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Class Information
Number: 417/135
Name: Pumps > One fluid pumped by contact or entrainment with another > Liquid pumped by supplying or exhausting gaseous motive fluid to or from pumping chamber > With float actuated control means > Control of motive fluid outlet > With control of pumped fluid outlet
Description: Apparatus wherein said buoyant means further controls the flow of fluid which is pumped from the pumping chamber.

Patents under this class:

Patent Number Title Of Patent Date Issued
8594851 Wastewater collection flow management system and techniques Nov. 26, 2013
6244828 Pump and combination pump and trap with snap-over mechanism and double-seal outlet valve Jun. 12, 2001
5938409 Gas powered fluid pump with exhaust assist valve Aug. 17, 1999
5401142 Condensate discharging device Mar. 28, 1995
5366349 Automatic liquid pump with vapor flow prevention flow outlet valve Nov. 22, 1994
4842487 Pumping device using pressurized gas Jun. 27, 1989
4828461 Apparatus for metering flowable materials in sand core making machines May. 9, 1989
4770610 Frail material slurry pump Sep. 13, 1988

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