Combined vacuum pump, bearing and seal assembly

Details Combined vacuum pump, bearing and seal assembly Combined vacuum pump, bearing and seal assembly

1985-06-07

1987-02-24

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Runner with annular blade rows or fluid channels spaced on...

415106, 415170R, 277 961, F04D 2508

Patent

active

046454144

ABSTRACT:
A combination vacuum pump, low friction bearing and seal assembly is provided in which a rotor relatively rotatable with respect to a stator has two sets of radially spaced, concentric spiral grooves. As the rotor rotates, one set of grooves forces sufficient ambient air between confronting surfaces of the rotor and stator to keep them axially spaced and provide a low friction bearing. Another set of grooves forces sufficient air from the vessel and through a one-way air exit to evacuate the vessel. A restriction created by the axially spaced confronting surfaces substantially prevents ambient air from moving radially inwardly to the evacuated vessel, as well as trapping the ambient air to maintain the axial spacing. Any ambient air passing through the restriction is dumped back to ambient through the same air exit, thereby keeping the evacuated vessel sealed.

REFERENCES:
patent: 3109658 (1963-11-01), Barrett et al.
patent: 3804424 (1974-04-01), Gardner
patent: 3894741 (1975-07-01), McHugh
patent: 4486026 (1984-12-01), Furumura et al.
patent: 4523764 (1985-06-01), Albers et al.
patent: 4543037 (1985-09-01), Etsion

Affiliated with

Also associated with

Rating

Combined vacuum pump, bearing and seal assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Combined vacuum pump, bearing and seal assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combined vacuum pump, bearing and seal assembly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-106708