Thor-Lx Advanced Lower Extremity (Thor-LX/HIIIr)
The version of the mid-male Thor-Lx presently being released, denoted as Thor-Lx/ HIIIr, is intended for Hybrid III retrofit use, and mounts directly to the distal end of the Hybrid III femur. The Thor-Lx/ HIIIr assembly (see figures 1 and 2) is thus comprised of the Thor-Lx foot and ankle segments, the Thor-Lx tibia segment (with integrated Achilles assembly), the stock Hybrid III knee housing, a modified Hybrid III knee flesh, new molded side knee covers, and the stock Hybrid III ball bearing knee slider assembly.
Assembly (w/o flesh)
Figures 3 and 4 illustrate the mechanical component and instrumentation layouts, respectively, of the Thor-Lx mid-male Hybrid III retrofit assembly.
Figure 3: Thor-Lx 50th Percentile Male Hybrid III Retrofit
Assembly - Mechanical Components
Figure 4: Thor-Lx 50th Percentile Male Hybrid III Retrofit
Assembly - Instrumentation
The Thor-Lx/ Hybrid III retrofit assembly includes the following new elements, as compared to the existing Hybrid III leg design:
A compliant tibia element, which modulates tibia response to axial impact to more realistically reflect human data
Provision for independent control of foot mobility about three axes of rotation (dorsiflexion/plantarflexion, inversion/eversion, and internal/external rotation), by means of progressive rubber elements whose characteristics are guided by human data
A representation of the Achilles tendon load path, which contributes to improved realism of tibia axial forces and bending moments
Upper tibia forces and moments (Fx, Fz, Mx, My)
Lower tibia forces and moments (Fx, Fy, Fz, Mx, My)
Tibia accelerations at mid-shaft (Ax, Ay)
Foot rotations about 3 axes
Mid- foot accelerations (3 axes)
Achilles tension (uniaxial, optional)
A detailed description of the design rationale and the process of development of Thor-Lx may be found in Reference 1.NOTICE OF UPDATE TO VERSION 3.2
This version 3.2 release consists of the following downloadable components:
- Thor-Lx/ HIIIr AutoCAD DRAWING PACKAGE, in AutoCAD 2000 format
Thor-LX - HIIIr Drawing Package Zipped AutoCAD 2000
- UPDATE 7/15/2002: Definition of Tibia Flesh Surface Geometry
- Supporting Text Documents, as follows (pdf format).
- Thor-Lx/ HIIIr USERS’ MANUAL
- Thor-Lx/ HIIIr CERTIFICATION PROCEDURES DOCUMENT (note that certification procedures, performance requirements, and test fixtures are unchanged from version 3.0 - pdf file - updated 1/10/2005)
PLEASE NOTE: The NHTSA has stipulated that all Thor-Lx/ Hybrid III retrofit hardware manufactured and delivered for use must conform to the specifications and certification performance requirements as defined within this release. Further, the NHTSA has stipulated that all certification performance data must accompany newly manufactured and delivered Thor-Lx/ HIIIr hardware.
Two related NHTSA technical papers (Kuppa et al, 2001) may be of interest to users of Thor-LX and Thor-FLx hardware, and were presented at the 17th International Technical Conference on the Enhanced Safety of Vehicles, in Amsterdam, Holland:
- Lower Extremity Response and Trauma Assessment Using the Thor-Lx/HIIIr and the Denton Leg in Frontal Offset Vehicle Crashes
- Lower Extremity Injuries and Associated Injury Criteria
For further information contact Dan Parent by e-mail at firstname.lastname@example.org.