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US 4,949,808 AGranted
Aerial apparatus and stabilizing means therefor
AssigneeFiggie International Inc.
InventorEdward V. Garnett
Life of this patent
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AssigneeFiggie International Inc.
InventorEdward V. Garnett
Estimating the term…
An aerial apparatus swingable outwardly of a fire truck chassis is stabilized by outriggers on opposite sides of the chassis with the aerial apparatus being swingable to one side or the other only if an extendible section of an outrigger for that side has been moved relative to its base section from a storage position to a fully extended outrigging position on that side. The swinging of the apparatus to a side of the chassis is enabled by withdrawing stop means which is spring urged into the path of rotation of the apparatus to that side. The withdrawal of the stop means is actuated mechanically by means on the extendible section engaging and moving an actuating rod carried by the base section for the extendible section to effect operation of a linkage to withdraw the stop means against its spring bias. On retraction of the extendible section from its fully extended position, the spring urged stop means resets as the extendible section leaves the fully extended position. The base and extendible section are moved vertically about a pivot by hydraulic means having a stroke such that the outrigger may also be used as a jack which engages the ground close to the chassis.
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.
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.
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.
Dependencies are inferred from the claim text.