Conveyors: fluid current – With means to control conveying fluid or movement of load in... – Responsive to obstacle in system
Patent
1989-12-27
1991-12-10
Pedder, Dennis H.
Conveyors: fluid current
With means to control conveying fluid or movement of load in...
Responsive to obstacle in system
406 14, 406136, 406128, 406192, 406 30, B65G 5366
Patent
active
050712896
ABSTRACT:
A system for delivering a particulate material has a closed storage hopper for the material, the hopper having a bottom hopper outlet and a check valve connected to a top portion of the chamber for venting positive pressure from the chamber; a venturi eductor having a material inlet for feeding the material, an eductor outlet, and a gas inlet; a gas feed valve, the gas feed valve being openable in response to a feed signal for activating the eductor; a hopper passage connecting the hopper outlet to the eductor material inlet; a hopper outlet valve for closing the hopper outlet in response to a hopper signal; a stir valve for pressurizing the hopper passage in response to a stir signal for agitating the material in the hopper; and a pressure sensor for momentarily activating the stir signal in response to an absence of the material at the material inlet, the system being operative in a transporting mode wherein the hopper valve is open, the feed valve is open, and the stir valve is closed; a stirring mode wherein the hopper valve and stir valves are open; a purging mode wherein the hopper and feed valves are closed and the stir valve is activated; and an override mode wherein the hopper and stir valves are open and the feed valve is closed. The system automatically responds to a predetermined number of activations of the stir signal within a fixed period of time, by entering the purging mode.
REFERENCES:
patent: 2536402 (1951-01-01), Voorhees
patent: 2771323 (1956-11-01), Taylor
patent: 2919159 (1959-12-01), LaCroix
patent: 3099497 (1963-07-01), Albert
patent: 3149884 (1964-09-01), Jones
patent: 3195775 (1965-07-01), Thomas et al.
patent: 3258296 (1966-06-01), Von Funk
patent: 3363806 (1968-01-01), Blakeslee et al.
patent: 3454307 (1969-07-01), Bishop
patent: 3858943 (1975-01-01), Bose et al.
patent: 3905650 (1975-09-01), Freeman
patent: 4029365 (1977-06-01), Ahrens et al.
patent: 4059311 (1977-11-01), Spitzer et al.
patent: 4116367 (1978-09-01), Kataoka et al.
patent: 4118074 (1978-10-01), Solt
patent: 4383766 (1983-05-01), Eriksson
patent: 4412762 (1983-11-01), Lepley et al.
patent: 4420957 (1983-12-01), Weber
patent: 4799831 (1989-01-01), Ariaz
patent: 4830545 (1989-05-01), Salter et al.
Bulk Solids Handling, by C. R. Woodcock and J. S. Mason, Title Page, pp. 113-115, 125-135, 188-193, 426-427, no date.
Pneumatic Conveying of Bulk Materials, by Milton N. Kraus, pp. 14-25, no date.
"Trost Air Impact Mills/Pulverizers" article, Martin Engineering Company, Mar., 1989.
Alpheus Cleaning Technologies Corp.
Kannofsky James M.
Pedder Dennis H.
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