Conveyors: fluid current – Conduit – With fluid valve or load spacer
Patent
1989-04-21
1991-02-19
Peters, Jr., Joseph F.
Conveyors: fluid current
Conduit
With fluid valve or load spacer
406 14, 137521, 981212, B65G 5334
Patent
active
049938860
ABSTRACT:
The new invention concerns the regulation of air volume in a conveying system comprising an air collecting line (37) in which the air volume and the corresponding air velocity, respectively, is regulated in the individual conveying pipelines (30-36) by a lifting body (4) resembling an airfoil. The latter works like a throttle flap and moves from an incidence angle (.alpha., .beta.) of at least 10 degrees in the completely open position to 90 degrees in the closed position as a result of the lifting moments acting on it. The lifting body (4) itself regulates the air volume by means of blocking the air line cross section to a greater or lesser extent, wherein a balance is adjusted in every case between the air forces and lifting moments, respectively, which act at the lifting body (4) so as to be directed in a closing position and a counterweight (5) or countertorque, respectively, acting at the lifting body (4) in the opening direction. A responsiveness which has not been previously achieved can accordingly be achieved from every position and an optimal regulating characteristic, e.g. at an approximately constant air velocity, can accordingly be achieved independently of the air resistance occurring prior to the regulating unit.
REFERENCES:
patent: 949009 (1910-02-01), Smith
patent: 1162239 (1915-11-01), Johnsgaard
patent: 2263980 (1941-11-01), Carlson
patent: 2279425 (1942-04-01), Voysey
patent: 3771559 (1973-11-01), Alley
patent: 4301833 (1981-11-01), Donald, III
patent: 4488575 (1984-12-01), Haaz et al.
Buehler AG
Kannofsky James M.
Peters Jr. Joseph F.
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