The Counter Balanced Motion (CBM) design utilizes the seat cushion as a crash safety restraint. Just as the air bag becomes a cushion to absorb deceleration forces on the upper body, the seat cushion is used to absorb deceleration forces on the lower body.
Crash simulations of the CBM yield a 33 to 70% reduction in injury loads to the chest and legs. This brings applied forces below bone and joint failure loads.
In addition, impact loads applied to the lower leg become negligible by retracing the feet away from the toe pan and Head Injury Criterion values are reduced 13 to 30%.
The appearance and posture alignment of seats equipped with the CBM mechanism are identical to current production seats. Figure 1.
This paper describes the CBM Seat mechanics, design and function. The functional capabilities are verified by three different, independently performed approaches:
Serber, H. The Study of Lumbar Motion in Seating Hard Facts about Soft Machines: The Ergonomics of Seating Rani Lueder and Kageyu Noro, Taylor & Francis 1994 423 431
Stadler, W. Johnson, A.B. Multicriterion Response of a Dynamically Responsive Safety Seat Symposium on Optimization of Mechanical Systems University of Stuttgart Stuttgart, Germany 1995
Serber, H. U.S. Pat. # 5,244,252 Seat Assembly and Method September 14 1993
Serber, H. U.S. Pat. # 5,460,427 Seat Assembly and Method October 24 1995
Serber, H. U.S. Pat. # 5,558,399 Seat and Lumbar Motion Chair, Assembly and Method September 24 1996
Atkinson, P. Mackenzie, C. Haut, R. Michigan State University, Patellofemoral Joint Fracture Load Prediction Using Physical and Pathological Parameters Mechanics of Protection Society of Automotive Engineers, Inc 1998
Cited By
View/Annotate
Content Loading, Please Wait
Document Preview
Content Loading, Please Wait
Document Comparison
Content Loading, Please Wait
Download
A list of downloadable items.
Product Code
Document Title
File Type
Download
1999-01-0632
Counter Balanced Motion (CBM)-Dynamic Seating—New Seat Mechanics to Reduce Occupant Injury and Enhance Comfort
Export Metadata
This modal will allow the user to download citation information or export specific fields of data into one of three file formats: Excel, comma-separated values, or text.
You are currently not logged into your Dashboard account, which is required for annotating.
Please select Login to login or register for the Dashboard. Select Continue to view the content without the ability to annotate.
Redline Warning
You are currently not logged into your Dashboard account, which is required for annotating.
Please select Login to login or register for the Dashboard. Select Continue to view the content without the ability to annotate.
Data Set Warning
Counter Balanced Motion (CBM)-Dynamic Seating—New Seat Mechanics to Reduce Occupant Injury and Enhance Comfort
SAE Journal Subscriptions are available in a variety of options, which include electronic, electronic with back file, and archive. For detailed information and options, please complete the following:
Content Request
Check My Access!
You may already have access to the Technical Paper, Counter Balanced Motion (CBM)-Dynamic Seating—New Seat Mechanics to Reduce Occupant Injury and Enhance Comfort
Subscription Access
If you have Subscription Access with a username and password, please login below.
Institutional Login
If you have Institutional Access to SAE MOBILUS, using a predetermined organizational login utilizing single-sign-on (Shibboleth), please login below. To request institutional access to SAE MOBILUS, please complete the institutional subscription information form.
Purchase
If you do not have access to SAE MOBILUS via username/password or institutional access, you can still purchase the Technical Paper, Counter Balanced Motion (CBM)-Dynamic Seating—New Seat Mechanics to Reduce Occupant Injury and Enhance Comfort.
Search Tips: Search Operators:AND, OR, NOT; Wild Cards; Using Quotes
SAE MOBILUS® Search Tips
Please note: All terms not contained within quotes, will be evaluated using the OR operator. This means that your search results will contain all results that contain ANY of the entered terms.
AND, OR, NOT
SAE MOBILUS supports the use of the AND, OR and NOT BOOLEAN operators ONLY function with the Advanced Search.
Wild Cards
Using the asterisk, ( * ) allows you to search for a partial word. For example, entering a keyword search of aero* will search for any word beginning with aero.
Using the question mark, ( ? ) allows you to search for a word with a single character wildcard. For example, searching for t?re would match both tire and tyre
Using Quotes
Words in double quotes " " are treated as a phrase. Conducting a search for "heat model" will return all results in which the exact phrase "heat model" is found, while "heat modeling" would NOT be included.
A term combined with a phrase will be joined with an OR operator.
Searching for Standards
When searching for a standard please use the entire Document Number assigned, which includes the abbreviation. A space can be used, or omitted between the abbreviation and number.
