Reciprocating machines

A reciprocating machine such as a vacuum pump includes a cylinder in which a reciprocating piston is disposed for reciprocating movement. A variable voltage driver is provided for driving the piston and a vibration sensor is provided for sensing contact between the piston and ends of the cylinder. A...

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Hauptverfasser:	Dovey, Stephen J, Shelley, Gerald R, Stones, Ian D
Format:	Patent
Sprache:	eng
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creator	Dovey, Stephen J Shelley, Gerald R Stones, Ian D
description	A reciprocating machine such as a vacuum pump includes a cylinder in which a reciprocating piston is disposed for reciprocating movement. A variable voltage driver is provided for driving the piston and a vibration sensor is provided for sensing contact between the piston and ends of the cylinder. A controller interconnects the sensor and driver to control movement of the driver and piston to maximize piston stroke and reduce if not eliminate contacting of the piston with the cylinder.
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title	Reciprocating machines
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