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Class Information
Number: 137/247.21
Name: Fluid handling > With liquid valves or liquid trap seals > Liquid seal in liquid flow line; flow liquid forms seal > Valves > Line condition change responsive > Ball valve
Description: Apparatus in which the valve is a substantially spherical element.

Sub-classes under this class:

Class Number Class Name Patents
137/247.23 Seats vertically up 7

Patents under this class:

Patent Number Title Of Patent Date Issued
8256444 Check ball valve assembly with check ball guide Sep. 4, 2012
7976701 Drain trap Jul. 12, 2011
7854238 Conduit trap and condensation recovery device Dec. 21, 2010
7823601 Drain trap Nov. 2, 2010
7500968 Unidirectional urine collection reservoir Mar. 10, 2009
6192915 Sewerage inlet Feb. 27, 2001
5901731 Reverse osmosis drain coupling and method of installing May. 11, 1999
4726392 Drainage canal Feb. 23, 1988
4614480 Liquid pumping system Sep. 30, 1986

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