Reducing cleaning roller amplitude and speed oscillations of a cleaning robot

US11369242B2 · kind B2 · utility

Assignee

• iRobot Corporation · US

Inventors

• Hao-Yun Chow · Kaohsiung, TW
• Patrick Chow · Issaquah, US
• Ke Ting Gao · Lo Wu, CN
• Fangzheng Guo · Arlington, US
• Jennifer Ann Mauger · Arlington, US
• Rogelio Manfred Neumann · Somerville, US
• Jian Yun Pi · Gao'an, CN
• Michael G. Sack · Westford, US
• Rubal Verma · Lowell, US

Key dates

• Filing date: May 11, 2020
• Grant date: Jun 28, 2022
• Expiry date: Jan 27, 2041

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C2314/00
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A roller assembly for a mobile cleaning system for cleaning a work surface can include a drive shaft, a sheath, a bushing, and a bushing shroud. The drive shaft can be rotatable about a drive axis, and the drive shaft can include a driven end and an opposite bushing end. The sheath can be supported by the drive shaft and the sheath can be rotatable with the drive shaft. The sheath can include a shell engageable with the work surface. The bushing can be located about the bushing end of the drive shaft. The bushing shroud can be connected to the bushing. The sheath and the drive shaft can be together rotatable with respect to the bushing and the bushing shroud, the bushing shroud can include an outer portion defining a first radius of curvature and a recessed portion connected to the outer portion.