Submerged motor and pump assembly
First Claim
1. In a fuel delivery assembly having a storage tank for the fuel, a superstructure mounted upon the storage tank, a leak detector for receiving fuel to be dispensed from a chamber in the superstructure, the improvement comprising:
- a) an in-line motor and pump assembly for pumping fuel from the storage tank to the compartment;
b) a pipe and an internal conduit defining a first annular passageway for conveying the fuel from said in-line motor and pump assembly to the chamber;
c) said in-line motor and pump assembly including a common shaft for supporting the rotor of said motor and an impeller of said pump;
d) a throat unit defining a throat adapted in configuration to said impeller for conveying the fuel in response to rotation of said impeller;
e) a motor mount assembly for mounting the stator of said motor;
f) a housing in combination with said motor mount assembly for defining a second annular passageway to receive fuel from said throat; and
g) a tube holder attached to said motor mount assembly for channeling flow of fuel from said second annular passageway to said first annular passageway.
1 Assignment
0 Petitions
Accused Products
Abstract
An in-line motor and pump assembly is supported at the bottom of a fuel storage tank by a pipe and an internal concentric conduit for housing electrical conductors extending therewithin to the motor. An impeller, coaxial with the rotor of the motor, draws the fuel into an annular passageway surrounding the stator of the motor. Further passageways convey the fuel to an annular passageway defined between the pipe and the conduit for discharge external of the storage tank. A low pressure environment attendant the inflow of the fuel is used to channel fuel for lubrication and cooling purposes to a lower journal bearing and thrust bearing supporting a common shaft for the impeller and the motor. A high pressure environment attendant outflow of fuel is used to channel fuel for lubrication and cooling purposes to a journal bearing supporting the upper end of the shaft.
23 Citations
30 Claims
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1. In a fuel delivery assembly having a storage tank for the fuel, a superstructure mounted upon the storage tank, a leak detector for receiving fuel to be dispensed from a chamber in the superstructure, the improvement comprising:
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a) an in-line motor and pump assembly for pumping fuel from the storage tank to the compartment;
b) a pipe and an internal conduit defining a first annular passageway for conveying the fuel from said in-line motor and pump assembly to the chamber;
c) said in-line motor and pump assembly including a common shaft for supporting the rotor of said motor and an impeller of said pump;
d) a throat unit defining a throat adapted in configuration to said impeller for conveying the fuel in response to rotation of said impeller;
e) a motor mount assembly for mounting the stator of said motor;
f) a housing in combination with said motor mount assembly for defining a second annular passageway to receive fuel from said throat; and
g) a tube holder attached to said motor mount assembly for channeling flow of fuel from said second annular passageway to said first annular passageway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A motor and pump assembly for conveying fuel from a storage tank to a chamber external to the storage tank, said motor and pump assembly comprising in combination:
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a) a common shaft for supporting a rotor of said motor and an impeller of said pump;
b) a throat unit defining a throat adapted in configuration to said impeller for conveying fuel in response to rotation of said impeller;
c) a motor mount assembly for mounting the stator of said motor;
d) a housing in combination with said motor mount assembly for defining an annular passageway to receive fuel from said throat; and
e) a tube holder for channeling flow of fuel from said annular passageway to a pipe in fluid communication with the chamber. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method for drawing fluid from a tank with a submerged motor and pump assembly, said method comprising the steps of:
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a) drawing a fluid from the tank with an impeller of the pump rotationally mounted within a throat unit;
b) directing the fluid into an annular passageway surrounding the stator of the motor;
c) channeling the fluid from the annular passageway to an outlet; and
d) further conveying the fluid from the outlet into a pipe for discharge external of the tank. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification