Aerial ladder rotation limiter

摘要

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 Rotation of the base is thereby confined to a sector where the pins have been retracted by deployment of the associated outriggers.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.