Ball valve
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United States of America Patent
Stats
-
Jul 17, 2007
Grant Date -
Nov 24, 2005
app pub date -
May 18, 2005
filing date -
May 19, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ball valve for refrigerating system includes a valve body, a valve seat that fits into the valve body by a screw thread, a valve ball accommodated within the valve body, two plastic sealing elements on both sides of the valve ball, a valve rod connected to the valve ball, and a valve cap on said valve rod. One of the two sealing elements is a first sealing element which is provided with a suitable spring assembly on its periphery. The spring assembly includes at least two springs with ladder-shaped longitudinal sections that are reverse-superimposed. The inside of first sealing element fits well with the surface of said valve ball, while its outside functions as a supporting surface and an acting surface for said spring assembly. The resulting configuration provides a ball valve with a desirable sealing effect.
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