Rotary expansible chamber devices – With mechanical sealing – Seal element between working member and vane
Patent
1994-09-29
1996-02-06
Freay, Charles
Rotary expansible chamber devices
With mechanical sealing
Seal element between working member and vane
418241, F04C 200
Patent
active
054891990
ABSTRACT:
A pinned vane type, positive displacement, rotary device includes a tangentially translatable roller arrangement for sealing each of a plurality of rotatable blades that are pivotally attached to an inner hub and extend through blade spreader elements of an outer hub assembly to contact the interior surface of the device. Each of roller elements on either side of a respective blade is allowed to rotate about its own axis, while the unloaded one of the roller elements is allowed to translate tangentially relative to a circular path described by the outer hub assembly. The sealing arrangement accommodates pivoting of the blade about an axis that passes through the blade in the radial direction from the inner hub to the interior surface of the housing, so that the contact surface between each roller element and its associated blade has no gaps across the surface of the blade between outer hub assemblies. The sealing arrangement also includes sealing elements biased against the rollers preventing gas leakage during translation motion of the unloaded roller element.
REFERENCES:
patent: T930007 (1975-01-01), Takahashi et al.
patent: 3747573 (1973-07-01), Foster
patent: 4168941 (1979-09-01), Rettew
patent: 4451218 (1984-05-01), Rembold
Freay Charles
Spread Spectrum Inc.
Wands Charles E.
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