Robotic cleaner with sweeper and rotating dusting pads

Patent metadata

Field	Value
Publication number	US-11317779-B2
Application number	US-201816217748-A
Country	US
Kind code	B2
Filing date	Dec 12, 2018
Priority date	Dec 22, 2017
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

An autonomous floor cleaner can include a brush chamber, a brushroll rotatably mounted in the brush chamber, a controller for controlling the operation of the autonomous floor cleaner; and a fluid delivery system with a supply tank and at least one fluid distributor configured to deposit cleaning fluid onto a surface to be cleaned.

First claim

What is claimed is:

1. An autonomous floor cleaner, comprising:
a D-shaped housing;
a brush chamber;
a brushroll rotatably mounted in the brush chamber and wherein the brushroll is located proximate a straight-edge portion of the D-shaped housing;
a controller for controlling the operation of the autonomous floor cleaner; and
a fluid delivery system, comprising:
a supply tank for storing a supply of cleaning fluid;
at least one fluid distributor in fluid communication with the supply tank and configured to deposit cleaning fluid onto a surface to be cleaned; and
a fluid delivery pump configured to control a flow of the cleaning fluid to the at least one fluid distributor;
wherein a pulse width modulation signal powering the pump, from the controller, is further configured to provide a set flowrate of deposited cleaning fluid.

2. The autonomous floor cleaner of claim 1 wherein a housing front is defined by a rounded edge and a housing rear is defined by the straight-edge portion, and wherein a bumper assembly is provided at the housing front along at least a portion of the rounded edge.

3. The autonomous floor cleaner of claim 1 , further comprising an integrated tank assembly including the supply tank and a debris receptacle and selectively removable from the D-shaped housing.

4. The autonomous floor cleaner of claim 1 , further comprises a dusting assembly including at least one rotating pad driven to rotate about a vertical axis with respect to the surface to be cleaned.

5. The autonomous floor cleaner of claim 4 wherein the at least one rotating pad is selectively removable from the dusting assembly.

6. The autonomous floor cleaner of claim 1 , further comprising a debris receptacle fluidly coupled to the brush chamber, wherein dirt swept up by rotation of the brushroll is moved by rotation of the brushroll through the brush chamber and propelled into the debris receptacle.

7. The autonomous floor cleaner of claim 1 , further comprising a drive system for autonomously moving the autonomous floor cleaner over the surface to be cleaned based on inputs from the controller.

8. The autonomous floor cleaner of claim 1 wherein the pulse width modulation signal cyclically energizes the pump for a first predetermined time duration and then de-energizes the pump for a second predetermined time duration.

9. The autonomous floor cleaner of claim 8 wherein the first predetermined time duration is 40 milliseconds and the second predetermined time duration is 2 seconds.

10. The autonomous floor cleaner of claim 1 wherein the set flowrate ranges from 2 milliliters per second to 10 milliliters per second.

11. The autonomous floor cleaner of claim 1 wherein the pulse width modulation signal has a frequency of 50 Hz.

12. A floor cleaning robot, comprising:
an autonomously moveable housing having a front, a rear, a first side, and a second side;
a unitary assembly selectively mounted to the autonomously moveable housing, the unitary assembly comprising:
a brush chamber;
a debris receptacle fluidly coupled to the brush chamber, and
a supply tank for storing a supply of cleaning fluid;

a brushroll having a brush assembly located in the brush chamber;
at least one fluid distributor in fluid communication with the supply tank and configured to deposit cleaning fluid onto a surface to be cleaned; and
a fluid delivery pump configured to control a flow of the cleaning fluid to the at least one fluid distributor;
wherein the unitary assembly is configured to be selectively detached from the autonomously moveable housing by rotating the brush chamber with respect to the autonomously moveable housing and then lifting the unitary assembly to releasably detach the brush chamber from the autonomously moveable housing.

13. The floor cleaning robot of claim 12 wherein a pulse width modulation signal powering the fluid delivery pump is further configured to provide a set flowrate to the at least one fluid distributor.

14. The floor cleaning robot of claim 13 wherein the pulse width modulation signal cyclically energizes the pump for a first predetermined time duration and then de-energizes the pump for a second predetermined time duration.

15. The floor cleaning robot of claim 12 wherein the autonomously moveable housing is D-shaped, and wherein the brushroll is located proximate a straight edge portion of the D-shaped housing.

16. The floor cleaning robot of claim 15 wherein a housing front is defined by a rounded edge of the autonomously moveable housing and a housing rear is defined by the straight edge portion, and wherein a bumper assembly is provided at the front of the housing along at least a portion of the rounded edge.

17. The floor cleaning robot of claim 15 wherein the brushroll is selectively rotatably mounted to the autonomously moveable housing.

18. The floor cleaning robot of claim 12 wherein the debris receptacle includes a receptacle inlet open to the brush chamber such that dirt swept up by rotation of the brush assembly, is moved by rotation of the brush assembly through the brush chamber, and is propelled by rotation of the brush assembly into the debris receptacle through the receptacle inlet, which is directly adjacent the brush chamber.

19. The floor cleaning robot of claim 18 , further comprising a partition having a ramped front surface provided at a bottom of the receptacle inlet to guide debris into the debris receptacle.

Assignees

• Bissell Homecare Inc
• Bissell Inc

Inventors

• Johnson Steve M
• Vantongeren Todd
• Mohan Jake Andrew
• Brown Adam
• Buehler Eric Daniel

Classifications

• A47L11/28

  Floor-scrubbing machines, motor-driven (A47L11/29 takes precedence) · CPC title

• A47L9/04

  with driven brushes or agitators · CPC title

• A47L11/4088 Primary

  Supply pumps; Spraying devices; Supply conduits · CPC title

• A47L11/4011 Primary

  Regulation of the cleaning machine by electric means; Control systems and remote control systems therefor · CPC title

• A47L11/408

  Means for supplying cleaning or surface treating agents · CPC title