Michael E Sack

US Patent:

20220313037, Oct 6, 2022

Filed:

Jun 22, 2022

Appl. No.:

17/846484

Inventors:

- Bedford MA, US
Patrick Chow - Santa Clarita CA, US
Ke Ting Gao - Shenzhen, CN
Fangzheng Guo - Arlington MA, US
Jennifer Ann Mauger - Arlington MA, US
Rogelio Manfred Neumann - Somerville MA, US
Jian Yun Pi - GaoAn City, CN
Michael G. Sack - Westford MA, US
Rubal Verma - Lowell MA, US

International Classification:

A47L 9/04
A46B 13/02
A46B 13/00

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.

US Patent:

20200352402, Nov 12, 2020

Filed:

May 11, 2020

Appl. No.:

16/871149

Inventors:

- Bedford MA, US
Patrick Chow - Santa Clarita CA, US
Ke Ting Gao - Shenzhen, CN
Fangzheng Guo - Arlington MA, US
Jennifer Ann Mauger - Arlington MA, US
Rogelio Manfred Neumann - Somerville MA, US
Jian Yun Pi - GaoAn City, CN
Michael G. Sack - Westford MA, US
Rubal Verma - Lowell MA, US

International Classification:

A47L 9/04
A46B 13/00
A46B 13/02

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.