Rotary valve

Dispensing – With discharge assistant – Movable or conveyer-type trap chamber

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Details

414220, G01F 1110

Patent

active

060450096

ABSTRACT:
The present invention relates to a rotary valve for conveying and metering bulk material into a pneumatic conveying conduit. Exemplary embodiments include a housing with a supply opening, a discharge opening and a cellular wheel supported rotatably about a substantially horizontal axis within a cavity of the housing. The cellular wheel rotates in a predetermined direction of rotation so that as some of its cells move upward, other cells move downward. The housing has at least one venting opening for venting the upward moving cells, the venting opening being arranged before the supply opening when seen in the direction of rotation. A perimeter of the at least one venting opening lies on a peripheral wall of the housing and has a plurality of recesses which extend in a direction towards the cellular wheel when the latter rotates in the direction of rotation.

REFERENCES:
patent: 4823993 (1989-04-01), Siegel et al.
patent: 5114053 (1992-05-01), Bierle
patent: 5544995 (1996-08-01), Ogawa et al.
patent: 5906297 (1999-05-01), Cole

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