Patent US3716309A successfully refreshed from Google Patents.
US3716309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible motor and pump unit
Assignee: Bennett Pump Inc
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Filing: 1971-05-13
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Granted: 1973-02-13
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Expires: 1991-05-13
Abstract
Abstract A motor and pump unit adapted for submerged operations in a body of liquid such as gasoline comprises a cylindrical tube having mounted therein a hermetically sealed motor which is operatively associated with a pump unit disposed at the lower end of the tube. The diameter of the motor is less than the inside diameter of the tube whereby fluid pumped by the pumping unit passes through the annular passageway defined between the motor and the tube, and is conveyed to the conventional piping system of a gasoline dispensing unit. The motor is contained in a fully sealed housing with a lip seal being provided about the drive shaft of the motor to prevent gasoline from entering the motor.
Inventors
- 👤 T Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:02
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/12; F04D29/126
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
279 words
A submersible motor and pump unit adapted for use in a gasoline dispensing system comprising: a cylindrical tube; a motor assembly, including a motor having an output shaft mounted in a cylindrically shaped sealed enclosure, with the motor shaft extending from the enclosure and the diameter of the enclosure being less than the inner diameter of said cylindrical tube, said motor shaft being sealed to said enclosure by means of a flexible lip seal secured to the motor enclosure, said lip seal including a disc-shaped flexible sealing element having a central annular apeRture through which said shaft extends, the diameter of said aperture being less than the diameter of the shaft such that as the shaft rotates a helical line contact seal is achieved in such manner as to prevent foreign materials from entering the internal construction of the motor assembly; means cooperating within the tube as a guide for supporting said motor assembly in the tube, with the motor shaft substantially coaxial with the tube, so as to define a passageway between said motor assembly and the inner surface of the tube; a pump connected to said motor assembly, and including a housing; means cooperating with said pump as a guide for supporting said pump in and substantially proximate to the end of the tube; and said pump housing defining a relatively large opening therein whereby liquid from a body of liquid in which the unit is immersed may be admitted to the submerged pump and motor unit and pumped by the pump past the lip seal, through the passageway between said motor assembly and the inner surface of the tube, and thence to the gasoline dispensing system.
Claim 2
Dependent Claim
279 words
A submersible motor and pump unit adapted for use in a gasoline dispensing system comprising: a cylindrical tube; a motor assembly, including a motor having an output shaft mounted in a cylindrically shaped sealed enclosure, with the motor shaft extending from the enclosure and the diameter of the enclosure being less than the inner diameter of said cylindrical tube, said motor shaft being sealed to said enclosure by means of a flexible lip seal secured to the motor enclosure, said lip seal including a disc-shaped flexible sealing element having a central annular apeRture through which said shaft extends, the diameter of said aperture being less than the diameter of the shaft such that as the shaft rotates a helical line contact seal is achieved in such manner as to prevent foreign materials from entering the internal construction of the motor assembly; means cooperating within the tube as a guide for supporting said motor assembly in the tube, with the motor shaft substantially coaxial with the tube, so as to define a passageway between said motor assembly and the inner surface of the tube; a pump connected to said motor assembly, and including a housing; means cooperating with said pump as a guide for supporting said pump in and substantially proximate to the end of the tube; and said pump housing defining a relatively large opening therein whereby liquid from a body of liquid in which the unit is immersed may be admitted to the submerged pump and motor unit and pumped by the pump past the lip seal, through the passageway between said motor assembly and the inner surface of the tube, and thence to the gasoline dispensing system.
Claim 3
Dependent Claim
279 words
A submersible motor and pump unit adapted for use in a gasoline dispensing system comprising: a cylindrical tube; a motor assembly, including a motor having an output shaft mounted in a cylindrically shaped sealed enclosure, with the motor shaft extending from the enclosure and the diameter of the enclosure being less than the inner diameter of said cylindrical tube, said motor shaft being sealed to said enclosure by means of a flexible lip seal secured to the motor enclosure, said lip seal including a disc-shaped flexible sealing element having a central annular apeRture through which said shaft extends, the diameter of said aperture being less than the diameter of the shaft such that as the shaft rotates a helical line contact seal is achieved in such manner as to prevent foreign materials from entering the internal construction of the motor assembly; means cooperating within the tube as a guide for supporting said motor assembly in the tube, with the motor shaft substantially coaxial with the tube, so as to define a passageway between said motor assembly and the inner surface of the tube; a pump connected to said motor assembly, and including a housing; means cooperating with said pump as a guide for supporting said pump in and substantially proximate to the end of the tube; and said pump housing defining a relatively large opening therein whereby liquid from a body of liquid in which the unit is immersed may be admitted to the submerged pump and motor unit and pumped by the pump past the lip seal, through the passageway between said motor assembly and the inner surface of the tube, and thence to the gasoline dispensing system.
Claim 4
Dependent Claim
279 words
A submersible motor and pump unit adapted for use in a gasoline dispensing system comprising: a cylindrical tube; a motor assembly, including a motor having an output shaft mounted in a cylindrically shaped sealed enclosure, with the motor shaft extending from the enclosure and the diameter of the enclosure being less than the inner diameter of said cylindrical tube, said motor shaft being sealed to said enclosure by means of a flexible lip seal secured to the motor enclosure, said lip seal including a disc-shaped flexible sealing element having a central annular apeRture through which said shaft extends, the diameter of said aperture being less than the diameter of the shaft such that as the shaft rotates a helical line contact seal is achieved in such manner as to prevent foreign materials from entering the internal construction of the motor assembly; means cooperating within the tube as a guide for supporting said motor assembly in the tube, with the motor shaft substantially coaxial with the tube, so as to define a passageway between said motor assembly and the inner surface of the tube; a pump connected to said motor assembly, and including a housing; means cooperating with said pump as a guide for supporting said pump in and substantially proximate to the end of the tube; and said pump housing defining a relatively large opening therein whereby liquid from a body of liquid in which the unit is immersed may be admitted to the submerged pump and motor unit and pumped by the pump past the lip seal, through the passageway between said motor assembly and the inner surface of the tube, and thence to the gasoline dispensing system.
Claim 5
Dependent Claim
38 words
A submersible motor and pump unit as in claim 1 in which the opposite end of the tube is of reduced diameter and is adapted to be connected to a delivery pipe leading to the gasoline dispensing system.
Claim 6
Dependent Claim
20 words
A submersible motor and pump unit as in claim 1 wherein the opening in the pump housing includes a strainer.
Claim 7
Dependent Claim
20 words
A submersible motor and pump unit as in claim 1 wherein the pump includes a plurality of diffusers and impellers.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |