US3694110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersible electric pump arrangements
Assignee: Individual
•
Filing: 1971-12-22
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Granted: 1972-09-26
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Expires: 1991-12-22
Abstract
Abstract This invention relates to an electric pump assembly for use in pumping explosives or dangerous liquids in containers, the assembly comprising a motor, which has a winding submerged in the pumped liquid, wherein the wires of the winding are completely insulated by a covering which resists this liquid, and are extended without a break, at their two ends and guided through sealing means to a junction box, outside the container, in which the electric pump arrangement is suspended in known manner and in a way in which a complete seal is obtained. The preceding characteristic enables the electric pump-motor to be perfectly sealed against the exterior, so that it is possible to circulate the liquid under pressure in the interior of this motor without difficulty, so as to ensure, on the one hand, cooling of the motor and, on the other, feeding of the hydrostatic bearings and a stop for the shaft of the rotor of the electric pump.
Inventors
- 👤 Paul Andre Guinard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:33
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D13/0653; F04D29/00; F04D29/60; F04D29/605; H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/132; H02K9/00; H02K9/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
283 words
An immersible electric pump arrangement intended particularly for use in containers accommodating explosive or dangerous liquids, especially liquefied gas fuels, ammonia or the like, comprising a casing; a vertical shaft; an electric motor in the casing having its winding submerged in the pumped liquid and having a rotor mounted on the upper part of this shaft and a pump having its impeller secured to the lower part of this shaft; a hydrostatic stop disposed between the motor and the pump to support said shaft carrying the rotor of the motor and the impeller of the pump, said stop comprising a plate fixed on said shaft and having a planar annular lower face perpendicular to this shaft; a chamber formed in the casing and communicating with the delivery side of the pump; a part rigidly connected to the casing and disposed in the said chamber, said part having its upper portion formed as a concave spherical bearing; a further part constituting a swivel, held against rotation around the shaft and having a spherical lower portion resting on said bearing portion and a planar annular face presented to the plate rigidly connected to the shaft; a series of recesses uniformly distributed over the planar upper face of the swivel; perforations in the swivel and in the part which supports it for enabling said recesses to communicate with said chamber communicating with the delivery side of the pump to inject the pumped fluid between the upper face of the swivel and the lower face of the plate rigidly connected to the shaft; and an annular gap formed between the swivel and the shaft for the return of the liquid to the intake side of the pump.
Claim 2
Dependent Claim
283 words
An immersible electric pump arrangement intended particularly for use in containers accommodating explosive or dangerous liquids, especially liquefied gas fuels, ammonia or the like, comprising a casing; a vertical shaft; an electric motor in the casing having its winding submerged in the pumped liquid and having a rotor mounted on the upper part of this shaft and a pump having its impeller secured to the lower part of this shaft; a hydrostatic stop disposed between the motor and the pump to support said shaft carrying the rotor of the motor and the impeller of the pump, said stop comprising a plate fixed on said shaft and having a planar annular lower face perpendicular to this shaft; a chamber formed in the casing and communicating with the delivery side of the pump; a part rigidly connected to the casing and disposed in the said chamber, said part having its upper portion formed as a concave spherical bearing; a further part constituting a swivel, held against rotation around the shaft and having a spherical lower portion resting on said bearing portion and a planar annular face presented to the plate rigidly connected to the shaft; a series of recesses uniformly distributed over the planar upper face of the swivel; perforations in the swivel and in the part which supports it for enabling said recesses to communicate with said chamber communicating with the delivery side of the pump to inject the pumped fluid between the upper face of the swivel and the lower face of the plate rigidly connected to the shaft; and an annular gap formed between the swivel and the shaft for the return of the liquid to the intake side of the pump.
Claim 3
Dependent Claim
101 words
An electric pump arrangement according to claim 1, in which said part rigidly connected to the casing and comprising said concave spherical bearing portion has at said bearing portion an annular throat, a radial passage being formed to enable this annular throat to communicate with the chamber communicating with the delivery side of the pump, a removable replaceable nozzle fitting at the inlet to this passage, and perforations formed through the part constituting the swivel at the centers of the recesses in its upper face to enable these recesses to communicate with the annular throat formed in the spherical bearing portion.
Claim 4
Dependent Claim
48 words
An electric pump arrangement according to claim 2, comprising two hydrostatic bearings disposed in the casing, the one above and the other below the rotor of the motor, and means for injecting into these bearings liquid pumped from said chamber communicating with the delivery side of the pump.
References Cited (Backward Citations)
US2888878A
Cited
US3494291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |