1. An improved ventilation system for a hog confinement building having a slatted floor, a manure reservoir beneath the floor, and a pump out pit in communication with the reservoir via an opening therebetween, the improvement comprising:
a fan on top of the pit;
an air conduit extending downwardly from the fan;
a gate slidably mounted on the conduit for upward and downward movement along the conduit;
the gate having a lower end with an air passage through which air from the pit is pulled into the conduit for expulsion by the fan; and
the lower end of the gate including a float so that the gate floats on top of manure in the pit such that the air passage rises and falls as the depth of manure in the pit changes.
2. The improved ventilation system of claim 1 wherein the air conduit and gate are retrofit into the pit.
3. The improved ventilation system of claim 1 wherein the gate has multiple detachable sections.
4. The improved ventilation system of claim 1 wherein the gate has an upper section and a lower section, with the air passage being in the lower section.
5. The improved ventilation system of claim 1 further comprising a cover on the pit with a slot in the cover through which the gate moves up and down.
6. The improved ventilation system of claim 1 wherein the conduit has spaced apart tracks in which the gate is mounted.
7. The improved ventilation system of claim 1 wherein the pit has a bottom, and the conduit has a lower end adjacent the bottom of the pit.
8. An improved ventilation system for a hog confinement building having a slatted floor, a manure reservoir beneath the floor, and a pump out pit in communication with the reservoir via an opening therebetween, the improvement comprising:
a fan on top of the pit;
a panel slidable mounted in the pit so as to block air flow from the reservoir to the fan;
the panel having a lower end with an air passage through which air flows from the reservoir into the pit for expulsion by the fan.
9. The improved ventilation system of claim 8 wherein the panel is adjacent the opening.
10. The improved ventilation system of claim 9 further comprising a pair of tracks on opposite sides of the opening, and the panel being slidably mounted in the tracks.
11. The improved ventilation system of claim 8 further comprising a conduit extending downwardly from the fan in the pit, and the panel being slidably mounted on the conduit.
12. The improved ventilation system of claim 8 further comprising a float on the panel to engage an upper surface of manure in the pit, such that the panel floats on the manure surface.
13. The improved ventilation system of claim 8 wherein the gate has multiple detachable sections.
14. The improved ventilation system of claim 8 wherein the gate has an upper section and a lower section, with the air passage being in the lower section.
15. The improved ventilation system of claim 8 further comprising a cover on the pit with a slot in the cover through which the gate moves up and down.
16. A hog confinement building, comprising:
a roof;
a slatted floor;
a manure reservoir beneath the floor for receiving manure through the slatted floor;
a conduit having a lower end with an air passage residing at an elevation lower than the floor and an upper end;
a fan connected to the upper end of the conduit to pull air from a level adjacent the manure in the pit, through the air passage and upwardly through the conduit for expulsion from the conduit.
17. The hog confinement building of claim 16 wherein the conduit includes a sliding panel which floats on top of the manure, and the air passage being formed in the panel.
18. The hog confinement building of claim 17 wherein the conduit extends into the reservoir.
19. The hog confinement building of claim 18 wherein the fan is on top of the roof.
20. The hog confinement building of claim 16 wherein the conduit is in a pump out pit.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A cargo container comprising:
an enclosure for transporting cargo, the enclosure comprising an opening to provide access to the enclosure;
a first plug door comprising:
a first insulating layer;
a first skin on a face of the first insulating layer; and
a first projection; and
a second plug door comprising:
a second insulating layer;
a second skin on a face of the second insulating layer;
a second projection designed to overlap with the first projection; and
a sealing member disposed on the second projection;
wherein when the first plug door and the second plug door are in a closed configuration, the only contact between the first plug door and the second plug door in the area of the first and second projections is between the first skin and the second skin or the sealing member.
