Aerial personnel lift including means for automatically controll

Details Aerial personnel lift including means for automatically controll Aerial personnel lift including means for automatically controll

1977-04-25

1978-09-26

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Means maintaining platform level on angularly movable support

Swingable support

182 19, B66F 1104

Patent

active

041163044

ABSTRACT:
An aerial lift comprising a wheeled frame having a telescoping boom pivotally and rotatably mounted thereon. A personnel bucket is pivotally secured to one end of the boom for supporting a person therein. An electrical screw-motor apparatus is pivotally secured to and extended between the bucket and the boom. A plurality of mercury switches are mounted on the bucket and are electrically connected to the screw-motor and the source of electrical power so that the screw-motor is automatically actuated responsive to vertical movement of the boom so as to maintain the personnel bucket in a vertical position at all times. The screw-motor also acts as a snubber to prevent undesirable movement of the bucket at work levels.

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