IP Library › Granted Patent US 12,220,096
Granted Patent B2
US 12,220,096 · App. 17/966,317 · Granted Feb 11, 2025

Robotic vacuum cleaning system

Inventors: Duane Leigh Gilbert, Jr. (Goffstown, NH); Faruk Halil Bursal (Lexington, MA); Richard Joseph Therrien (Duxbury, MA); Russell Walter Morin (Burlington, MA)
Assignee: iRobot Corporation
A47L11/4041A47L7/02A47L9/0477A47L9/066A47L11/24A47L11/4013A47L11/4027A47L11/4061A47L11/4063B25J11/0085A47L9/0494A47L9/0666A47L9/2821A47L11/40A47L2201/00A47L2201/028A47L2201/04A47L2201/06Y10S901/01
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Quick Facts
Patent No.
US 12,220,096
App. No.
17/966,317
Granted
Feb 11, 2025
Kind
B2
Abstract

An autonomous coverage robot includes a cleaning assembly having forward roller and rearward rollers counter-rotating with respect to each other. The rollers are arranged to substantially maintain a cross sectional area between the two rollers yet permitting collapsing therebetween as large debris is passed. Each roller includes a resilient elastomer outer tube and a partially air-occupied inner resilient core configured to bias the outer tube to rebound. The core includes a hub and resilient spokes extending between the inner surface of the outer tube and the hub. The spokes suspend the outer tube to float about the hub and transfer torque from the hub to the outer tube while allowing the outer tube to momentarily deform or move offset from the hub during impact with debris larger than the cross sectional area between the two rollers.

Claims (50)

1. A mobile cleaning robot comprising:

a body;

a drive system connected to the body and operable to move the mobile cleaning robot within an environment;

a vacuum system connected to the body and operable to produce an air stream to extract debris from a flooring surface of the environment;

a cleaning head connected to the body, the cleaning head comprising:

a housing at least partially defining an inlet and an outlet; and

a roller supported by the housing and rotatable with respect to the housing to move debris from the inlet to the outlet, the roller and the housing together movable with respect to the body and the flooring surface;

a frame connected to the body, the cleaning head connected to the frame and movable with respect to the frame; and

a linkage connected to the frame and connected to the housing, the linkage configured to enable movement of the roller and the housing with respect to the body.

2. The mobile cleaning robot of claim 1 , wherein the linkage is a four-bar linkage.

3. The mobile cleaning robot of claim 1 , further comprising:

a first link connected to the frame and connected to a lower portion of a first lateral side of the housing;

a second link connected to the frame and connected to an upper portion of the first lateral side of the housing;

a third link connected to the frame and connected to a lower portion of a second lateral side of the housing; and

a fourth link connected to the frame and connected to a lower portion of the second lateral side of the housing.

4. The mobile cleaning robot of claim 3 , wherein the first link includes a bend.

5. The mobile cleaning robot of claim 3 , wherein the second link is substantially straight.

6. The mobile cleaning robot of claim 3 , wherein the second link is a wire.

7. The mobile cleaning robot of claim 6 , wherein the wire forms an L-shape.

8. The mobile cleaning robot of claim 3 , further comprising:

a gearbox supporting the roller and at least partially defining the housing, at least one of the second link and the fourth link connected to the gearbox.

9. A mobile cleaning robot movable within an environment comprising:

a body;

a vacuum system connected to the body and operable produce an air stream to extract debris from a flooring surface of the environment; and

a cleaning head connected to the body, the cleaning head comprising:

a housing at least partially defining an inlet and an outlet; and

a pair of rollers supported by the housing and rotatable with respect to the housing to extract debris from the environment, the pair of rollers and the housing together movable with respect to the body and the flooring surface;

a frame connected to the body, the cleaning head connected to the frame and movable with respect to the frame; and

a linkage connected to the frame and connected to the housing, the linkage configured to enable movement of the pair of rollers and the housing with respect to the body.

10. The mobile cleaning robot of claim 9 , further comprising:

a central plenum connected to the outlet of the cleaning head and connected to the vacuum system, the central plenum configured to flex to allow the roller housing to move with respect to the body.

11. The mobile cleaning robot of claim 10 , wherein the central plenum is made of an elastomer.

12. The mobile cleaning robot of claim 10 , wherein at least a portion of the central plenum is configured to flex, vertically, by between 4 millimeters and 6 millimeters.

13. The mobile cleaning robot of claim 12 , wherein the linkage is a four-bar linkage.

14. The mobile cleaning robot of claim 13 , further comprising:

a first link connected to the frame and connected to a lower portion of a first lateral side of the housing;

a second link connected to the frame and connected to an upper portion of the first lateral side of the housing;

a third link connected to the frame and connected to a lower portion of a second lateral side of the housing; and

a fourth link connected to the frame and connected to a lower portion of the second lateral side of the housing.

15. The mobile cleaning robot of claim 14 , wherein the first link includes a bend.

16. The mobile cleaning robot of claim 14 , wherein the second link is substantially straight.

17. A mobile cleaning robot comprising:

a body;

a drive system connected to the body and operable to move the mobile cleaning robot within an environment;

a vacuum system connected to the body and operable to produce an air stream to extract debris from a flooring surface of the environment;

a cleaning head connected to the body, the cleaning head comprising:

a housing at least partially defining an inlet and an outlet; and

a roller supported by the housing and rotatable with respect to the housing to move debris from the inlet to the outlet, the roller and the housing together movable with respect to the body and the flooring surface;

a frame connected to the body, the cleaning head connected to the frame and movable with respect to the frame; and

a linkage connected to the frame and connected to the housing, the linkage configured to enable translation of the roller and the housing with respect to the body.

Assignments (5)
NOTICE OF ASSIGNMENT OF SECURITY INTEREST IN INTELLECTUAL PROPERTY Recorded Nov 25, 2025
From: TCG SENIOR FUNDING L.L.C., AS COLLATERAL AGENT
To: SANTRUM HONG KONG CO., LIMITED, AS SUCCESSOR COLLATERAL AGENT
Reel/Frame 073707/0516 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 23, 2024
From: GILBERT, DUANE LEIGH, JR.; BURSAL, FARUK HALIL; THERRIEN, RICHARD JOSEPH; MORIN, RUSSELL WALTER
To: IROBOT CORPORATION
Reel/Frame 068058/0714 →
SECURITY INTEREST Recorded Aug 9, 2023
From: IROBOT CORPORATION
To: TCG SENIOR FUNDING L.L.C., AS COLLATERAL AGENT
Reel/Frame 064532/0856 →
RELEASE OF SECURITY INTEREST Recorded Jul 31, 2023
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
To: IROBOT CORPORATION
Reel/Frame 064431/0136 →
SECURITY INTEREST Recorded Jan 18, 2023
From: IROBOT CORPORATION
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 062407/0379 →
Continuity (8)
Continuation 16531471 · Aug 5, 2019
Continuation 15590411 · May 9, 2017
Continuation 14947826 · Nov 20, 2015
Continuation 14588077 · Dec 31, 2014
Continuation 14302469 · Jun 12, 2014
Continuation 13460261 · Apr 30, 2012
Provisional Application 61481147 · Apr 29, 2011
Related Publication 20230042453A1 · Feb 9, 2023
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