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Class Information
Number: 137/247
Name: Fluid handling > With liquid valves or liquid trap seals
Description: Apparatus in which a liquid, maintained at the desired location by some form of reservoir, is used as a seal or closure between adjacent parts of a system containing either a gas or a liquid which is lighter than the sealing liquid.

Sub-classes under this class:

Class Number Class Name Patents
137/247.11 Liquid seal in liquid flow line; flow liquid forms seal 18
137/251.1 Liquid valves 83
137/248 Seal for relatively movable valving parts 10

Patents under this class:

Patent Number Title Of Patent Date Issued
8654532 Server cabinet coolant distribution system Feb. 18, 2014
8591729 Storm drain with water trap Nov. 26, 2013
7195229 Automatic sampler Mar. 27, 2007
7063302 Sample valve with integral sample shut off function for chromatograph Jun. 20, 2006
6858150 Water processing device with liquid seal Feb. 22, 2005
6823785 Printing unit Nov. 30, 2004
6655657 Coking-resistant bearing Dec. 2, 2003
6638481 Plug flow cytometry for high throughput screening and drug discovery Oct. 28, 2003
6632404 Automatically actuated parallel sample injector valve Oct. 14, 2003
6093314 Drain insert for storm water sewer systems, and method of manufacture Jul. 25, 2000
5047997 Sonar projector with liquid mass loading for operation at lower frequency Sep. 10, 1991
4706701 Odor trap assembly Nov. 17, 1987
4546785 Pressure translator and system for measuring pressure Oct. 15, 1985
4244061 Urinals Jan. 13, 1981

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