A popcorn ceiling scraper includes a scraping head with multiple blades, at least one of which is oriented horizontally in the same plane as the scraping head with other blades extending vertically from the scraping head. The ceiling scraper has a funnel arranged below the scraping head, and the funnel and the scraping head are formed to reach to an edge or juncture between a ceiling and a wall.

A popcorn ceiling scraper includes a scraping head with multiple blades, at least one of which is oriented horizontally in the same plane as the scraping head with other blades extending vertically from the scraping head. The ceiling scraper has a funnel arranged below the scraping head, and the funnel and the scraping head are formed to reach to an edge or juncture between a ceiling and a wall.

A cleaner reduces noise. The cleaner includes a motor, a fan including a number Z of blades and rotatable at a rotational speed N, indicating revolutions per minute, about a rotation axis by the motor, a cover having an inlet located frontward from the fan, and a number V of ribs located in the inlet. The ribs extend in a radial direction from the rotation axis and are arranged in a circumferential direction about the rotation axis. The fan is rotatable to produce noise having a frequency f.sub.NZ of 20,000 Hz or higher, and f.sub.NZ=(m−k×V)×N/60 and m=n×Z+k×V, where n is an order, m is an integer, and k is an integer.

A cleaner reduces noise. The cleaner includes a motor, a fan including a number Z of blades and rotatable at a rotational speed N, indicating revolutions per minute, about a rotation axis by the motor, a cover having an inlet located frontward from the fan, and a number V of ribs located in the inlet. The ribs extend in a radial direction from the rotation axis and are arranged in a circumferential direction about the rotation axis. The fan is rotatable to produce noise having a frequency f.sub.NZ of 20,000 Hz or higher, and f.sub.NZ=(m−k×V)×N/60 and m=n×Z+k×V, where n is an order, m is an integer, and k is an integer.

A robot cleaner comprising: a cleaner body including a controller, the cleaner body having a dust container accommodation part formed therein; a wheel unit mounted in the cleaner body, the wheel unit of which driving is controlled by the controller; and a dust container detachably coupled to the dust container accommodation part, wherein a first opening and a second opening are disposed at the same height in an inner wall of the dust container accommodation part, wherein the dust container includes: an entrance and an exit, disposed side by side along the circumference of the dust container, the entrance and the exit, respectively communicating with the first opening and the second opening when the dust container is accommodated in the dust container accommodation part; and a flow separating part extending downwardly inclined along the inner circumference of the dust container.

A nozzle for use with a surface cleaning device is disclosed that includes a nozzle housing defining a dirty air inlet, at least a first caster coupled to the nozzle housing to allow for movement of the nozzle housing over a surface to be cleaned, and a caster locking arrangement coupled to the nozzle housing. The caster locking arrangement preferably includes at least a first locking member to transition the first caster between a locked configuration and an unlocked configuration, with the locked configuration limiting movement of the nozzle housing along a single axis during cleaning operations, and the unlocked configuration allowing for movement of the nozzle housing along a plurality of axes/directions during cleaning operations.

A vacuum cleaner comprises a housing having a longitudinal axis. A motor-fan assembly is mounted in the housing and arranged to generate an airflow along an airflow path from a dirty air inlet to an air exhaust. A retractable nozzle defines the dirty air inlet and is moveably mounted on the housing. At least a portion of the retractable nozzle is arranged to move between a retracted configuration within the housing and a deployed configuration outside the housing. The portion of the retractable nozzle in the retracted configuration is aligned in a direction along the longitudinal axis and the portion of the retractable nozzle in the deployed configuration is aligned in a direction across the longitudinal axis.

An apparatus and method for monitoring the productivity of a portable machine are provided. The method includes receiving motion data for at least one component of the portable machine from a multi-axis accelerometer, receiving position data for the at least one component from a process parameter sensor communicatively coupled to the at least one component, and determining, based on the received motion data and the received position data that the at least one component is oriented in a predetermined position for productive operation. The method also includes determining an area of productive operation using at least one physical dimension of the at least one component and the received motion data when the at least one component is oriented in the predetermined position for productive operation and incrementing a total area counter based on the determination.

A floor cleaning device includes a floor covering compartment having a cleaning opening, a vacuum generating device, a suction pipe that connects the floor covering compartment to the vacuum generating device so that suction force is applied on the surface covered by the cleaning opening, a cleaning head body that holds the floor covering compartment, and a vibrating device that causes vibration of the floor covering compartment relative to the cleaning head body. The periphery of the cleaning opening is adapted to contact a surface to be cleaned so that a sealed cleaning space is formed inside the floor covering compartment and over the portion of the surface covered by the cleaning opening. Strong negative pressure is built up in the sealed cleaning space to enhance suction efficiency. Vibration temporarily breaks the sealed state to facilitate moving of the floor covering compartment.

A downdraft table for cleaning electronic equipment includes a housing in the form of a cabinet having a grid-like upper surface with openings therein. A fan located within the housing below the upper surface draws air from above the surface downwardly through the grid. An air compressor and compressed air storage tank are also located within the housing below the upper surface for producing a source of compressed air and a hose is connected to the compressed air storage tank and extends upwardly above the upper surface. An air nozzle connected to the hose allows a workman to direct compressed air toward a piece of electronic equipment located on the upper surface. The upper surface preferably includes a turntable that is adapted to support the piece of electronic equipment thereby allowing the equipment to be rotated about a vertical axis as it is being cleaned. In addition, a ground wire is connected to the housing and has a spring clip at the distal end thereof which is adapted to be connected to the piece of electronic equipment for grounding the same.