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Class Information
Number: 137/136
Name: Fluid handling > Siphons > Periodic or accumulation responsive discharge > Release of trapped air
Description: Apparatus in which the liquid accumulating in the siphon chamber traps air in the siphon element and means is provided to release such trapped air to initiate liquid flow through the siphon.

Sub-classes under this class:

Class Number Class Name Patents
137/137 Through float-operated vent 7
137/138 Through liquid trap seal 10

Patents under this class:

Patent Number Title Of Patent Date Issued
5921267 Water level control device Jul. 13, 1999
5113837 Air induction control device May. 19, 1992
5009261 Device for providing communication between water tanks of heat accumulation tank system Apr. 23, 1991
4887667 Device for providing communication between water tanks of heat accumulation tank system Dec. 19, 1989
4802897 Recovery of gases from non-viscous solvents Feb. 7, 1989
4619273 Device for diagnosing and monitoring urological diseases Oct. 28, 1986
4542762 Automatic liquid delivery apparatus Sep. 24, 1985
4526757 Pulsed flow vapor-liquid reactor Jul. 2, 1985

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