Class 417/123 - Motive fluid in one chamber controlled by condition in second chamber

Subclass of Class 417 - Pumps
Definition: Apparatus wherein said interrelated means is responsive
No. of patents: 2
Last issue date: 08/26/1997

Number	Title	Issue Date
5660530	Pump system for biasing seals of a centrifugal pump Pumping under the present invention includes movement of material, in a first embodiment fluid and in a second embodiment a piston assembly, between first and second positions including detection of said material at each position. Control circuitry and su...	08/26/1997
4323452	Pumpless flow system for a corrosive liquid A system for transporting a highly corrosive liquid solely by pressure differential without the need of mechanical pumps for transporting the corrosive liquid. The system includes a source of gas under pressure (78,82) and first and second corrosive liqui...	04/06/1982

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