Device for offsetting prosthetic components
An offset alignment device with a longitudinal axis is provided that can offset two prosthetic components a selected distance along an alignment axis that is selectably oriented in a plane that is generally perpendicular to the longitudinal axis, and can also adjust the distance between the two prosthetic components in a direction generally parallel to the longitudinal axis. The present invention comprises first and second members. The first member has a channel and the second member has a bar for being adjustably connected to the channel along the alignment axis. A set screw can be through a hole in the wall of the channel in a direction generally perpendicular to the alignment axis to contact the bar and hold it stationary within the channel. One or both of the first and second members can be rotatably connected to one or both of the first and second prosthetic components, respectively.
1. An alignment device for being used with prosthetic components, said alignment device having an alignment device longitudinal axis and consisting of:
A. a first monolithic member comprising:
i. a first member first end connectable to a first prosthetic component; and
ii. a first member second end having a channel therethrough with a channel first end and a channel second end, and a channel longitudinal axis; and
B. a second monolithic member comprising:
i. a second member first end connectable to a second prosthetic component; and
ii. a second member second end comprising a bar with a bar first end and a bar second end, and having a longitudinal axis between said bar first end and said bar second end, said bar being received within and secured to said channel of said first member, said second member being selectably offset from said first member in one of a first direction generally parallel to said channel longitudinal axis and a second direction generally opposite of said first direction,
wherein said bar first end is outside of said channel when said bar second end is between said channel first end and said channel second end when said first member is offset in said first direction from said second member,
wherein said bar second end is outside of said channel when said bar first end is between said channel first end and said channel second end when said first member is offset in said second direction from said second member, and
wherein one of said first member first end and said second member first end is threadably connectable to one of the first prosthetic component and the second prosthetic component, respectively, to allow said alignment device to be rotatably connected to said one of the first prosthetic component and the second prosthetic component such that the orientation of said channel longitudinal axis is selectably adjustable to any orientation lying in a plane that is generally perpendicular to said alignment device longitudinal axis.
2. The alignment device of claim 1 wherein said first member first end comprises a threaded external surface.
3. The alignment device of claim 1 wherein said first member first end comprises an internally threaded clamp.
4. The alignment device of claim 1 wherein said second member first end comprises a pyramid.
5. The alignment device of claim 1 wherein said second member first end comprises a pyramidal receiver.
6. The alignment device of claim 1 wherein said one of said first member first end and said second member first end that is threadably connectable to said one of the first prosthetic component and the second prosthetic component, respectively, can be further rotated a selected number of one half revolutions with respect to said one of the first prosthetic component and the second prosthetic component to maintain said selected orientation of said channel longitudinal axis and to selectably adjust the distance between the first prosthetic component connectable to said first member first end and the second prosthetic component connectable to said second member first end.
7. The alignment device of claim 1 wherein:
said first member second end has a hole therethrough into said channel and that is perpendicular to said channel longitudinal axis, said hole capable of receiving a screw for contacting said bar for securing said bar in place within said channel.