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Interpretation ID: nht94-4.17

TYPE: INTERPRETATION-NHTSA

DATE: August 31, 1994

FROM: Harold Sousa

TO: Counsel, NHTSA

TITLE: NONE

ATTACHMT: Attached to 1/4/95 letter from Philip R. Recht to Harold Sousa (A43; Std. 121; Part 551)

TEXT: I represent a factory in Brazil that manufactures special product that prevents the air from escaping from the tires of trucks and buses. In addition, the product keeps the pressure in the tire in the case of a puncture.

This system uses air from the brake system of the vehicle if there is a hole in the tire, air will be supplied until the driver finds a place to repair or change the tire.

Several companies in Brazil have been using the air-system like an insurance requirement which avoids problems like:

* stopping on a highway or anywhere to change the tire therefore loosing time,

* if one of the double back tires is damaged, the system supplies air that won't overload the other tire, avoiding an explosion of the good tire.

I'm explaining this product because I would like to import this system from Brazil to the U.S.A. And I have to be sure that I am not breaking the laws of this country

I included a copy of this procedure installed in a wheel.

I hope to hear from you soon,

Enclosure

(Photo omitted.)