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Class Information
Number: 137/55
Name: Fluid handling > Speed responsive valve control > Centrifugal mass type (exclusive of liquid) > Periodically actuated valve
Description: Control systems wherein the valves or valve are periodically and continually opened and closed, the governor being effective to vary the period and/or the extent of opening.

Patents under this class:

Patent Number Title Of Patent Date Issued
8271141 Control valve system with cycle monitoring, diagnostics and degradation prediction Sep. 18, 2012
7503203 Rotary valve and analytical chromatographic system using the same Mar. 17, 2009
6491105 Cross-over housing for gas lift valve Dec. 10, 2002
6154144 Auto shutoff overflow controller Nov. 28, 2000
5752483 Governor arrangement May. 19, 1998

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