Vacuum seal

Details Vacuum seal Vacuum seal

1992-01-21

1994-03-08

Look, Edward K.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

4151711, 277 57, 34 15, F01D 1100

Patent

active

052922260

ABSTRACT:
In FIG. 5, a rotor (22.sup.1) has a sealing face (24.sup.1) provided with a plurality of grooves (33.sup.1) in which a sealing fluid can be held by counter-balanced centrifugal and pressure differential forces as the rotor (22.sup.1) rotates to form a seal across the sealing face (24.sup.1). In alternative embodiments the grooves (33) can be of constant width and/or not radially disposed. In a specific use, the sealing arrangement seals a vacuum in a milk concentrator.

REFERENCES:
patent: 971183 (1910-09-01), Faget
patent: 2536292 (1951-01-01), Kollsman
patent: 2570212 (1951-10-01), Cross
patent: 2573425 (1951-10-01), Fletcher
patent: 2709629 (1955-05-01), Ledinegg
patent: 3127181 (1964-03-01), Crego
patent: 3131641 (1964-05-01), Cygnor
patent: 3411992 (1968-11-01), Mitchell
patent: 4645414 (1987-02-01), De Hart et al.
patent: 4830182 (1989-05-01), Nakazato
patent: 4902197 (1990-02-01), Rhodes et al.
patent: 4972986 (1990-11-01), Lipschitz

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