Rotatable seal assembly

Details Rotatable seal assembly Rotatable seal assembly

1980-11-12

1982-11-30

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277226, 308160, B01J 1700, F16J 1540

Patent

active

043613322

ABSTRACT:
An assembly is provided for rotatably supporting a rotor on a stator so that vacuum chambers in the rotor and stator remain in communication while the chambers are sealed from ambient air, which enables the use of a ball bearing or the like to support most of the weight of the rotor. The apparatus includes a seal device mounted on the rotor to rotate therewith, but shiftable in position on the rotor while being sealed to the rotor as by an O-ring. The seal device has a flat face that is biased towards a flat face on the stator, and pressurized air is pumped between the faces to prevent contact between them while spacing them a small distance apart to avoid the inflow of large amounts of air between the faces and into the vacuum chambers.

REFERENCES:
patent: 4118042 (1978-10-01), Booth
patent: 4191385 (1980-03-01), Fox
patent: 4268044 (1981-05-01), Killian et al.
patent: 4287758 (1981-09-01), Swearingen

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