Fingered bola body, bola with same, and methods of use
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsJohn M. Dzenitis, Linda W. Billica
Life of this patent
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Abstract
A bola body, a bola, and methods employing such bola bodies and bolas; in one aspect a bola body having a non-spherical body member from which extend one or more fingers for entanglement with a bola line, with each other, or for latching onto part of a target body.
Claims2
A self-rescue device for an astronaut working in reduced gravity outside a space vehicle having a plurality of cylindrical truss members, said device comprising:
- a tether line,
- a plurality of bolas, each having a nose portion and a body portion, the body portion being rectangular and the nose portion being pyramidal,
- a plurality of bola lines attached to the tether line and extending through the nose portion of the bolas, and
- the nose portion of each bola being provided with four angularly extending fingers one finger extending from each corner of the pyramidal nose portion past the apex thereof and being at an angle of between about 45 degrees to about 80 degrees to the surface of the pyramidal nose portion whereby there will be entanglement with its bola line, the bola line of another bola when the bolas wrap around a truss member thereby preventing disengagement thereof when tension is applied to the tether line.
A method for effecting the rescue of an untethered astronaut who is floating away from a space vehicle having a plurality of cylindrical truss members, said method comprising:
- a self-rescue device comprising a tether line, the tether line having a plurality of bolas attached thereto by secondary lines, each bola having a body portion and a nose portion and a plurality of angularly extending fingers projecting from the juncture of the body and nose portion and extending past the nose portion;
- the astronaut manually moving the self-rescue device in the direction of a truss member of the space vehicle;
- the bolas wrapping themselves about the truss member;
- the projecting fingers of each bola engaging the secondary line of the bola, the secondary line of another bola, or the tether thereby securing the bolas about the truss member;
- and
- the astronaut applying tension to the tether while moving toward the space vehicle.
Dependencies are inferred from the claim text.