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Class Information
Number: 137/454
Name: Fluid handling > Liquid level responsive or maintaining systems > Barometric > With shut-off between supply tank and receiver
Description: Apparatus which includes means for closing the fluid connection between a supply container and a receiving vessel.

Patents under this class:

Patent Number Title Of Patent Date Issued
7143781 Flexible bladder apparatus for fluid flow control Dec. 5, 2006
6994107 Easy-to-install, mechanically-operated automatic/manual device for controlling an outlet for water or any fluid Feb. 7, 2006
6267131 Method of controlling pressure in a chamber, apparatus for the same, and exposure apparatus Jul. 31, 2001
5881753 Passive fluid level controller Mar. 16, 1999
5857484 Liquid supply device and valve structure Jan. 12, 1999
5687783 Animal watering device Nov. 18, 1997
5546153 Liquid transfer system and method Aug. 13, 1996
4921639 Ultrasonic humidifier May. 1, 1990
4754777 Valve for the addition of water to electrochemical accumulator batteries Jul. 5, 1988
4653529 Plant watering device Mar. 31, 1987
4629303 Photographic processing apparatus Dec. 16, 1986
4449477 Liquid dispenser May. 22, 1984
4393894 Fluid supply and dispensing apparatus Jul. 19, 1983
4343326 Apparatus for dispensing a liquid additive Aug. 10, 1982
4340050 Medical fluid flow rate indicating/controlling device Jul. 20, 1982
4199000 Cross-contamination isolator Apr. 22, 1980
4148155 System and apparatus for automatically feeding plants Apr. 10, 1979
4136693 Constant flow I.V. device Jan. 30, 1979
4082163 Oil replenishing cartridge Apr. 4, 1978

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