PNEUMATIC DOOR CLOSER
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United States of America Patent
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N/A
Issued Date -
Sep 30, 2010
app pub date -
Mar 26, 2010
filing date -
Mar 27, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A pneumatic door closer which includes a cylinder which has a first end and an opposed second end; a piston which is slidingly engaged with the cylinder and which is biased towards the first end; a valve plug, a valve seat and a biasing member to bias the valve plug into sealing engagement with the valve seat to regulate the flow of air from the cylinder; and an adjustable assembly associated with the valve plug to vary the biasing force exerted on the valve plug thereby varying level of air pressure required inside the chamber before the valve plug is disengaged from the valve seat so that air is allowed to escape from the cylinder.
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