Sam X Liu

US Patent:

20200077855, Mar 12, 2020

Filed:

Sep 6, 2019

Appl. No.:

16/562989

Inventors:

- Needham MA, US
Jason B. THORNE - Dover MA, US
Kai XU - Suzhou, CN
Sam LIU - Needham MA, US
Lee COTTRELL - Needham MA, US

International Classification:

A47L 9/28
A47L 9/32
A47L 5/28

Abstract:

An example of a system, consistent with the present disclosure, may include a motor-battery assembly. The motor-battery assembly may include a housing defining one or more cavities, a suction motor configured to be fluidly coupled to a debris compartment of a vacuum cleaner for generating air flow through the vacuum cleaner for entraining debris, one or more batteries at least partially disposed within at least one of the one or more cavities, and a motor/battery controller at least partially disposed within at least one of the one or more cavities, the motor/battery controller configured to control power provided to the suction motor and to regulate charging and/or discharging of the one or more batteries.

US Patent:

20180296046, Oct 18, 2018

Filed:

Oct 21, 2016

Appl. No.:

15/768879

Inventors:

- Needham MA, US
Daniel MEYER - Boston MA, US
Andre David BROWN - Natick MA, US
Sam LIU - Needham MA, US

International Classification:

A47L 9/04
A47L 9/06

Abstract:

A surface cleaning head with a leading roller may be used to facilitate capturing of debris in the air flow into a suction conduit on the underside of the surface cleaning head. The leading roller is generally positioned adjacent to and in advance of the opening of the suction conduit. The surface cleaning head may have dual agitators—a leading roller and a rotating brush roll—with the leading roller being located in front of the brush roll. The leading roller may have a smaller diameter than the brush roll and may provide a softer cleaning element. The leading roller may also have a bottom portion exposed to the flow path to the suction conduit and at least a top half that is not exposed to that flow path. The leading roller may also float relative to the surface cleaning head and/or may be adjustable relative to the brush roll.