Vacuum brush

• US 10,314,449 B2
• Filed: 07/08/2014
• Issued: 06/11/2019
• Est. Priority Date: 02/16/2010
• Status: Active Grant

• Current Assignee: iRobot Corporation
• Original Assignee: iRobot Corporation
• Inventors: Blouin, Matthew
• Primary Examiner(s): Horton, Andrew A
• Application Number:
  US14/325,997
• Publication Number:
  US 20140317879A1
• Time in Patent Office: 1,799 Days
• Field of Search: 15383-392
• CPC Class Codes: A47L 9/0427 Gearing or transmission means therefor
• CPC Class Codes: A47L 9/0455 Bearing means therefor
• CPC Class Codes: A47L 9/0477 Rolls

Abstract

A rotating cleaning element configured to be inserted in a cleaning head compartment of a robotic vacuum, the rotating cleaning element including: a drive end including a drive protrusion configured to engage a drive mechanism of the cleaning head compartment; a bearing end and a shroud configured to surround at least a portion of the bearing end to lessen an amount of hair and similar matter that reaches the bearing; and a central member extending between the bearing end and the drive end.

Claims

1. A cleaning element comprising:

a central member defining a longitudinal axis and having a drive end portion, a bearing end portion, and a brush cage disposed between the drive end portion and the bearing end portion, the bearing end portion comprising;

a cylindrical sleeve; and

a circular flange extending radially outwardly relative to the sleeve; and

a shroud surrounding at least a portion of the bearing end portion, the shroud comprising walls arranged to define an interior space of the shroud;

wherein;

the shroud and the circular flange define a reservoir in the interior space of the shroud;

the bearing end defines a labyrinth passage between the drive end portion and the reservoir at an outer diameter of the circular flange;

the sleeve is a separate constructional element from the circular flange;

the sleeve is mounted on the circular flange;

the cleaning element includes a bearing located in the shroud;

the central member includes a shaft mounted in the bearing to allow rotation between the shaft and the shroud;

the sleeve is interposed between the reservoir and the bearing; and

the sleeve is mounted on the shaft for rotation with the shaft relative to the shroud.

2. The rotating cleaning element of claim 1, wherein the circular flange, the sleeve and the shroud define the reservoir.

3. The cleaning element of claim 2, wherein the shroud comprises:

a first wall disposed generally parallel to the longitudinal axis;

a second wall extending generally perpendicular from the first wall;

a third wall extending generally perpendicular from the second wall; and

a fourth wall extending generally perpendicular from the third wall, the first, second, third and fourth wall defining the interior space of the shroud.

4. The cleaning element of claim 3, wherein the reservoir is defined between the circular flange, the first wall of the shroud, the second wall of the shroud, and the sleeve.

5. The cleaning element of claim 1, wherein the brush cage and the circular flange of the bearing end portion define a recess, the shroud extending over the recess.

6. The cleaning element of claim 5, wherein the bearing end defines the labyrinth passage between the recess and the reservoir at the outer diameter of the circular flange.

7. The cleaning element of claim 1, wherein the circular flange extends generally perpendicular to a rotation axis of the shaft.

8. The cleaning element of claim 1, wherein the central member is a main brush including bristles secured to the brush cage.

9. The cleaning element of claim 1, wherein the central member is a flapper brush.

10. The cleaning element of claim 1 wherein the circular flange is integrally formed with the brush cage.

11. The cleaning element of claim 1 wherein the circular flange is monolithic with the brush cage.

12. The cleaning element of claim 1 wherein:

the shroud has a proximal end proximate the drive end portion;

the cleaning element includes a bearing located in the shroud;

the shroud and the circular flange define the reservoir in the interior space of the shroud between the circular flange and the bearing; and

the labyrinth passage is the only labyrinth passage defined between the proximal end of the shroud and the bearing.

13. The cleaning element of claim 12 wherein the circular flange is integrally formed with the brush cage.

14. The cleaning element of claim 12 wherein the circular flange is monolithic with the brush cage.

15. A cleaning element to provide migration of hair and debris, the cleaning element comprising:

a central member defining a longitudinal axis and having a drive end portion, a bearing end portion, and a brush cage disposed between the drive end portion and the bearing end portion;

a first bearing located on the drive end portion;

a second bearing located on the bearing end portion;

wherein the drive end portion includes;

a first labyrinth passage between the brush cage and the first bearing;

a second labyrinth passage between the first labyrinth passage and the first bearing;

an enlarged first reservoir between the first labyrinth passage and the second labyrinth passage to collect hair and debris that passes through the first labyrinth passage;

an enlarged second reservoir between the second labyrinth passage and first bearing to collect hair and debris that passes through the second labyrinth passage;

wherein the bearing end portion includes;

a third labyrinth passage between the brush cage and the second bearing; and

an enlarged third reservoir between the third labyrinth passage and the second bearing to collect hair and debris that passes through the third labyrinth passage; and

wherein the total number of reservoirs on the drive end portion is greater than the total number of reservoirs on the bearing end portion, and the total number of labyrinth passages on the drive end portion is greater than the total number of labyrinth passages on the bearing end portion, so that hair and debris tend to migrate away from the drive end portion and toward the bearing end portion.

16. The cleaning element of claim 15 wherein:

the total number of reservoirs on the drive end portion is one more than the total number of reservoirs on the bearing end portion; and

the total number of labyrinth passages on the drive end portion is one more than the total number of labyrinth passages on the bearing end portion.

17. The cleaning element of claim 16 wherein:

the total number of reservoirs on the drive end portion is at least two;

the total number of labyrinth passages on the drive end portion at least two;

the total number of reservoirs on the bearing end portion is exactly one; and

the total number of labyrinth passages on the bearing end portion is exactly one.

18. The cleaning element of claim 17 wherein:

the total number of reservoirs on the drive end portion is exactly two;

the total number of labyrinth passages on the drive end portion is exactly two;

the total number of reservoirs on the bearing end portion is exactly one; and

the total number of labyrinth passages on the bearing end portion is exactly one.

19. A cleaning element comprising:

a central member defining a longitudinal axis and having a drive end portion, a bearing end portion, and a brush cage disposed between the drive end portion and the bearing end portion, the bearing end portion comprising;

a cylindrical sleeve; and

a circular flange extending radially outwardly relative to the sleeve; and

a shroud surrounding at least a portion of the bearing end portion, the shroud comprising walls arranged to define an interior space of the shroud;

wherein;

the shroud and the circular flange define a reservoir in the interior space of the shroud;

the bearing end defines a labyrinth passage between the drive end portion and the reservoir at an outer diameter of the circular flange;

the sleeve is a separate constructional element from the circular flange;

the sleeve is mounted on the circular flange;

the circular flange, the sleeve and the shroud define the reservoir;

the shroud comprises;

a first wall disposed generally parallel to the longitudinal axis;

a second wall extending generally perpendicular from the first wall;

a third wall extending generally perpendicular from the second wall; and

a fourth wall extending generally perpendicular from the third wall, the first, second, third and fourth wall defining the interior space of the shroud; and

the sleeve is mounted on the central member for rotation with the central member relative to the shroud.

20. The cleaning element of claim 19, wherein the reservoir is defined between the circular flange, the first wall of the shroud, the second wall of the shroud, and the sleeve.