Self centering femoral drill jig
First Claim
1. A hand-held drill jig for locating and maintaining a central axis through a head and an associated neck of a femur enabling a drill hole to be formed in the femoral head oriented to said central axis comprising:
- guide means having a bore with a longitudinal axis for guiding movement from a superior position of a drill bit oriented to said central axis toward and into cutting engagement with the femoral head; and
positioning means engageable with the femur at spaced locations for rendering said guide means immobile relative to the femur and for aligning the longitudinal axis of said guide means relative to said central axis, said positioning means including;
head positioning means mounted on said guide means engageable at spaced locations with the outer peripheral surface of the femoral head; and
neck positioning means mounted on said guide means engageable at spaced locations with the outer peripheral surface of the femoral neck;
said head and said neck positioning means jointly causing said longitudinal axis to be oriented with said central axis when said head positioning means is engaged with the outer peripheral surface of the femoral head and when said neck positioning means is engaged with the outer peripheral surface of the femoral neck.
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Accused Products
Abstract
A hand-held drill jig is utilized to locate and maintain a central axis through a head and an associated neck of a femur enabling a blind hole to be drilled into the femoral head oriented to the central axis. The drill jig is adjustable to accommodate a broad range of sizes of femurs and can be readily attached to, then removed from, the femur. A positioning mechanism is provided to firmly engage both the outer peripheral surface of the femoral head and the femoral neck. This operation renders associated drill bushing immobile relative to the femur and orients its longitudinal axis with the central axis. A drill bit is then capable of being guided through the drill bushing and into cutting engagement with the femoral head.
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Citations
5 Claims
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1. A hand-held drill jig for locating and maintaining a central axis through a head and an associated neck of a femur enabling a drill hole to be formed in the femoral head oriented to said central axis comprising:
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guide means having a bore with a longitudinal axis for guiding movement from a superior position of a drill bit oriented to said central axis toward and into cutting engagement with the femoral head; and positioning means engageable with the femur at spaced locations for rendering said guide means immobile relative to the femur and for aligning the longitudinal axis of said guide means relative to said central axis, said positioning means including; head positioning means mounted on said guide means engageable at spaced locations with the outer peripheral surface of the femoral head; and neck positioning means mounted on said guide means engageable at spaced locations with the outer peripheral surface of the femoral neck; said head and said neck positioning means jointly causing said longitudinal axis to be oriented with said central axis when said head positioning means is engaged with the outer peripheral surface of the femoral head and when said neck positioning means is engaged with the outer peripheral surface of the femoral neck. - View Dependent Claims (2, 3, 4, 5)
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Specification