Patent ID: 11859795
Assignee: TENNANT COMPANY
Field: Furniture, games (Other fields)
Classification: CPC F  A | IPC A  F

Claim 19:
20. A surface maintenance machine comprising:
a body;
a surface maintenance tool coupled to the body;
processing circuitry supported at the body; and
a light projection mechanism supported at the body and coupled to the processing circuitry, the light projection mechanism including a light housing, a light emitting element within the light housing, a projection lens that is configured to focus light emanating from the light emitting element, and a light diffuser positioned to receive light emanating from the light emitting element,
wherein the light projection mechanism is configured to project light onto a ceiling surface that is above a floor surface along which the surface maintenance machine is configured to perform a surface maintenance task using the surface maintenance tool, and
wherein the light diffuser includes a diffuser housing, wherein the diffuser housing includes a first diffuser housing end, a second diffuser housing end that is opposite the first diffuser housing end, and one or more side walls extending between the first diffuser housing end and the second diffuser housing end, and wherein the one or more side walls include a translucent material through which light received from the light emitting element at the light diffuser is output radially from the light diffuser housing.