2. The cargo container of claim 1, wherein the first and second skins comprise fiber-reinforced plastics.
3. The cargo container of claim 1, wherein the first and second insulating layers comprise urethane foam.
4. The cargo container of claim 1, wherein the the first and second insulating layers comprise a vacuum insulated panel.
5. A cargo container comprising:
an enclosure for transporting cargo, the enclosure comprising an opening to provide access to the enclosure;
a first plug door comprising:
a first insulating layer;
a first outer skin on an outer surface of the first insulating layer; and
a first inner skin on an inner surface of the first insulating layer, wherein the inner skin includes a projection; and
a second plug door comprising:
a second insulating layer;
a second outer skin on an outer surface of the second insulating layer; and
a second inner skin on an inner surface of the second insulating layer;
wherein the second insulating layer, second outer skin, and second inner skin include a second projection designed to overlap with the first projection; and
a sealing member disposed on the second projection;
wherein when the first plug door and the second plug door are in a closed configuration, the only contact between the first plug door and the second plug door in the area of the first and second projections is between the first inner skin and the second inner skin of the second plug door or the sealing member.
6. The cargo container of claim 5, wherein the first and second inner skins comprise fiber-reinforced plastics.
7. The cargo container of claim 5, wherein the first and second insulating layers comprise urethane foam.
8. The cargo container of claim 5, wherein the the first and second insulating layers comprise a vacuum insulated panel.
9. A cargo container comprising:
an enclosure for transporting cargo, the enclosure comprising an opening to provide access to the enclosure, the opening having a doorjamb on its perimiter, wherein the doorjamb includes:
a first insulating layer;
a first skin on a face of the first insulating layer; and
a first projection; and
a plug door comprising:
a second insulating layer;
a second skin on a face of the second insulating layer;
a second projection designed to overlap with the first projection; and
a sealing member disposed on the second projection;
wherein when the plug door is in a closed configuration, the only contact between the plug door and the door jamb in the area of the first and second projections is between the first skin and the second skin or the sealing member.
10. The cargo container of claim 9, wherein the first and second skins comprise fiber-reinforced plastics.
11. The cargo container of claim 9, wherein the first and second insulating layers comprise urethane foam.
12. The cargo container of claim 9, wherein the the first and second insulating layers comprise a vacuum insulated panel.
13. A cargo container comprising:
an enclosure for transporting cargo, the enclosure comprising an opening to provide access to the enclosure, the opening having a doorjamb on its perimiter, wherein the doorjamb includes:
a first insulating layer;
a first outer skin on an outer surface of the first insulating layer; and
a first inner skin on an inner surface of the first insulating layer, wherein the inner skin includes a projection; and
a plug door comprising:
a second insulating layer;
a second outer skin on an outer surface of the second insulating layer; and
a second inner skin on an inner surface of the second insulating layer;
wherein the second insulating layer, second outer skin, and second inner skin include a second projection designed to overlap with the first projection; and
a sealing member disposed on the second projection;
wherein when the plug door is in the closed configuration, the only contact between the plug door and the door jamb in the area of the first and second projections is between the first inner skin and the second inner skin of the second plug door or the sealing member.
14. The cargo container of claim 13, wherein the first and second inner skins comprise fiber-reinforced plastics.
15. The cargo container of claim 13, wherein the first and second insulating layers comprise urethane foam.
16. The cargo container of claim 13, wherein the the first and second insulating layers comprise a vacuum insulated panel.
17. A double plug door for a cargo container comprising:
a first plug door comprising:
a first insulating layer;
a first skin on a face of the first insulating layer; and
a first projection; and
a second plug door comprising:
a second insulating layer;
a second skin on a face of the second insulating layer;
a second projection designed to overlap with the first projection; and
a sealing member disposed on the second projection;
wherein when the first and second projections overlap, the only contact between the first plug door and the second plug door in the area of the first and second projections is between the first skin and the second skin or the sealing member.
18. The cargo container of claim 17, wherein the first and second skins comprise fiber-reinforced plastics.
19. The cargo container of claim 17, wherein the first and second insulating layers comprise urethane foam.
20. The cargo container of claim 17, wherein the the first and second insulating layers comprise a vacuum insulated panel.