Accession Number : ADD007015

Title :   Remotely Controlled Cyclic Graphnel Hook Apparatus.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Phillips,Lawrence M ; Morinaga,Marc A

Report Date : 29 Jan 1980

Pagination or Media Count : 8

Abstract : A remotely controlled cyclic grapnel hook apparatus includes a cylinder which has a top and a bottom, the cylinder having a central bore axially therethrough and a counterbore in its top portion. A piston is slidably mounted in the cylinder counterbore, and a piston rod connected to the piston is slidably mounted in the cylinder bore therebelow. The piston and piston rod are biased downwardly by a spring which may be located in the cylinder counterbore. The cylinder has a passage-way to the bottom of the counterbore so that fluid pressure can be applied or released therein for moving the piston and piston rod up or down in the cylinder against the force of the spring. At least one hook is pivoted to the bottom of the cylinder so as to extend outwardly therefrom. The hook has a camming surface which engages the side of the piston rod so that the hook is locked in an upward load carrying position when the piston rod is in a downward position and is free to pivot downwardly to a load releasing position when the piston rod is moved upwardly. With this arrangement the hook apparatus can be remotely controlled to repeatedly pick up and drop various payloads. (Author)

Descriptors :   *Patents, *Grapnels, *Aerial pickup systems, Hooks, Remote control, Aircraft equipment, Helicopters, Pneumatic devices, Pistons

Subject Categories : Helicopters
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE