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A corral apparatus has mounting brackets for securing at spaced locations on a wall of a vehicle, livestock trailer, or building, a pair of side panels each having a first end pivotally connected to a respective bracket, and an end panel pivotally secured between the second ends of the side panels,

A corral apparatus has mounting brackets for securing at spaced locations on a wall of a vehicle, livestock trailer, or building, a pair of side panels each having a first end pivotally connected to a respective bracket, and an end panel pivotally secured between the second ends of the side panels, whereby the apparatus can be pivoted between an operative condition in which each side panel extends transverse to the surface and the end panel extends between the ends of the side panels, and a storage position in which the panels are folded flat against one another and the surface.

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1. A corral apparatus for attachment to a wall of a vehicle, trailer, or building, comprising:first and second mounting assemblies for securing at predetermined spaced locations on a wall; a first side panel having a first end pivotally secured to the first mounting assembly to form a first pivot jo

1. A corral apparatus for attachment to a wall of a vehicle, trailer, or building, comprising:first and second mounting assemblies for securing at predetermined spaced locations on a wall; a first side panel having a first end pivotally secured to the first mounting assembly to form a first pivot joint, and a second end; a second side panel having a first end pivotally secured to the second mounting assembly to form a second pivot joint, and a second end; an end panel extending between the second ends of the side panels in a deployed position of the apparatus, whereby an enclosure is formed by the wall, side panels and end panel; and the end panel having a first end pivotally secured to the second end of one of the side panels to form a third pivot joint, and a second end, and being movable between a deployed position extending transversely between the side panels and a collapsed position folded flat against the first side panel, and the side panels being movable between a deployed position extending outwardly in a direction perpendicular to the wall and a collapsed position folded flat against the wall together with the end panel; whereby there are only three panels and three pivot joints in the apparatus. 2. The apparatus as claimed in claim 1, wherein each mounting assembly comprises first and second vertically spaced mounting brackets, and the first end of each side panel has two spaced pivot extensions which are pivotally connected to the respective first and second mounting brackets to form said pivot joints.3. The apparatus as claimed in claim 1, wherein each mounting assembly comprises a single mounting bracket.4. The apparatus as claimed in claim 1, wherein each side panel has a first portion having a first end corresponding to the first end of the panel and a second end, and a second, telescoping end portion telescopically engaged in the second end of the first portion and extending up to the second end of the panel, whereby the length of each side panel may be adjusted by varying the extension of the telescoping end portion from the first portion of the side panel.5. The apparatus as claimed in claim 1, wherein each panel has an adjustable lower portion which is movable between a lowered, ground engaging position when the apparatus is in a deployed condition, and a raised, retracted position when the apparatus is in the collapsed and folded position.6. The apparatus as claimed in claim 1, wherein one of the panels comprises a gate for entry into and exit from the corral when in the deployed condition.7. The apparatus as claimed in claim 6, wherein the end panel comprises the gate.8. The apparatus as claimed in claim 6, wherein the gate comprises at least part of one of the side panels.9. The apparatus as claimed in claim 1, wherein each panel is fixed in length.10. The apparatus as claimed in claim 1, wherein each side panel has a telescoping end portion for adjusting the size of a corral formed by the panels in the deployed condition.11. The apparatus as claimed in claim 10, wherein the telescoping end portion of the second side panel comprises a gate for animals to enter and exit the corral.12. The apparatus as claimed in claim 1, wherein each panel comprises a frame having at least two parallel, horizontal cross bars and spaced vertical posts.13. The apparatus as claimed in claim 12, wherein each frame is made of tubular aluminum material.14. The apparatus as claimed in claim 12, wherein each frame has three parallel, fixed horizontal rails comprising an upper rail, a middle rail, and a lower rail.15. The apparatus as claimed in claim 1, wherein each panel has only two spaced, parallel horizontal rails extending along its length.16. The apparatus as claimed in claim 15, wherein each rail of the side panels has telescoping end portions for adjusting the length of the respective side panel between a fully extended position in which the side panel has a maximum length and a fully retracted position in which the side panel has a minimum length.17. The apparatus as claimed in claim 16, wherein the rails are hollow tubular members, the rails of each