Aerial ladder rotation limiter
First Claim
1. Aerial apparatus comprising a platform, vertically extendible means mounted on said platform, said platform being rotatable to position said vertically extendible means for use at a desired circumferential location, stabilizing means extendible outwardly of said platform for stabilizing said vertically extendible means within a predetermined circumferential sector, and means responsive to extension of said stabilizing means for permitting said vertically extendible means to be positioned only within said predetermined circumferential sector.
6 Assignments
0 Petitions
Accused Products
Abstract
A fire truck includes an aerial ladder mounted on a rotatable base and outriggers on each side of the truck to stabilize the ladder in use. The outriggers may be deployed on only one side of the vehicle to permit use in confined areas. The ladder base is interlocked with the outriggers to permit the ladder to be positioned only on the side of the fire truck stabilized by the deployed outriggers. A retractable pin is connected through a mechanical linkage to each outrigger. Stop blocks mounted on opposite sides of the rotatable base contact any extended pins. Rotation of the base is thereby confined to a sector where the pins have been retracted by deployment of the associated outriggers. Small auxiliary jacks on each side of the fire truck are deployed in response to deployment of the outriggers on the opposite side of the truck. The jacks provide stability when the aerial ladder is used as a water tower for supporting a high pressure hose.
67 Citations
17 Claims
- 1. Aerial apparatus comprising a platform, vertically extendible means mounted on said platform, said platform being rotatable to position said vertically extendible means for use at a desired circumferential location, stabilizing means extendible outwardly of said platform for stabilizing said vertically extendible means within a predetermined circumferential sector, and means responsive to extension of said stabilizing means for permitting said vertically extendible means to be positioned only within said predetermined circumferential sector.
- 10. Aerial apparatus comprising a platform, vertically extendible means mounted on said platform, said platform being rotatable to position said vertically extendible means at a desired circumferential location, first and second stabilizer means extendible outwardly of said platform for stabilizing said vertically extendible means within first and second predetermined circumferential sectors, respectively, and means responsive to extension of one of said stabilizer means for permitting said vertically extendible means to be positioned only within the circumferential sector stabilized by the extended stabilizer means.
- 16. Aerial ladder apparatus comprising a platform, an aerial ladder mounted on said platform, said platform being rotatable to position said ladder at desired circumferential locations, first and second stabilizers extendible outwardly of said platform for stabilizing said ladder within first and second predetermined circumferential sectors, respectively, first and second retractable pins in the rotational path of said platform, and mechanical linkage means between each of said stabilizer means and the corresponding retractable pin for retracting said pin in response to extension of the corresponding stabilizer means, whereby said ladder may be positioned only within the circumferential sector stabilized by the extended stabilizer means.
Specification