Claims
- 1. In an apparatus comprising extendible structure having a free end and supported at the other end by a base structure which rotatably supports the extendible structure for rotation in a circumferential path to swing the extendible stucture outwardly of the sides of the apparatus, said extendible structure being pivotablly mounted on base structure for vertical swinging movement about the pivot to raise and lower the outer end thereof, said extendible structure being rotatable to swing said extendible means to a desired circumferential position extending outwardly of the sides of the apparatus and said extendible means having a lowered rest position from which it is raised and swung to one side or the other of said apparatus, outrigger means extendible outwardly of said apparatus for stabilizing the extendible structure when rotated to extend outwardly of a side of said apparatus comprising an outrigger for stabilizing the extendible structure in a predetermined circumferential sector, said outrigger comprising first and second relatively movable telescoping sections, said second section being extendible and retractable relative to said first section between a minimum length storage position and a maximum length extended position for stabilizing the extendible structure, stop rotation means comprising a first element rotatable with said extendible structure and a stop rotation element disposed in the path of said first element for disabling rotation of said extendible means into said sector, means for moving said second section to extend and retract said outrigger, and rotation enabling and disabling means responsive to the extension of said second section as it approaches its fully extended position and moves through a final part of its extension movement for disabling said stop rotation means and enabling the rotation of said extendible structure into said predetermined circumferential sector, and to the initial part of the movement away from said fully extended position for enabling said stop rotation means to disable rotation into said sector.
- 2. In an apparatus as defined in claim 1, hydraulic cylinder means for lowering said outrigger to place the outer end thereof into contact with the ground for stabilizing purposes including control means for operating said hydraulic cylinder means with said outrigger in extended or retracted positions to enable said outrigger to be moved downwardly when partly extended to function as a stabilizing jack close to the apparatus relative to its fully extended position, the extension of the outrigger for functioning as a jack being insufficient to disable said stop rotation means.
- 3. In an apparatus as defined in claim 1 which said means for enabling and disabling rotation into said sector comprises actuating means on one of said sections, and cooperating means engagable with said actuating means as the second section approaches its fully extended position to effect the enabling of the rotation of said extendible structure into said sector and to initial movement away from said extended position to disable rotation into said sector.
- 4. In an apparatus as defined in claim 3 in which said actuating means comprises a fixed element on and movable with said second section and said cooperating means comprises a rod disposed along the path of travel of said second section, said rod having a second element engaged by said fixed element in a predetermined relative position of said first and second sections to actuate said rod as the second section moves to its extended position.
- 5. In a mobile apparatus having aerial structure laterally swingable into a sector of operation requiring outrigger stabilization and means for precluding rotation into the sector comprising a retractable stop rotation member, an outrigger comprising first and second relatively movable telescoping sections, said second section being extendible from a storage position to an outrigger stabilizing position and retractable to said storage position, actuating means carried by said outrigger comprising first and second elements mounted on said first and second sections respectively, one of said elements being movable with said second section to engage the other of said elements as said second section approaches its fully extended position to actuate the retraction of the said stop rotation member and initiating the resetting of said stop rotation member during the initial portion of movement of said second section away from said fully extended position toward its storage position.
- 6. In an apparatus as defined in claim 5 in which said first element is fixed to said second section adjacent the inner end thereof and said second element is a movable member yieldably biased to a first position, said movable member having a part thereon engaged by said first element as said second section approaches its fully extended position to move said rod with the second section against said bias to effect movement of said stop rotation member to effect the withdrawal of the stop rotation member and to enable said bias to move said movable member to effect the resetting of said stop rotation member during the initial movement of said second section from said its fully extended position.
- 7. An outrigger for a mobile apparatus having laterally swingable aerial structure and a retractable stop rotation member for limiting the swinging of the aerial structure unless an outrigger is set, said outrigger comprising first and second relatively moveable telescoping sections, said second section being extendible from a storage position to an outrigger stabilizing position and retractable to said storage position, actuating means carried by said outrigger comprising first and second elements, one of said elements being movable with said second section to engage the other of said elements as said second section approaches its fully extended position to actuate the retraction of said stop rotation member and for effecting the resetting of said stop rotation member as said second section moves away from said fully extended position toward its storage position.
- 8. An outrigger as defined in claim 7 in which said second element is a rod extending lengthwise of said second section and biased to a first position relative to said first section, and a crank lever on said first section operable to effect withdrawl of said stop rotation member, and connecting means on said first section connecting said rod to actuate said crank lever on movement of rod as said second section approaches and moves away from its fully extended position.
- 9. In an apparatus as defined in claim 1, 2, 3, 4, 5, or 6 in which said extendible structure is a fire truck and said extendible structure is a ladder mounted on a rotatable platform which is rotated to swing the ladder.
- 10. In an apparatus as defined in claim 5, hydraulic cylinder means for lowering said outrigger to place the outer end thereof into contact with the ground for stabilizing purposes including control means for operating said hydraulic cylinder means with said outrigger in extended or retracted positions to enable said outrigger to be moved downwardly when partly extended to function as a stabilizing jack close to the apparatus relative to its fully extended position, the extension of the outrigger for functioning as a jack being insufficient to disable said stop rotation means.
Parent Case Info
The present application is a continuation-in-part of an application filed by Thomas R. Nist and Edward V. Garnett on Feb. 7, 1989, Ser. No. 07/307,898 now U.S. Pat. No. 4,941,546.
US Referenced Citations (8)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
307898 |
Feb 1989 |
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