Conveyors: fluid current – Conduit – Having changing cross section
Patent
1989-12-18
1991-06-04
Peters, Jr., Joseph F.
Conveyors: fluid current
Conduit
Having changing cross section
406191, 138 44, 138 37, B65G 5118
Patent
active
050209434
ABSTRACT:
A cylindrical pipe of internal diameter d, intended for pneumatic transport of solid polymer particles. The pipe has contrictions located over its length in such a way that the distance l between two consecutive constrictions is between d and 10.times.d. Each constriction consists of a non-uniform restriction of the cross-sectional area S of the pipe. That restriction defines a new internal cross-sectional area S' of between 0.900.times.S and 0.995.times.S and has at least one unrestricted free passage defined by a circular sector of the area S with a vertex situated on the axis of the pipe and an angle at the vertex ranging from 5.degree. to 60.degree..
REFERENCES:
patent: 3380783 (1968-04-01), Hunter
patent: 3524478 (1967-08-01), Rapp et al.
patent: 3721269 (1973-03-01), Choate et al.
patent: 4230426 (1980-10-01), Avery, Jr. et al.
BP Chemicals Limited
Ellis Christopher P.
Peters Jr. Joseph F.
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