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Train-mounted vacuum system for track cleaning (France) The performance of a vacuum cleaner can be measured by several parameters: Airflow, in litres per second [l/s] or cubic feet per minute (CFM or ft 3 /min) Air speed, in metres per second [m/s] or miles per hour [mph] Suction, vacuum, or water lift, in pascals [Pa] or inches of water
This is a list of vacuum cleaners and robot vacuum cleaner manufacturers. A vacuum cleaner is a device that uses an air pump to create a partial vacuum to suck up dust and dirt, usually from floors, and optionally from other surfaces as well. The dirt is gathered by either a dustbag or a rigid cartridge, which may be emptied and reused.
The Speed Queen brand was created in 1928 with the introduction of stainless steel wash tubs in 1939 [10] and automatic washers and dryers in 1952. [11] Eventually Barlow & Seelig was renamed Speed Queen Company, and was later purchased by McGraw-Edison. In 1979, McGraw-Edison sold its appliance division to Raytheon Company.
Speed Queen is a laundry machine manufacturer headquartered in Ripon, Wisconsin, United States. Speed Queen is a subsidiary of Alliance Laundry Systems LLC, which billed itself as the world's largest manufacturer of commercial laundry equipment as of 2004.
Vacuum cleaners Fantom Technologies, Inc. was a Canadian household appliance company founded in Welland, Ontario in 1986 as IONA Appliances, with offices in Buffalo, New York , U.S. A manufacturer of dual- cyclonic type vacuum cleaners , they were inspired from the Dyson vacuums (which would not appear in North America until 2002).
Compressible flow (or gas dynamics) is the branch of fluid mechanics that deals with flows having significant changes in fluid density.While all flows are compressible, flows are usually treated as being incompressible when the Mach number (the ratio of the speed of the flow to the speed of sound) is smaller than 0.3 (since the density change due to velocity is about 5% in that case). [1]
The whirling frequency of a symmetric cross section of a given length between two points is given by: = where: E = Young's modulus, I = second moment of area, m = mass of the shaft, L = length of the shaft between points.
In fluid dynamics, Stokes' law gives the frictional force – also called drag force – exerted on spherical objects moving at very small Reynolds numbers in a viscous fluid. [1] It was derived by George Gabriel Stokes in 1851 by solving the Stokes flow limit for small Reynolds numbers of the Navier–Stokes equations .