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.

Abstract: An autonomous coverage robot includes a chassis having forward and rearward portions. A drive system is mounted to the chassis and configured to maneuver the robot over a cleaning surface. A cleaning assembly is mounted on the forward portion of the chassis and has two counter-rotating rollers mounted therein for retrieving debris from the cleaning surface, the longitudinal axis of the forward roller lying in a first horizontal plane positioned above a second horizontal plane on which the longitudinal axis of the rearward roller lies. The cleaning assembly is movably mounted to the chassis by a linkage affixed at a forward end to the chassis and at a rearward end to the cleaning assembly. When the robot transitions from a firm surface to a compressible surface, the linkage lifts the cleaning assembly from the cleaning surface.

Abstract: An autonomous mobile robot comprise: a chassis having a drive system in communication with a control system; a cleaning head assembly having a lower cage and mounted to the chassis; a debris collection bin mounted to the chassis; a vacuum airway having a vacuum inlet and an airway outlet positioned adjacent the debris collection bin, and configured to deliver debris from the cleaning head assembly to a debris collection bin, the vacuum airway extending between the cleaning assembly and debris collection bin and being in fluid communication with an impeller disposed within the debris collection bin; and a cleaning head module connected to the chassis and having a front roller including a front shape-changing resilient tube and an adjacent rear roller including a rear shape-changing resilient tube rotatably opposing therewith beneath the vacuum inlet.

Abstract: Acoustic devices that include passive radiators. The passive radiator may include an acoustic driver. The acoustic device may be hand-held or pocket sized.

Abstract: Acoustic devices that include passive radiators. The passive radiator may include an acoustic driver. The acoustic device may be hand-held or pocket sized.