Door closing mechanism
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United States of America Patent
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Jun 25, 2013
Grant Date -
Sep 8, 2011
app pub date -
Aug 27, 2009
filing date -
Nov 14, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A door closing mechanism which includes a hydraulic rotation damper, having a closed cylinder cavity within a cylinder barrel, a rotational damper shaft which extends into the cylinder cavity, a piston dividing the cylinder cavity into a first side above the piston and a second side below the piston, a one-way valve allowing fluid flow from said first side to said second side of the cylinder cavity, and a fluid passage between said first and second sides of the cylinder cavity, with a flow restrictor, in particular in the form of a needle valve, adjustable through an orifice in the cylinder barrel, wherein said second side of the cylinder cavity and said orifice are at opposite sides of the flow restrictor.
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