To meet the intense demands of manufacturing, engineering, and research and development, H-P has three state-of-the-art manufacturing facilities in Ohio totaling over 300,000 square feet.

Dirt Devil

Geier Company - in 1905. Geier joined forces with manufacturing companies for military production during World War II before merging with Royal Appliance Manufacturing. In 1984, Royal introduced the Dirt Devil Hand Vac - a huge hit across the country - and the rest is history.

Hoover, Dirt Devil, Royal, and now Oreck are all owned by TTI ( techtronic Industries ) of China. In an effort to make an ever cheaper vacuum cleaner that will satisfy the high volume need of mass merchant stores, or “big box” stores as some call them, the brand loyalty goes out the window because of premature failure.

In Southwestern folklore, the dust devil attains hellish status. According to Rafaela Castro's book, Chicano Folklore, “A prevalent character in the folklore of the Southwest, the devil is more commonly known as el Diablo.” “Dancing devil” and “dirt devil” are terms for a dust devil in the Southwest.

And it has flexible edges. So you can clean right up against baseboards. When you're done toss the washable microfiber pad into the wash.

How do Dust Devils Form? s the air rises, it cools and eventually will descend back through the center of the vortex. Under optimal conditions, a balance between the hot air rising along the outer wall of the vortex and the cooler air sinking in the vortex occurs.

History. The vacuum cleaner evolved from the carpet sweeper via manual vacuum cleaners. The first manual models, using bellows, were developed in the 1860s, and the first motorized designs appeared at the turn of the 20th century, with the first decade being the boom decade.

The first vacuum-cleaning device to be portable and marketed at the domestic market was built in 1905 by Walter Griffiths, a manufacturer in Birmingham, England.

What is a Dust Devil? A common wind phenomenon that occurs throughout much of the world, including Arizona, are dust devils. An example of a dust devil can be seen to the left. These dust-filled vortices, created by strong surface heating, are generally smaller and less intense than a tornado.

Dust devils form when hot air at the surface begins to rise rapidly with much cooler air above it and higher up into the atmosphere. The hot air then stretches and causes a spinning motion much like a tornado. They are short-lived because cold air eventually gets pulled in and dissipates the dust devil.

The dust sensor indicates the amount of dust the vacuum cleaner is picking up in a given area, which can help you clean a room more efficiently. The dust sensor is activated automatically when the cleaner runs and is turned off when the cleaner is stopped.