Material or article handling – Apparatus for moving material between zones having different... – Including trap chamber having horizontal axis of rotation
Patent
1995-08-14
1997-05-20
Merritt, Karen B.
Material or article handling
Apparatus for moving material between zones having different...
Including trap chamber having horizontal axis of rotation
222368, G01F 1124
Patent
active
056306911
ABSTRACT:
A rotary airlock valve is provided with a ring seal. The airlock includes a tapered tubular housing formed about a longitudinal axis. The housing includes inlet and outlet ports to receive and discharge the material. The housing further includes end plates at opposite ends thereof which rotatably support opposite ends of a rotor assembly. The rotor assembly rotates within the housing about the longitudinal axis. The rotor includes multiple vanes with shrouds on opposite ends thereof. Seal rings are mounted upon inner surfaces of the end plates and biased towards outer surfaces of the shrouds to maintain a sealed relation between the shrouds and end plates. An expandable biasing tube is mounted proximate the seal rings to bias each seal ring toward and against the shroud. Each biasing tube is hollow to receive a predetermined amount of pressurized air. Each biasing tube is expandable as the rotor assembly slides axially along the rotational axis to maintain the seal ring in an engaging relation with the corresponding shrouds.
REFERENCES:
patent: 3101853 (1963-08-01), Long et al.
patent: 3151784 (1964-10-01), Tailor
patent: 4179043 (1979-12-01), Fischer
patent: 4180188 (1979-12-01), Aonuma et al.
patent: 4565305 (1986-01-01), Fischer et al.
patent: 5201441 (1993-04-01), Hoppe et al.
Gordon Stephen
Mac Equipment, Inc.
Merritt Karen B.
LandOfFree
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