Systems, methods, and apparatuses for controlling the power supply of a vacuum cleaner motor

Patent metadata

Field	Value
Publication number	US-9305727-B2
Application number	US-201414178579-A
Country	US
Kind code	B2
Filing date	Feb 12, 2014
Priority date	Feb 12, 2014
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

Applicant has created systems, methods, and apparatuses for controlling the power supply of a vacuum cleaner motor. The systems and apparatuses include pressure taps to detect a pressure differential within a vacuum cleaner, a float that adjusts depending on an amount of liquid stored, and a power switch that toggles based on the pressure differential created by the position of the float. Alternatively, the float can be replaced by an air chamber so that the pressure differential is created by liquid rising above the volume of air trapped in the chamber. The method can include interrupting the current supplied to an electrical circuit of a power switch based upon a pressure differential created within the vacuum. By controlling the power supply to a vacuum cleaner motor based on a pressure differential created by the amount of liquid stored within the vacuum cleaner, the vacuum cleaner can automatically disable the vacuum cleaner's motor as the vacuum approaches its maximum liquid capacity.

First claim

What is claimed is:

1. An apparatus for interrupting a power supply to a vacuum cleaner motor, the apparatus comprising:
an inlet plenum;
at least two pressure taps adapted to detect a pressure differential between a first and second portion of the inlet plenum;
a float adapted to change its position as a function of an amount of liquid stored in a vacuum cleaner;
a power switch adapted to toggle from an “on” position to an “off” position based on the pressure differential between the first and second portion of the inlet plenum; and
a membrane, wherein the membrane is adapted to flex in response to the pressure differential between the first and second portion of the inlet plenum.

2. The apparatus of claim 1 , wherein the first and second portion of the inlet plenum include an area inside the inlet plenum and an area outside the inlet plenum, respectively.

3. The apparatus of claim 1 , wherein the pressure differential is a result of the float contacting at least a portion of the inlet plenum.

4. The apparatus of claim 3 , wherein the float rises and falls as the amount of liquid stored in the vacuum cleaner increases and decreases, respectively.

5. The apparatus of claim 4 , wherein the float rises to contact the at least a portion of the inlet plenum as the amount of liquid stored in the vacuum clean approaches its maximum capacity.

6. The apparatus of claim 1 further comprising a switch actuator and a biasing device, wherein the switch actuator is coupled to the power switch and is further adapted to toggle the power switch depending upon a state of the biasing device.

7. The apparatus of claim 6 , wherein the power switch is toggled from the “on” position to the “off” position when the state of the biasing device is an uncompressed state.

8. An apparatus for interrupting a power supply to a vacuum cleaner motor, the apparatus comprising:
an inlet plenum;
at least two pressure taps adapted to detect a pressure differential between a first and second portion of the inlet plenum;
a float adapted to change its position as a function of an amount of liquid stored in a vacuum cleaner;
a power switch comprising an electrical circuit, wherein a current supply to the electrical circuit is adapted to be interrupted based on the pressure differential between the first and second portion of the inlet plenum; and
a membrane, wherein the membrane is adapted to flex in response to the pressure differential between the first and second portion of the inlet plenum.

9. The apparatus of claim 8 , wherein the first and second portion of the inlet plenum include an area inside the inlet plenum and an area outside the inlet plenum, respectively.

10. The apparatus of claim 8 , wherein the pressure differential is a result of the float contacting at least a portion of the inlet plenum.

11. The apparatus of claim 10 , wherein the float rises and falls as the amount of liquid stored in the vacuum cleaner increases and decreases, respectively.

12. The apparatus of claim 11 , wherein the float rises to contact the at least a portion of the inlet plenum as the amount of liquid stored in the vacuum clean approaches its maximum capacity.

13. The apparatus of claim 8 further comprising a switch shoulder and an actuator, wherein the current supply is adapted to be interrupted depending upon the position of the actuator.

14. The apparatus of claim 13 , wherein the current supply is interrupted when the switch shoulder contacts the actuator.

15. An apparatus for interrupting a power supply to a vacuum cleaner motor, the apparatus comprising:
an air chamber, wherein the pressure of air in the air chamber is adapted to vary as a function of an amount of liquid stored in a vacuum cleaner;
at least two pressure taps adapted to detect a pressure differential between a first and second portion of the vacuum cleaner;
a power switch comprising an electrical circuit, wherein a current supply to the electrical circuit is adapted to be interrupted based on the pressure differential between the first and second portion of the vacuum cleaner; and
a membrane, wherein the membrane is adapted to flex in response to the pressure differential between the first and second areas of the vacuum cleaner.

16. The apparatus of claim 15 , wherein the first and second portion of the vacuum cleaner include an area inside the air chamber and an area outside the air chamber, respectively.

17. The apparatus of claim 15 , wherein the pressure differential increases as the level of liquid stored in the vacuum cleaner increases above the bottom level of air trapped within the air chamber.

Assignees

• Emerson Electric Co

Inventors

• Holsten Stuart V

Classifications

• H01H35/18 Primary

  Switches operated by change of liquid level or of liquid density, e.g. float switch (by magnet carried on a float H01H36/02) · CPC title

• H01H2231/012

  Household appliance · CPC title

• A47L7/0028

  Security means, e.g. float valves or level switches for preventing overflow · CPC title

• A47L5/365

  of the vertical type, e.g. tank or bucket type · CPC title

• A47L9/19

  Means for monitoring filtering operation · CPC title