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Class Information
Number: 137/247.49
Name: Fluid handling > With liquid valves or liquid trap seals > Liquid seal in liquid flow line; flow liquid forms seal > U-seals > Even diameter legs
Description: Seals wherein both legs of the U-bend have substantially uniform and like internal cross sections.










Sub-classes under this class:

Class Number Class Name Patents
137/247.51 Access opening 29


Patents under this class:

Patent Number Title Of Patent Date Issued
7216670 Drain apparatus with liquid trap and liquid level indicator May. 15, 2007
6779553 Emergency backflow system Aug. 24, 2004
6568415 Storing device for easily polymerizable and coagulating liquid substance and method for pressure control thereof May. 27, 2003
6393839 Pressurized medium delivery device May. 28, 2002
6385799 Plumbing sink trap May. 14, 2002
6279601 Liquid zone seal Aug. 28, 2001
6012480 Cover assembly for covering undersink piping utilizing sliding cover pieces Jan. 11, 2000
5960820 Cover assembly having rapid installation features for covering undersink piping Oct. 5, 1999
5941273 Drain trap apparatus Aug. 24, 1999
5915413 Cover assembly with integral measurement indicia for covering undersink piping Jun. 29, 1999
5915412 Cover assembly for covering undersink piping Jun. 29, 1999
5913325 Cover assembly for covering undersink piping utilizing wrappable collars Jun. 22, 1999
5904175 Cover assembly and method for covering undersink piping May. 18, 1999
5901739 Cover assembly with integral securing apparatus for covering undersink piping May. 11, 1999
5701929 Cover assembly having rapid installation features for covering undersink piping Dec. 30, 1997
5699828 Cover assembly with integral measurement indicia for covering undersink piping Dec. 23, 1997
5649566 Cover assembly and method for covering undersink piping Jul. 22, 1997
5564463 Cover assembly for covering undersink piping Oct. 15, 1996
5341830 Cover assembly and method for covering undersink piping Aug. 30, 1994
5192156 Drain apparatus with liquid trap Mar. 9, 1993
5063616 Flexible drainage trap Nov. 12, 1991
4922554 Retainer for flexible drain pipes May. 8, 1990
4612957 Vacuum pump and trap combination Sep. 23, 1986
4352368 Plumbing apparatus Oct. 5, 1982
4173800 Low-profile syphon trap Nov. 13, 1979
3994031 Flanged trap incorporating access fitting Nov. 30, 1976











 
 
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