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Positive airway pressure (PAP) is a mode of respiratory ventilation used in the treatment of sleep apnea.PAP ventilation is also commonly used for those who are critically ill in hospital with respiratory failure, in newborn infants (), and for the prevention and treatment of atelectasis in patients with difficulty taking deep breaths.
Belt Pulley magazine was founded in 1987 by Kurt Aumann of Nokomis, Illinois.Aumann was only 17 years of age when he first started publishing the magazine. In 1998, Jane Aumann took over primary responsibility for the editing of the magazine as Kurt sought to build his auctioneering business called Aumann Auctions Inc. [1]
In 1974, the Dixon company coined the term zero-turn radius on their entrance into the mower market. [1] In 2009, the Hustler Zeon became the first fully electric zero-turn mower, with four 12-volt lead acid batteries. As of 2023 most fully electric zero turn mowers use lithium ion batteries ranging from 40 to 80 volts. [2] [3]
Round belts are a circular cross section belt designed to run in a pulley with a 60 degree V-groove. Round grooves are only suitable for idler pulleys that guide the belt, or when (soft) O-ring type belts are used. The V-groove transmits torque through a wedging action, thus increasing friction.
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CPAP machines possess a motor that pressurizes room temperature air and delivers it through a hose connected to a mask or tube worn by the patient. This constant stream of air opens and keeps the upper airway unobstructed during inhalation and exhalation. [1] Some CPAP machines have other features as well, such as heated humidifiers.
The development of heated humidified high flow started in 1999 with Vapotherm introducing the concept of high flow use with race horses. [2]High flow was approved by the U.S. Food and Drug Administration in the early 2000s and used as an alternative to positive airway pressure for treatment of apnea of prematurity in neonates. [3]
Serpentine belt (foreground) and dual vee belt (background) on a bus engine Belt tensioner providing pressure against the back of a serpentine belt in an automobile engine. A serpentine belt (or drive belt [1]) is a single, continuous belt used to drive multiple peripheral devices in an automotive engine, such as an alternator, power steering pump, water pump, air conditioning compressor, air ...