Hydraulic pump for low-viscosity pumping media

Details Hydraulic pump for low-viscosity pumping media Hydraulic pump for low-viscosity pumping media

1984-04-09

1985-10-29

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

418152, 418178, F04C 218, F04C 1500

Patent

active

045498628

ABSTRACT:
The pump has a casing, bearing members having portions for radial and axial mounting situated in the casing, at least one displacement element having journals rotatably received in the bearing members, a drive shaft extending from outside into the casing and sealed with respect to the casing by a sealing ring and drivably connected to one of the journals. At least the surfaces of each displacement element, of the journals, of the further elements and of the portion of the shaft inside the sealing ring are plasma-nitrided and the portions for axially mounting the journals are coated with a ceramic material. Also the portion of the shaft inside the sealing ring and the journals may be encased by a ceramic material.

REFERENCES:
patent: 3545900 (1970-12-01), Viner et al.
patent: 3704968 (1972-12-01), Haupt
German-language excerpt from, "Lueger Lexikon der Technik", entitled Fertigungstechnik und Arbeitsmaschinen.

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