Electromagnetically energized actuator
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United States of America Patent
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-
Oct 19, 2004
Grant Date -
Jun 12, 2003
app pub date -
Dec 7, 2001
filing date -
Dec 7, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electromagnetically energized actuator featuring low friction, low wear, low impact and low noise attributes. The actuator includes a polymer tube, a stop fixedly disposed in the tube and composed of a highly permeable material, a plunger reciprocably disposed within the tube and composed of a highly permeable material, a spring assembly including a spring which is formed at the facing ends the stop and the plunger which spring serves to bias the plunger away from the stop, a first plate composed of a highly permeable material which is connected to a first end of the tube, and a second plate composed of a highly permeable material which is connected to a second end of the tube. The tube is composed of a polymer which (relative to a conventional brass tube) allows tighter tolerances between the plunger and the tube resulting in lower wear, less sliding noise, reduction in corrosion, and elimination of thinned end of the tube. The preferred tube polymer is VESPEL.RTM. with TEFLON.RTM. mixture.
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