1. A poultry feeder comprising:
a feeder pan;
a grill assembly mounted on the feeder pan;
an adjusting collar supported by the grill assembly; and
a feeder tower including an upper portion for receiving feed and a lower portion having an open bottom end for dispensing feed into the feeder pan, the feeder tower being vertically moveable relative to the feeder pan from a closed position in which the feeder tower is engaged with the feeder pan, to a open position in which the feeder tower is disengaged from the feeder pan;
wherein the feeder is operable to preclude feed from entering the feeder pan when the feeder tower is in the closed position and operable to dispense feed into the feeder pan when in the feeder tower is in the open position.
2. The feeder of claim 1, wherein the bottom end of the feeder tower engages the feeder pan in the closed position and the bottom end of the feeder tower is spaced apart from the feeder pan by a gap in the open position.
3. The feeder of claim 2, wherein the closed position is a lower position of the feed tower with respect to the feeder pan and the open position is a raised position higher than the lower position of the feeder tower with respect to the feeder pan.
4. The feeder of claim 3, wherein travel stop surface on the feeder tower engages the adjusting collar when in the raised open position.
5. The feeder of claim 4, wherein the travel stop surface is defined by an angled radial wall on a frusto-conical section of the feeder tower.
6. The feeder of claim 1, wherein the adjusting collar is rotatably supported by the grill assembly, the adjusting collar being selectively adjustable in vertical position with respect to the feeder pan and grill assembly by rotating the adjusting collar.
7. The feeder of claim 6, wherein the adjusting collar is operable to vary a gap in size formed between the bottom of the feeder tower and feeder pan when the feeder tower is in the raised open position.
8. The feeder of claim 6, wherein the grill assembly includes a helically threaded hub encircling the feeder tower, the adjusting collar including mating helical threads for rotatably engaging the hub.
9. The feeder of claim 1, further comprising a vertically moveable feed conveyor tube attached to the upper portion of the feeder tower, wherein raising the feed conveyor tube raises the feeder tower from the lowered closed position to the open position.
10. A poultry feeder comprising:
a feeder pan including a bowl portion for holding feed and a central portion extending upwardly from the bowl portion;
a grill assembly mounted on the feeder pan, the grill assembly including a plurality of ribs and a cylindrical hub elevated above the feeder pan;
an adjusting collar concentrically arranged inside the hub, the collar rotatably engaging the hub and being vertically positionable with respect to the hub by rotating the collar; and
a feeder tower including an upper portion configured for coupling to an overhead poultry feeding system and a lower portion having an open bottom end, the feeder tower independently moveable in a vertical direction through the adjusting collar, the feeder tower being moveable relative to the feeder pan from a lowered closed position in which the bottom of the feeder tower engages the feeder pan, to a raised open position in which the bottom end of the feeder tower is spaced above the feeder pan by a distance;
wherein the feeder is operable to hold feed when in the closed position without dispensing feed into the feeder pan, and operable to dispense feed into the feeder pan when in the open position; and
wherein the feeder tower includes a travel stop surface that is engageable with a bottom end of the adjusting collar, wherein adjusting the vertical position of the adjusting collar with respect to the hub changes the distance between the bottom end of the feeder tower and feeder pan when the feeder tower is in the raised open position to control the amount of feed dispensed to the feeder pan.
11. The feeder of claim 10, wherein the feeder tower includes a frusto-conical section having an angled wall that forms the travel stop surface.
12. The feeder of claim 10, further comprising a vertically moveable feed conveyor tube attached to the upper portion of the feeder tower, wherein raising the feed conveyor tube raises the feeder tower from the lowered closed position to the open position through the adjusting collar.
13. The feeder of claim 12, wherein raising the feeder tower from the closed to open position does not raise the feeder pan.
14. A method for operating a poultry feeder comprising:
providing a poultry feeder comprising a feeder pan, a grill assembly, an adjusting collar, and a feeder tower configured for receiving and dispensing feed to the feeder pan;
engaging an open bottom end of the feeder tower with the feeder pan, the feeder tower being in a first lowered closed position;
filling the feeder tower with feed, wherein feed is prevented from flowing into the feeder pan by the engagement between the bottom end of feeder tower and the pan;
raising the feeder tower to a second upper open position; and
disengaging the bottom end of the feeder tower from the feeder pan to form a gap therebetween, wherein feed flows into the feeder pan from the feeder tower.
15. The method of claim 14, further comprising engaging the feeder tower with the adjusting collar during the raising step.
16. The method of claim 15, wherein a bottom end of the adjusting collar engages a travel stop surface on the feeder tower when the feeder tower is in the second upper open position.
17. The method of claim 15, further comprising a step of rotating the adjusting collar to raise or lower the bottom end of the adjusting collar with respect to the feeder pan.
18. The method of claim 14, further comprising a step of locating the feeder pan on a floor of a poultry house before the engaging step.
19. The method of claim 18, further comprising after the disengaging step, a step of lifting the feeder pan off the floor while maintaining the feeder tower in the second open position.
20. The method of claim 14, wherein the feeder tower is suspended from a feed conveyor tube of a poultry feeding system, and wherein the raising step includes raising the feed conveyor tube to simultaneously raise the feeder tower to the second position.
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 stabilized leukotriene B4 (\u201cLTB4\u201d) agent pharmaceutical formulation comprising a therapeutically effective amount of leukotriene B45S,12R-dihydroxy-6,8,10,14(Z,E,E,Z)-eicosatetraenoic acidor a salt thereof, in association with a pharmaceutically acceptable aqueous carrier comprising less than 15% (volvol) acetonitrile at an alkaline pH between 8.2 and 14 effective to stabilize said LTB4 agent, thereby increasing said formulation shelf-life for at least 3 months at 20\xb0 C.
2. The stabilized formulation of claim 1, wherein the formulation comprises only non-toxic substances.
3. The stabilized formulation of claim 1, wherein said alkaline pH ranges between 8.5 and 11.5.
4. The stabilized formulation of claim 1, wherein said alkaline pH ranges between 9.5 and 11.5.
5. The stabilized formulation of claim 1, wherein said aqueous carrier is selected from the group consisting of water, alkaline metal hydroxide solutions, buffered saline solutions, alcohol-containing aqueous solution, and sugar solutions.
6. The stabilized formulation of claim 5, wherein the alcohol of said alcohol-containing aqueous solution is selected from the group consisting of ethanol, propyleneglycol, benzyl alcohol, propanediol, glycerol, and mannitol.
7. The stabilized formulation of claim 1, wherein said carrier is a mixture of an organic solvent and water.
8. The stabilized formulation of claim 7, wherein said mixture comprises water and at least 50% (volvol) alcohol.
9. The stabilized formulation of claim 8, wherein said alcohol is selected from the group consisting of ethanol, propyleneglycol, benzyl alcohol, propanediol, glycerol, and mannitol.
10. The stabilized formulation according to claim 1, wherein said LTB4 agent is leukotriene B45S,12R-dihydroxy-6,8,10,14(Z,E,E,Z)-eicosatetraenoic acid (\u201cLTB4\u201d).
11. The stabilized formulation according to claim 1, wherein said LTB4 agent is present in amounts of from about 0.1 \u03bcgml to 25 mgml of the formulation.
12. The stabilized formulation according to claim 1, wherein said LTB4 agent is present in amounts of from about 1 \u03bcgml to 1 mgml of the formulation.
13. The stabilized formulation according to claim 1, comprising less than 1% (volvol) acetonitrile.