Passage-defining prosthetic limb structure and fabrication method
A prosthetic device includes an internal frame assembled from multiple longitudinal members and multiple transverse members that are substantially planar in character and are arranged to be joined together. A medially arranged opening is defined in each transverse member, and is substantially registered with openings of adjacent transverse members to form a longitudinal passage, such as may be useful to receive an actuator and/or other items. At least some transverse members differ from one another in one or more of shape, length, or width. A covering member may be provided over the internal frame. Rear-facing gaps in transverse members may receive one or more elements such as dampers, batteries, or the like.
1. A prosthetic device sized and shaped to correspond to at least a portion of a limb of a human user, the prosthetic device comprising:
an internal frame that comprises:
a plurality of longitudinal members, wherein each longitudinal member of the plurality of longitudinal members is substantially planar and comprises a plurality of first peripheral slots defined through an entire thickness of the respective longitudinal member; and
a plurality of transverse members, wherein each transverse member of the plurality of transverse members is substantially planar and comprises a plurality of second peripheral slots defined through an entire thickness of the respective transverse member;
wherein each first peripheral slot of the plurality of first peripheral slots is arranged to mate with a different second peripheral slot of the plurality of second peripheral slots, to join the plurality of longitudinal members with the plurality of transverse members;
wherein each transverse member defines a medially arranged opening, and the medially arranged opening of each transverse member is substantially registered with the medially arranged opening of at least one adjacent transverse member; and
wherein at least some transverse members of the plurality of transverse members differ from other transverse members of the plurality of transverse members in one or more of shape, length, or width.
2. The prosthetic device of claim 1 , wherein the plurality of longitudinal members is devoid of any longitudinal members that are radially arranged relative to a central axis extending through the plurality of transverse members.
3. The prosthetic device of claim 2 , wherein longitudinal members of the plurality of longitudinal members are tangentially arranged relative to an imaginary circle concentrically arranged with the central axis, wherein the imaginary circle comprises a diameter smaller than a lateral extent of each transverse member of the plurality of transverse members.
4. The prosthetic device of claim 1 , further comprising at least one of an actuator or a control element extending through medially arranged openings of multiple transverse members of the plurality of transverse members.
5. The prosthetic device of claim 1 , wherein two or more transverse members of the plurality of transverse members each define a peripheral recess, wherein for each transverse member of the two or more transverse members, at least two peripheral slots of the plurality of second peripheral slots extend from the peripheral recess into an interior of the transverse member without intersecting the medially arranged opening.
6. The prosthetic device of claim 5 , wherein the peripheral recess of each transverse member of the two or more transverse members is registered with the peripheral recess of each other transverse member of the two or more transverse members.
7. The prosthetic device of claim 1 , wherein two or more transverse members of the plurality of transverse members each define a peripheral recess, wherein the peripheral recess of each transverse member of the two or more transverse members is registered with the peripheral recess of each other transverse member of the two or more transverse members.
8. The prosthetic device of claim 7 , further comprising at least one of an actuator, an energy storage element, a sensor, or a control element arranged in the peripherally arranged recesses of the two or more transverse members.
9. The prosthetic device of claim 1 , further comprising an outer shaping member arranged to cover and compressively engage at least a portion of the internal frame.
10. The prosthetic device of claim 1 , wherein at least two transverse members of the plurality of transverse members are arranged substantially perpendicular to the plurality of longitudinal members.
11. The prosthetic device of claim 1 , wherein the plurality of transverse members is bonded to the plurality of longitudinal members.
12. The prosthetic device of claim 1 , wherein at least some members of at least one of (i) the plurality of longitudinal members or (ii) the plurality of transverse members comprises polymeric materials.
13. The prosthetic device of claim 1 , wherein at least some members of at least one of (i) the plurality of longitudinal members or (ii) the plurality of transverse members comprises paperboard materials, wood fiber-based materials, or laminated composite materials.
14. The prosthetic device of claim 1 , wherein at least some members of at least one of (i) the plurality of longitudinal members or (ii) the plurality of transverse members comprises metals or metallic materials.
15. The prosthetic device of claim 1 , wherein the plurality of longitudinal members consists of four longitudinal members.
16. The prosthetic device of claim 1 , further comprising a socket positioned at an upper end of the internal frame, wherein the socket is configured to receive a residual limb of the human user.
17. A method for fabricating a prosthetic device according to claim 1 , the method comprising mating each first peripheral slot of the plurality of first peripheral slots with a different second peripheral slot of the plurality of second peripheral slots to join the plurality of substantially planar longitudinal members with the plurality of substantially planar transverse members to form the internal frame of the prosthetic device.
18. The method of claim 17 , further comprising bonding at least some transverse members of the plurality of substantially planar transverse members to the plurality of substantially planar longitudinal members.
19. The method of claim 17 , further comprising providing an outer shaping member to cover at least a portion of the internal frame.
20. The method of claim 17 , further comprising measuring one or more dimensions of a prosthetic recipient, and fabricating (i) the plurality of substantially planar longitudinal members and/or (ii) the plurality of substantially planar transverse members responsive to said measuring.
21. The method of claim 17 , further comprising fabricating at least some members of (i) the plurality of substantially planar longitudinal members and/or (ii) the plurality of substantially planar transverse members by at least one step selected from thermoforming, molding, stamping, or casting.
22. The method of claim 17 , further comprising fabricating at least some members of (i) the plurality of substantially planar longitudinal members and/or (ii) the plurality of substantially planar transverse members by at least one step selected from milling, blade cutting, laser cutting, or liquid jet cutting.
23. The method of claim 17 , further comprising fabricating at least some members of (i) the plurality of substantially planar longitudinal members and/or (ii) the plurality of substantially planar transverse members by at least one step selected from three-dimensional printing or multi-layer additive material deposition.