Definitions
from The Century Dictionary.
- noun A valve located in a piston.
- noun A reciprocating valve resembling a working piston, moved in a tubular passage to open or close a port or ports for alternately admitting steam to or exhausting it from the cylinder of an engine.
Etymologies
Sorry, no etymologies found.
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Examples
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When the exhaust valve closes, the cylinder has a charge of fresh air, drawn in through the exhaust valve, and the further motion of the piston causes a partial vacuum; by the time the piston reaches bottom dead centre the piston-valve has moved up to give communication between the cylinder and the crank case, therefore the mixture is drawn into the cylinder.
A History of Aeronautics Evelyn Charles Vivian 1914
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It had been made from a bicycle foot-pump, by reversing the piston-valve, and was fitted with a glass nozzle and a small detachable glass receiver for collecting the dust, at the end of a flexible metal tube.
John Thorndyke's Cases related by Christopher Jervis and edited by R. Austin Freeman 1902
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