PISTON ASSEMBLY FOR AN UNLOADER VALVE OF AN AIR COMPRESSOR
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United States of America Patent
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app pub date -
Apr 9, 2015
filing date -
Apr 9, 2015
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Abandoned
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Abstract
A piston assembly is provided for an unloader valve of an air compressor. The assembly comprises an unloader piston having a first bore of a first diameter, and a second bore of a second diameter which is smaller than the diameter of the first bore. The assembly also comprises a coil spring having a central opening, one end portion disposed in the second bore, and an opposite end portion extending into the first bore. The assembly further comprises a balance piston including a head portion sized to be disposed in the first bore, a first stem portion extending from the head portion and having a diameter smaller than the first and second bores, and a second stem portion extending from the first stem portion and extending into the central opening of the coil spring and having a diameter smaller than the first stem portion.
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