Claim 5
Dependent Claim
118 words
An electric motor comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing, said rotor comprising a motor-rotor embracing said central cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said rotor, a journal bearing within said housing for supporting the radial load of said rotor, and a motor-stator located within said central cavity and cooperating through a portion of said re-entrant wall with said motor-rotor to rotate said rotor, the portion of said re-entrant wall between said motor-stator and motor-rotor being made relatively thin to reduce electrical losses.
Claim 6
Dependent Claim
118 words
An electric motor comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing, said rotor comprising a motor-rotor embracing said central cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said rotor, a journal bearing within said housing for supporting the radial load of said rotor, and a motor-stator located within said central cavity and cooperating through a portion of said re-entrant wall with said motor-rotor to rotate said rotor, the portion of said re-entrant wall between said motor-stator and motor-rotor being made relatively thin to reduce electrical losses.
Claim 7
Dependent Claim
116 words
An electric motor comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, said thrust plate having a recessed bearing surface, a rotor mounted within said housing, said rotor comprising a motor-rotor embracing said cavity and a thrust collar having a bearing surface adapted to cooperate with said recessed bearing surface to support the axial thrust of said rotor, one or more journal bearings within said housing for supporting the radial load of said rotor, and a motor-stator mounted within said cavity and adapted to cooperate through a relatively thin portion of said re-entrant wall with said motor-rotor to rotate said rotor.
Claim 8
Dependent Claim
116 words
An electric motor comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, said thrust plate having a recessed bearing surface, a rotor mounted within said housing, said rotor comprising a motor-rotor embracing said cavity and a thrust collar having a bearing surface adapted to cooperate with said recessed bearing surface to support the axial thrust of said rotor, one or more journal bearings within said housing for supporting the radial load of said rotor, and a motor-stator mounted within said cavity and adapted to cooperate through a relatively thin portion of said re-entrant wall with said motor-rotor to rotate said rotor.
Claim 9
Dependent Claim
117 words
An electric motor comprising, in combination, a sealed housing having a thrust plate mounted therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing for rotation about a vertical axis, said rotor comprising a motor-rotor embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to form a thrust bearing supporting said rotor, a motor-stator mounted within said cavity and adapted to cooperate through a relatively thin portion of said re-entrant wall with said motor-rotor to rotate said rotor, and lifting means for temporarily lifting said rotor until the speed of said rotor is sufficient to cause said thrust bearing to support said rotor.
Claim 10
Dependent Claim
117 words
An electric motor comprising, in combination, a sealed housing having a thrust plate mounted therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing for rotation about a vertical axis, said rotor comprising a motor-rotor embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to form a thrust bearing supporting said rotor, a motor-stator mounted within said cavity and adapted to cooperate through a relatively thin portion of said re-entrant wall with said motor-rotor to rotate said rotor, and lifting means for temporarily lifting said rotor until the speed of said rotor is sufficient to cause said thrust bearing to support said rotor.
Claim 11
Dependent Claim
156 words
An electric motor comprising, in combination, a sealed housing having a thrust plate mounted therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing for rotation about a vertical axis, said rotor comprising a motor-rotor embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to form a thrust bearing supporting said rotor, a motor-stator mounted within said cavity and adapted to cooperate through said re-entrant wall with said motor-rotor to rotate said rotor, lifting means for temporarily lifting said rotor until the speed of said rotor is sufficient to cause said thrust bearing to support said rotor, said lifitng means comprising a ball bearing adapted to support said rotor, a vertically movable supporting member for supporting said ball bearing, and means for moving said supporting member up and down to cause said ball bearing to engage and disengage said rotor as desired.
Claim 12
Dependent Claim
156 words
An electric motor comprising, in combination, a sealed housing having a thrust plate mounted therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing for rotation about a vertical axis, said rotor comprising a motor-rotor embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to form a thrust bearing supporting said rotor, a motor-stator mounted within said cavity and adapted to cooperate through said re-entrant wall with said motor-rotor to rotate said rotor, lifting means for temporarily lifting said rotor until the speed of said rotor is sufficient to cause said thrust bearing to support said rotor, said lifitng means comprising a ball bearing adapted to support said rotor, a vertically movable supporting member for supporting said ball bearing, and means for moving said supporting member up and down to cause said ball bearing to engage and disengage said rotor as desired.
