Cleaner head for a vacuum cleaner

• US 8,776,311 B2
• Filed: 01/10/2013
• Issued: 07/15/2014
• Est. Priority Date: 01/10/2012
• Status: Active Grant

• Current Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Original Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Inventors: Genn, Stuart Lloyd, Lesniowski, Christopher, Courtney, Stephen Benjamin
• Primary Examiner(s): REDDING, DAVID A
• Application Number:
  US13/738,488
• Publication Number:
  US 20130174373A1
• Time in Patent Office: 551 Days
• Field of Search: 153/77, 153/91, 153/92
• US Class Current: 15/377
• CPC Class Codes: A47L 9/04 with driven brushes or agitators
• CPC Class Codes: A47L 9/0411 driven by electric motor
• CPC Class Codes: A47L 9/0438 with gears having orbital motion, e.g. planetary gearing
• CPC Class Codes: A47L 9/0477 Rolls

Abstract

A cleaner head for a vacuum cleaner houses a hollow brush bar mounted for rotation about an axis. This brush bar is driven by a motor housed inside the hollow brush bar, the motor forming part of a drive assembly supported at one end of the cleaner head. The brush bar is arranged for removal from the cleaner head by sliding the brush bar along the axis and out through an opening at the opposite end of the cleaner head and the brush bar is rotatably supported in clearance around the drive assembly by a first bearing, which bearing engages the brush bar in a corresponding axial-sliding fit to allow said sliding removal of the brush bar.

Claims

1. A cleaner head for a vacuum cleaner, the cleaner head housing a hollow brush bar mounted for rotation about an axis, the brush bar being driven by a motor housed inside the hollow brush bar, the motor forming part of a drive assembly fixedly mounted at one end of the cleaner head, the brush bar being arranged to fit around the motor like a sleeve thereby allowing the brush bar to be removed from the cleaner head by sliding the brush bar along the axis and out through an opening at the opposite end of the cleaner head, wherein the brush bar is rotatably supported in clearance around the drive assembly by a first bearing, which bearing engages the brush bar in a corresponding axial-sliding fit so as not to inhibit said sliding removal of the brush bar.

2. The cleaner head of claim 1, wherein the motor drives the brush bar via a drive dog and this drive dog engages the brush bar in a corresponding axial sliding fit so as not to inhibit said sliding removal of the brush bar.

3. The cleaner head of claim 2, wherein the drive dog engages the brush bar at the end opposite the drive assembly.

4. The cleaner head of claim 1, wherein the first bearing is supported on the drive assembly.

5. The cleaner head of claim 1, wherein the first bearing and brush bar engage one another in a splined fit.

6. The cleaner head of claim 1 wherein the first bearing engages the brush bar in a friction fit.

7. The cleaner head of claim 1, wherein the inner race of the first bearing is soft-mounted to the drive assembly to provide a degree of radial compliance between the inner race and the drive assembly.

8. The cleaner head of claim 1, wherein the brush bar is soft-mounted to the outer race of the bearing to provide a degree of radial compliance between the outer race and the brush bar.

9. The cleaner head of claim 7 or claim 8, wherein the soft-mounting is provided by an elastomeric member.

10. The cleaner head of claim 1, wherein a removable end cap is provided at the end of the cleaner head opposite the drive assembly, to allow said sliding removal of the brush bar.

11. The cleaner head of claim 10, wherein the brush bar is additionally supported in use by a second bearing provided in the end cap.

12. The cleaner head of claim 11, wherein the second bearing engages the brush bar in an axial-sliding push-fit.

13. The cleaner head of claim 10, wherein the end cap is secured to the housing via a bayonet-style fitting.

14. A cleaner head for a vacuum cleaner, the cleaner head housing a hollow brush bar mounted for rotation about an axis, the brush bar being driven by a motor housed inside the hollow brush bar, the motor forming part of a drive assembly supported at one end of the cleaner head, the brush bar being arranged to fit around the motor like a sleeve thereby allowing the brush bar to be removed from the cleaner head by sliding the brush bar along the axis and out through an opening at the opposite end of the cleaner head, wherein the brush bar is rotatably supported in clearance around the drive assembly by a first bearing, which bearing engages the brush bar in a corresponding axial-sliding fit so as not to inhibit said sliding removal of the brush bar, wherein a removable end cap is provided at the end of the cleaner head opposite the drive assembly, to allow said sliding removal of the brush bar, and wherein the brush bar is additionally supported in use by a second bearing provided in the end cap.

15. The cleaner head of claim 14, wherein the second bearing engages the brush bar in an axial-sliding push-fit.