side panel frame each having first and second telescoping parts, the first part being of larger cross-sectional dimensions and the second parts of the rails comprising said telescoping end portions.18. The apparatus as claimed in claim 1, including a latch mechanism for releasably securing the second end of the end panel to the second end of the second side panel in the deployed condition.19. The apparatus as claimed in claim 1, wherein the panels in the deployed condition form a corral having a first pair of corners at the first ends of the side panels and a second pair of corners at a junction between each side panel and the end panel, the second pair of corners each comprising a corner post having a downwardly depending support leg movable between a retracted position raised above the ground and a lowered, deployed position contacting the ground to support the panels in the deployed condition.20. The apparatus as claimed in claim 1, wherein said first and second side panels and end panel together form a first corral, and an add-on corral section is provided for mounting on said wall adjacent said first corral, the add-on section comprising a third mounting assembly for securing at a predetermined location on said wall spaced from said second mounting assembly, a third side panel having a first end pivotally secured to said third mounting assembly and a second end, and a second end panel extending between the second ends of the second and third side panels to form a second corral side-by-side with the first corral.21. The apparatus as claimed in claim 20, wherein the second end panel has a first end pivotally secured to the second end of the third side panel and a second end, and being movable between a collapsed position folded flat against the third side panel and a deployed position extending transversely between the third and second side panels, the second end of the second end panel being located adjacent an end of the first end panel in the deployed position.22. The apparatus as claimed in claim 21, the first end panel is pivotally secured to the second end of the first side panel and releasably securable to the second end of the second side panel, and the second end of the second side panel is releasably securable to the second end of the first end panel, whereby the second side panel may be deployed and releasably secured to the second end of the first end panel to form a dividing wall between said corrals, and may be released from the first end panel and folded flat against the wall such that the first side panel, two end panels, and third side panel form a single, larger corral.23. The apparatus as claimed in claim 1, including a releasable locking device for locking the panels to at least one mounting assembly in the folded position.24. A corral apparatus for attachment to a vehicle, trailer, or building, comprising:at least two mounting assemblies for securing at predetermined, horizontally spaced locations on a surface of a vehicle, trailer, or building; a first side panel having a first end pivotally secured to one of the mounting assemblies and a second end; a second side panel having a first end pivotally secured to the other mounting assemblies and a second end; each of the side panels being adjustable in length; and an end panel extending between the second ends of the side panels, whereby an enclosure is formed by the surface, side panels, and end panel; each panel having at least two spaced, horizontal rails; the end panel being pivotally secured to at least one of the side panel second ends, and being movable between a deployed position extending transversely between the side panels and a collapsed position folded inwardly against at least one of the side panels, and the side panels being movable between a deployed position extending outwardly from the surface and a collapsed position folded flat against one another and the surface; and at least one third mounting assembly for securing at a predetermined location on said surface at a horizontal spacing from said first two mounting assemblies, a third side panel having a first end pivotally secured to said third mounting assembly and a second end, and a second end panel having a first end pivotally secured to the second end of the third side panel and a second end, the third side panel and second end panel being movable between a collapsed position folded inwardly against the surface and a deployed position in which said third side panel extends outwardly transverse to the surface and parallel to said first and second side panels and said second end panel extends transverse to said third side panel up to the first mentioned end panel, whereby two side-by-side corrals are formed. 25. The apparatus as claimed in claim 24, wherein each panel has only two rails.26. The apparatus as claimed in claim 25, wherein each rail of the side panels has a telescoping end portion for providing said panel length adjustment.27. The apparatus as claimed in claim 24, wherein each panel has three spaced horizontal rails which are each fixed in height.28. The apparatus as claimed in claim 24, wherein the end panel is formed in one piece.29. The apparatus as claimed in claim 24, wherein each mounting assembly comprises a pair of spaced mounting brackets, and the first end of each side panel is pivotally connected to the respective mounting brackets at two vertically spaced locations.