Claim 13
Dependent Claim
96 words
An electric motor comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor within said housing, said rotor comprising a motor-rotor embracing said re-entrant wall and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said rotor, a motor-stator within said cavity adapted to cooperate through a portion of said re-entrant wall with said motor-rotor to rotate said rotor; and cooling means for cooling said motor-stator and through said re-entrant wall said rotor.
Claim 14
Dependent Claim
96 words
An electric motor comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor within said housing, said rotor comprising a motor-rotor embracing said re-entrant wall and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said rotor, a motor-stator within said cavity adapted to cooperate through a portion of said re-entrant wall with said motor-rotor to rotate said rotor; and cooling means for cooling said motor-stator and through said re-entrant wall said rotor.
Claim 15
Dependent Claim
128 words
An electric motor comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor within said housing, said rotor comprising a motor-rotor embracing said re-entrant wall and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said rotor, a motor-stator within said cavity adapted to cooperate through a relatively thin portion of said re-entrant wall with said motor-rotor to rotate said rotor, and cooling means for cooling said motor-stator, said cooling means comprising a coolant supply conduit for supplying a coolant to the interior of said cavity and to said motor-stator and an axial tube for removing said coolant from the inner portion of said cavity.
Claim 16
Dependent Claim
128 words
An electric motor comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor within said housing, said rotor comprising a motor-rotor embracing said re-entrant wall and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said rotor, a motor-stator within said cavity adapted to cooperate through a relatively thin portion of said re-entrant wall with said motor-rotor to rotate said rotor, and cooling means for cooling said motor-stator, said cooling means comprising a coolant supply conduit for supplying a coolant to the interior of said cavity and to said motor-stator and an axial tube for removing said coolant from the inner portion of said cavity.
Claim 17
Dependent Claim
110 words
An electric motor comprising, in combination, a sealed housing having a re-entrant wall forming a central cavity in said housing, a hollow shaft located in a well of said housing and partially embracing said cavity, motor means for rotating said shaft, said motor means comprising a motor-stator located within said cavity, a motor-rotor mounted on the inner surface of said hollow shaft and a relatively thin diaphragm forming part of said re-entrant wall and located between said motor-stator and motor-rotor, first cooling means for cooling said cavity and through said diaphragm said shaft, and second cooling means for cooling the exterior of said wall and through said wall said shaft.
Claim 18
Dependent Claim
110 words
An electric motor comprising, in combination, a sealed housing having a re-entrant wall forming a central cavity in said housing, a hollow shaft located in a well of said housing and partially embracing said cavity, motor means for rotating said shaft, said motor means comprising a motor-stator located within said cavity, a motor-rotor mounted on the inner surface of said hollow shaft and a relatively thin diaphragm forming part of said re-entrant wall and located between said motor-stator and motor-rotor, first cooling means for cooling said cavity and through said diaphragm said shaft, and second cooling means for cooling the exterior of said wall and through said wall said shaft.
Claim 19
Dependent Claim
164 words
An electric motor comprising, in combination, a sealed housing having a re-entrant wall forming a central cavity in said housing, a hollow shaft located in a well of said housing and partially embracing said cavity, motor means for rotating said shaft, said motor means comprising a motor-stator located within said cavity, a motor-rotor mounted on the inner surface of said hollow shaft and a relatively thin diaphragm forming part of said re-entrant wall and located between said motor-stator and motor-rotor, first cooling means comprising a coolant supply conduit for supplying a coolant to the interior of said cavity and to said motor-stator and an axial tube extending into said cavity for removing coolant from the interior of said cavity, and second cooling means comprising a chamber formed in said housing adjacent said well and coolant inlet and outlet means for supplying coolant to said chamber, said first and second cooling means cooperating to cool said hollow shaft from both the inside and outside thereof.
Claim 20
Dependent Claim
164 words
An electric motor comprising, in combination, a sealed housing having a re-entrant wall forming a central cavity in said housing, a hollow shaft located in a well of said housing and partially embracing said cavity, motor means for rotating said shaft, said motor means comprising a motor-stator located within said cavity, a motor-rotor mounted on the inner surface of said hollow shaft and a relatively thin diaphragm forming part of said re-entrant wall and located between said motor-stator and motor-rotor, first cooling means comprising a coolant supply conduit for supplying a coolant to the interior of said cavity and to said motor-stator and an axial tube extending into said cavity for removing coolant from the interior of said cavity, and second cooling means comprising a chamber formed in said housing adjacent said well and coolant inlet and outlet means for supplying coolant to said chamber, said first and second cooling means cooperating to cool said hollow shaft from both the inside and outside thereof.
