Submersible pool cleaner with integral rechargeable battery
First Claim
1. A self-propelled, submersible pool cleaner comprising:
- a) an integral sealed rechargeable battery;
b) a sealed water pump motor electrically connected to said battery, said motor having a shaft on which is mounted an impeller; and
c) a first portion of an inductive charging assembly electrically connected to said battery, said first portion of the inductive charging assembly being permanently affixed to said pool cleaner, said first portion of the inductive charging assembly having an aperture for receiving a second portion of the inductive charging assembly in mating relation, whereby said battery is recharged by the mating of the first and second portions of the inductive charging assembly and when said second portion is connected to an external power supply.
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Accused Products
Abstract
A submersible robotic pool cleaner is provided with an integral sealed rechargeable battery and an inductive charging assembly, a first portion of which is mounted in the pool cleaner housing and during the charging, receives a second separate portion that is connected by a cable to a conventional power source. The pump motor drive shaft is treated with a specialized anti-friction lubricant composition to minimize frictional energy losses where the shaft contacts the seal(s) and any shaft bearing(s), to maximize efficiency and minimize the power consumption of the pump motor assembly and permit the pool cleaner to completely traverse the surfaces to be cleaned within the fully-charged power capacity of the battery.
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Citations
20 Claims
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1. A self-propelled, submersible pool cleaner comprising:
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a) an integral sealed rechargeable battery;
b) a sealed water pump motor electrically connected to said battery, said motor having a shaft on which is mounted an impeller; and
c) a first portion of an inductive charging assembly electrically connected to said battery, said first portion of the inductive charging assembly being permanently affixed to said pool cleaner, said first portion of the inductive charging assembly having an aperture for receiving a second portion of the inductive charging assembly in mating relation, whereby said battery is recharged by the mating of the first and second portions of the inductive charging assembly and when said second portion is connected to an external power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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- 11. A battery-powered submersible pool cleaner comprising a pool cleaner housing, an integral rechargeable battery secured to said housing and an inductive charging assembly, at least one portion of which is secured to said housing and electrically connected to the battery.
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16. A method for improving the efficiency of an electric motor contained in a waterproof motor housing having at least one drive shaft extending through a waterproof seal in said motor housing, the method comprising the steps of heating the drive shaft to a temperature of about 40°
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applying a liquid automotive crankcase antifriction lubricant additive to the shaft;
heating the coated shaft to a temperature of about 80°
C.;
cooling the shaft to ambient temperature;
assembling the drive shaft to the motor; and
placing the seal on the drive shaft. - View Dependent Claims (17, 18, 19)
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20. A method of improving the overall operating efficiency of an electric motor-powered assembly, the assembly comprising an electric motor, a drive shaft connected to the motor, a driven unit connected to the drive shaft and one or more contact units through which the drive shaft passes axially, the contact units selected from the group consisting of seals bearings and journals, the method comprising the steps of:
- heating the drive shaft to a temperature of about 40°
;
applying a liquid automotive crankcase antifriction lubricant additive to the shaft;
heating the coated shaft to a temperature of about 80°
C.;
cooling the shaft to ambient temperature;
assembling the drive shaft to the motor; and
placing the seal on the drive shaft.
- heating the drive shaft to a temperature of about 40°
Specification