Rollbar

Details Rollbar Rollbar

1999-07-19

2001-11-13

Johnson, Brian J. (Department: 3618)

Land vehicles

Wheeled

Attachment

Reexamination Certificate

active

06315326

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a rollbar for an automotive vehicle, in particular for an open sports car.
2. Description of Related Art
A rollbar in an automotive vehicle serves to protect the passengers, but in an open sports car also constitutes a design feature which influences the esthetic overall impression. Conventional rollbars that extend over the entire vehicle width are steel or light-metal tube constructions or steel-case welding constructions which have a considerable additional weight and constitute a mass located at an undesiredly high level. Furthermore, such rollbars of the prior art are by far overqualified for individual loads, most of the time because of manufacturing reasons (use of constant cross-sections).
It is the object of this invention to provide a vehicle-bridging rollbar of the above-mentioned type which is lightweight and optimally designed for individual types of loads.
BRIEF SUMMARY OF THE INVENTION
Longitudinal ribbings of a basic shell body which are alternately raised towards the interior and exterior, respectively, and extend in approximately straight fashion over the longitudinal extension ensure the necessary stiffness for all types of loads in a flat cross-section of the rollbar which is located in a direction transverse to a main rollbar plane. The monocoque or shell-type construction with the longitudinal, stiffness-ensuring ribbings reduces the weight considerably in comparison with conventional rollbars and permits an integration of the rollbar into the car body in an advantageous manner as regards esthetical appearance and design.
Embodiments of the subject matter of the invention will now be explained with reference to the drawings, in which:


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patent: 6179327 (2001-01-01), Muller et al.
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patent: WO 97 48506 (1997-12-01), None
Popular Mechanics Web Site www.popularmechanic.com brochure titled “Tu, the Small Wonder” illustrating a convertible with a corbon-fiber rollbar, Dec. 1994.*
Nautica Magazine Web Site www.nauticait brochures titled “Boatshow” illustrating a boat with a fiberglass rollbar (2-brochures) Dec. 1994.*
Paper Presented by US Army to SAMPE Technical Conference of 11/90 —titled Light Weight Composite Rollbar for Army Towed Howitzwer.

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