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Class Information
Number: 137/243.6
Name: Fluid handling > With cleaner, lubrication added to fluid or liquid sealing at valve interface > Cleaning or steam sterilizing > Mechanical cleaning > Valve grinding motion of valve on seat > With independent grinding actuator
Description: Devices which are provided with means in addition to and independent of the normal valve actuator for imparting the grinding motion to the valve.

Sub-classes under this class:

Class Number Class Name Patents
137/243.7 Separable 1

Patents under this class:

Patent Number Title Of Patent Date Issued
6446660 Valve assembly with multiple mode actuators Sep. 10, 2002
6273121 Valve seat self cleaning device for alumina production plants Aug. 14, 2001
6119716 Valve Sep. 19, 2000
5992446 Stopper system for vessel orifice Nov. 30, 1999
4465091 Improved self-grinding valve Aug. 14, 1984
4460009 Valve stem actuator Jul. 17, 1984
4346728 Automated dual mode valve actuator Aug. 31, 1982

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