Elongate element for transmitting forces
First Claim
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1. An elongate element for transmitting forces during drilling of a bone marrow cavity comprising:
- a tubular body extending along a longitudinal axis, said tubular body having a plurality of slots each open to an outer diameter (D) of the tubular body and extending in a plane transversally to the longitudinal axis, said slots grouped in repeating angularly offset patterns of more than two slots, the angularly offset patterns repeating at least several times along the longitudinal extent of the tubular body each of said slots cut through a wall of said body, each of said slots spaced along said axis from adjacent slots a distance of between >
5% and <
40% of the tube outer diameter (D) and said more than two slots of said repeating pattern being angularly offset from adjacent slots at an angle of between 20° and
<
180° and
connected to the adjacent slots by web regions and each of said slots extend transversely into the body with a depth (T) of <
90% of the tube outer diameter (D).
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Abstract
A hollow elongate element of elastic material for transmitting forces in which the walling comprises openings which reduce the bending resistance moment and are arranged such that the torsion resistance moment of the element essentially remains.
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Citations
14 Claims
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1. An elongate element for transmitting forces during drilling of a bone marrow cavity comprising:
a tubular body extending along a longitudinal axis, said tubular body having a plurality of slots each open to an outer diameter (D) of the tubular body and extending in a plane transversally to the longitudinal axis, said slots grouped in repeating angularly offset patterns of more than two slots, the angularly offset patterns repeating at least several times along the longitudinal extent of the tubular body each of said slots cut through a wall of said body, each of said slots spaced along said axis from adjacent slots a distance of between >
5% and <
40% of the tube outer diameter (D) and said more than two slots of said repeating pattern being angularly offset from adjacent slots at an angle of between 20° and
<
180° and
connected to the adjacent slots by web regions and each of said slots extend transversely into the body with a depth (T) of <
90% of the tube outer diameter (D).- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A flexible force transmitting shaft for forming an opening in the marrow cavity of a long bone comprising:
- a
a tubular body for driving a marrow space drill, said tubular body extending along a longitudinal axis and having a plurality of slots open at the outer diameter (D) of the tubular body in a wall of said tubular body extending transversely to said axis, said slots grouped in repeating angularly offset patterns of more than two slots, the angularly offset patterns repeating at least several times along the longitudinal extent of the tubular body each of said slots spaced along said axis from adjacent slots a distance of between >
5% and <
40% of the tube outer diameter (D) and said more than two slots of said repeating pattern being angularly offset from adjacent slots around said shaft at an angle of between 20° and
<
180°
to form a helical pattern and each of said slots extend transversely into the body with a depth (T) of <
90% of the tubular outer diameter (D).- View Dependent Claims (11, 12, 13, 14)
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Specification