Claim 21
Dependent Claim
139 words
A hermetically sealed motor blower unit comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing, said rotor comprising an impeller, a motor-rotor embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said rotor, electric motor means for rotating said rotor, said motor means comprising said motor-rotor, a motor-stator positioned within said cavity and a relatively thin diaphragm forming part of said re-entrant wall and located between said motor-stator and said motor-rotor, the bearing surfaces of said thrust plate and thrust collar being in free communication with the discharge of said impeller, whereby fluid pumped by said impeller can flow directly to said bearing surfaces to lubricate them.
Claim 22
Dependent Claim
139 words
A hermetically sealed motor blower unit comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing, said rotor comprising an impeller, a motor-rotor embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said rotor, electric motor means for rotating said rotor, said motor means comprising said motor-rotor, a motor-stator positioned within said cavity and a relatively thin diaphragm forming part of said re-entrant wall and located between said motor-stator and said motor-rotor, the bearing surfaces of said thrust plate and thrust collar being in free communication with the discharge of said impeller, whereby fluid pumped by said impeller can flow directly to said bearing surfaces to lubricate them.
Claim 23
Dependent Claim
143 words
A hermetically sealed motor blower unit comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing, said rotor comprising an impeller, a hollow shaft embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said shaft, and electric motor means for rotating said rotor, said motor means comprising a motor-stator within said cavity, a motor-rotor mounted in said rotor, and a relatively thin diaphragm forming part of said re-entrant wall and located between said motor-stator and motor-rotor, the bearing surfaces of said thrust plate and thrust collar being in free communication with the discharge of said impeller, whereby fluid pumped by said impeller can flow directly to said bearing surfaces to lubricate them.
Claim 24
Dependent Claim
143 words
A hermetically sealed motor blower unit comprising, in combination, a sealed housing having a thrust plate formed therein and having a re-entrant wall forming a central cavity in said housing, a rotor mounted within said housing, said rotor comprising an impeller, a hollow shaft embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said shaft, and electric motor means for rotating said rotor, said motor means comprising a motor-stator within said cavity, a motor-rotor mounted in said rotor, and a relatively thin diaphragm forming part of said re-entrant wall and located between said motor-stator and motor-rotor, the bearing surfaces of said thrust plate and thrust collar being in free communication with the discharge of said impeller, whereby fluid pumped by said impeller can flow directly to said bearing surfaces to lubricate them.
Claim 25
Dependent Claim
176 words
A hermetically sealed motor blower unit comprising, in combination, a sealed housing having a thrust plate mounted therein and having a re-entrant wall forming a central cavity in said housing, a rotor within said housing, said rotor comprising an impeller, a hollow shaft embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said shaft, one or more journal bearings within said housing for supporting the radial load of said shaft and electric motor means for rotating said rotor, said motor means comprising a motor-stator located within said cavity and adapted to cooperate through a portion of said re-entrant wall with a motor-rotor mounted within said hollow shaft, the portion of said re-entrant wall located between said motor-stator and said motor-rotor being made relatively thin to reduce electrical losses, the bearing surfaces of said thrust plate, thrust collar and journal bearings being in communication with the discharge of said impeller, whereby fluid pumped by said impeller can flow directly to said bearing surfaces to lubricate them.
Claim 26
Dependent Claim
176 words
A hermetically sealed motor blower unit comprising, in combination, a sealed housing having a thrust plate mounted therein and having a re-entrant wall forming a central cavity in said housing, a rotor within said housing, said rotor comprising an impeller, a hollow shaft embracing said cavity and a thrust collar adapted to cooperate with said thrust plate to support the axial thrust of said shaft, one or more journal bearings within said housing for supporting the radial load of said shaft and electric motor means for rotating said rotor, said motor means comprising a motor-stator located within said cavity and adapted to cooperate through a portion of said re-entrant wall with a motor-rotor mounted within said hollow shaft, the portion of said re-entrant wall located between said motor-stator and said motor-rotor being made relatively thin to reduce electrical losses, the bearing surfaces of said thrust plate, thrust collar and journal bearings being in communication with the discharge of said impeller, whereby fluid pumped by said impeller can flow directly to said bearing surfaces to lubricate them.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |