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A pressure washer is used to remove old paint from a boat. Patio flagstones being pressure washed using a rotary nozzle. Pressure washing or power washing is the use of high-pressure water spray to remove loose paint, mold, grime, dust, mud, and dirt from surfaces and objects such as buildings, vehicles and concrete surfaces.
Elastomeric pumps, also called balloon pumps or ball pumps, are usually used in the medical field to administer liquid drugs such as local anesthetics, analgesics, cytostatics or antibiotics (depending on the therapy). The required pressure for administering the drug comes from the elastomeric layer that is molded inside the pump.
An intra-aortic balloon pump. The intra-aortic balloon pump (IABP) is a mechanical device that increases myocardial oxygen perfusion and indirectly increases cardiac output through afterload reduction. It consists of a cylindrical polyurethane balloon that sits in the aorta, approximately 2 centimeters (0.79 in) from the left subclavian artery. [1]
Electric washing machines were advertised and discussed in newspapers as early as 1904. [14] Alva J. Fisher has been incorrectly credited with the invention of the electric washer. The US Patent Office shows at least one patent issued before Fisher's US patent number 966677 [15] (e.g. Woodrow's US patent number 921195). [16]
Washer or chain pumps were used by the Chinese over 1000 years ago. [5] In the 1980s Reinder van Tijen an inventor and grass roots activist, with the support of the Royal Tropical Institute of Amsterdam, created and began instructing various communities around the world how to make a rope pump from simple available parts using PVC pipes and plastic moldings.
Fig. 2. Pressure curve for an ideal rubber balloon. When air is first added to the balloon, the pressure rises rapidly to a peak. Adding more air causes the pressure to drop. The two points show typical initial conditions for the experiment. When the valve is opened, the balloons move in the direction indicated by the arrows.
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