Conveyors: fluid current – Intake to fluid current conveyor – Conveyor having plural intakes
Patent
1990-02-01
1991-04-02
Peters, Jr., Joseph F.
Conveyors: fluid current
Intake to fluid current conveyor
Conveyor having plural intakes
406127, 193 33, B65G 5346
Patent
active
050043773
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to isolated insertion chutes which at spaced intervals are connected to an underground suction conveying conduit communicating with a refuse suction system, with the upper end above ground of every chute being provided with an insertion opening that may be closed and with the lower end below ground of every chute being connected to the suction conveying conduit.
DESCRIPTION OF THE PRIOR ART
The present invention starts from the insertion chute of the above indicated kind which for instance is disclosed and illustrated in Swedish patent specification No. 7302382-2 (publication No. 381 021). This previously known insertion chute is connected--possibly through a valve means provided at the lower end of the insertion chute--to the underground collecting conduit, said connection to the collecting conduit and said valve, if present, being provided below the ground surface immediately adjacent the collecting conduit. In order to permit access to the collecting conduit in case it is clogged or obstructed close to the connecting point of the insertion chute or to permit maintenance, repair and possibly exchange of the valve means or parts thereof, the lower portion of the insertion chute is enclosed in a chamber provided below the ground surface and being accessible from the ground surface for instance through a hatch. This solution causes substantial costs both for the additional digging or dredging required at the locations where insertion chutes are to be positioned, in order to also provide sufficient space for a chamber having such dimension that personnel without difficulty may get down into the chamber to perform necessary work, and for the work performed in connection with casting the chamber in itself. Naturally the maintenance or repair work is also inconvenient and troublesome, and this is true even if the chamber is properly dimensioned, and particular problems arise especially if parts cannot be repaired on location but must be removed for repair or must be exchanged.
SUMMARY OF THE INVENTION
Thus, the principal object of the present invention is to provide an insertion chute of the above indicated kind, by means of which the above described disadvantages in connection with the prior art insertion chute may be eliminated, while the reliable operation of the insertion chute must also be maintained.
This object is attained by means of an apparatus of the kind indicated in the characterizing portion of the enclosed claim 1.
Preferred improvements and suitable embodiments of the invention are indicated in the dependent subclaims.
BRIEF DESCRIPTION OF THE DRAWINGS
With the purpose of exemplifying the invention an embodiment thereof is disclosed more closely below in connection with the enclosed drawings, in which:
FIG. 1 illustrates a prior art insertion chute,
FIG. 2 illustrates, partly in section, the insertion chute according to the present invention, with a valve means in its closed condition,
FIG. 3 illustrates the insertion chute according to the present invention, in a view corresponding to that of FIG. 2, but with the valve means in its open condition,
FIG. 4 illustrates, in a section along line A--A in FIG. 2, the upper portion of the chute with the valve operating means removed,
FIG. 5 is a top view of the lower portion of the chute, without valve operating means and seal unit,
FIG. 6 is a top view of the branching of the T-piece,
FIG. 7 is an endview of the lower operating rod,
FIG. 8a is a top elevation of the seal unit for the operating rod,
FIG. 8b is a section along line B--B in FIG. 8a of the seal unit, and
FIG. 9 illustrates an alternative embodiment of the insertion chute, in a view corresponding to that of FIG. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 schematically illustrates an example of the previously known technique from which the present invention starts and which is disclosed in Swedish patent specification No. 7302382-2. This known system comprises a column 1 positioned above the ground surface and having a s
REFERENCES:
patent: 1886793 (1972-11-01), Davidson
patent: 3316026 (1967-04-01), Hallstrom
patent: 3687503 (1972-08-01), Ekstrom et al.
patent: 3977729 (1976-08-01), Olson et al.
patent: 4640403 (1987-02-01), McDermott
Mattix Carla
Peters Jr. Joseph F.
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