Dispensing – With discharge assistant – Movable or conveyer-type trap chamber
Patent
1973-06-20
1976-07-20
Reeves, Robert B.
Dispensing
With discharge assistant
Movable or conveyer-type trap chamber
61 84, 222368, G01F 1124
Patent
active
039702243
ABSTRACT:
For use with a tunnelling shield in which an excavating tool operates within a substantially sealed-off and pressurized region, a spoil-removal device for extracting spoil from the pressurized region comprises a cylindrical chamber which has an inlet port open to the pressurized region and a discharge port which is open to a position outside said region and a multi-compartment rotary member adapted to rotate in said chamber in sealed co-operation therewith, each compartment of the rotary member being arranged to pass said inlet port and said discharge port in turn and being arranged not to be open to both ports at the same time, each compartment being arranged to receive a charge of solid spoil when the compartment reaches the inlet port, the amount of the charge being governed by the angle of slide of the spoil, and to deliver the charge to said position outside the excavating region when the compartment reaches the discharge port, substantially each part of the compartment surface which supports the charge when in the vicinity of the discharge port being arranged to attain an angle to the horizontal which is generally in excess of said sliding angle of the spoil, whereby the compartment tends to empty itself while the compartment is open to the discharge port. The axis of rotation of the rotary member may be at right angles or parallel to the direction of the longitudinal axis of the tunnel being excavated. The device may include a receiver for receiving and supporting solid spoil in front of said inlet port.
REFERENCES:
patent: 989348 (1911-04-01), Haines
patent: 1173158 (1916-02-01), Arden
patent: 2669441 (1954-02-01), Castanoli et al.
patent: 2886216 (1959-05-01), Oholm
patent: 2955808 (1960-10-01), Kandle
patent: 3131821 (1964-05-01), Tsujihata et al.
Chatham Cyril Gordon
Long Kenneth
Bartuska Francis J.
National Research Development Corporation
Reeves Robert B.
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