Tank truck manhole filter

Details Tank truck manhole filter Tank truck manhole filter

1989-10-27

1991-12-10

Pedder, Dennis H.

Conveyors: fluid current

Fluid current conveyor outlet means

With material separating receptacle

406 39, 406 41, 406145, 406175, B65G 5360, B65G 5310, B60P 160

Patent

active

050712900

ABSTRACT:
A filter apparatus for use in filtering dust and the like from a pressurized air stream flowing through a manhole of a hopper trailer in a particulate transfer system includes a filter sheet having a shape substantially corresponding to the shape of the manhole and a plurality of filters mounted thereon. A retainer flange is installed in the manhole for supporting the filter sheet and a filter hold down is provided for holding the filter assembly in the manhole and for pressing the filter sheet into contact with the retainer flange. The filter hold down clamp contacts the filter sheet along the central longitudinal axis of the passage in order to provide one-point hold down of the sheet.

REFERENCES:
patent: 589106 (1897-08-01), Weber
patent: 1707206 (1929-03-01), Bernert
patent: 3147041 (1964-09-01), Howcroft
patent: 4659262 (1987-04-01), van Aalst
patent: 4695205 (1987-09-01), Levine
patent: 4718796 (1988-01-01), Shiers et al.
patent: 4844665 (1989-07-01), Howell
patent: 4904126 (1990-02-01), Voith
patent: 4917544 (1990-04-01), Crahan et al.

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