Extendable bus crossing arm

Details Extendable bus crossing arm Extendable bus crossing arm

B - Operations, Transporting

60

R

B60R 21/34 (2006.01)

Patent

CA 2639709

A crossing arm for a vehicle having a longitudinal axis includes a plurality of hollow telescoping members. The telescoping members are mounted onto the vehicle and configured for extension parallel to the longitudinal axis. The members define a variable volume chamber, where the chamber has a minimum volume when the members are nested, and the chamber has a maximum volume when the members are extended. An actuator is in fluid communication with the plurality of telescoping members and is configured for delivering fluid to the chamber to move at least one telescoping member with respect to a second telescoping member to extend the crossing arm.

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