Interpretation ID: nht80-3.37

DATE: 08/20/80

FROM: AUTHOR UNAVAILABLE; Ralph J. Hitchcock; NHTSA

TO: James Monaghan

TITLE: FMVSS INTERPRETATION

TEXT: This is in response to your letter of July 18, 1980, regarding your Simplified Passenger Air Bag.

We have noted the changes in your patent. If, as you say, the pads are automatically rotated into place when the occupant gets into the vehicle and closes the door and protection is provided without the occupant having to take any action, your system would be considered to be automatic (passive) within the meaning of Federal Motor Vehicle Safety Standard No. 208, Occupant Crash Protection.

I am placing a copy of your letter in our public docket. Thank you for your continued interest in automobile safety.

Sincerely,

ATTACH.

SIMPLIFIED PASSENGER AIRBAG

The attached copy of an article from the Miami Herald of May 12, 1980, entitled "Air Bags Give Questionable Protection," draws attention to the urgency of good decisions being made regarding airbags before the "1982 Model" year.

Though the airbag method of restraint is the most resilient, most people are aware that the publicized design describes an expensive, noisy and one-shot device with many problems, and of which the public is apprehensive.

However, the new reusable patented "Monaghan Simplified Passenger Airbag" solves these problems and, in addition, solves the four other difficulties which the Miami Herald article correctly pinpoints. Refer to Monaghan Illustration Fig. 4.

Difficulty #1: "The present design provides little or no protection in side impacts." However, the Monaghan Airbag, in Patent 3,888,329, Claim 5, states, "restraint pad includes rearwardly projecting sidewalls for restraining the occupant from sidewards movement." Further protection may be had if seat upholstery is shaped to receive the sidewalls. Refer to Fig. 4, shown in phantom.

Difficulty #2: ". . . little protection against rollovers." Refer to Monaghan Illustration Fig. 4 - the airbag, when inflated, is locked by the rotor over the knees with a downward pressure of approximately 400 pounds on an area of 1.5 square feet.

Difficulty #3: Present design provides "no protection on second impact after a frontal collision when the bags deflate." Refer to Monaghan Patent 3,888,329, Claim 9. This includes "time extension means for automatically extending the period of actuation of said power means upon the sensing of a plurality of successive accident events -- during the accident."

Difficulty #4: This refers in particular to seat belts, to the danger of sliding (submarining) under the restraint in an impact. This submarining is resisted by the Simplified Passenger Airbag due to the large frictional area of pressurized contact with the torso, including the sidewalls.

These safety features are only possible with the Monaghan Simplified Passenger Airbag because, first, it is reusable and, of course, can be pre-tested. Claims 1, 5 and 8 indicate it is visibly oriented to contact the passenger's torso and limbs, at short range. When preset, the pad is partly over the occupant and the seat; the passenger will then normally be in the correct position in an accident event.

Since it is not required to explode, it is not noisy; and using ordinary air, it is not toxic. The salesman in the garage can demonstrate, and the regular garage mechanic can adjust or replace the rubber bag which should cost no more than an inner tube.

The Airpad, shown manually preset in attached illustrations, Figs. 1, 2, 3; can be alternatively automatically preset to give the fastest action in an accident event. This is provided by Differential Timing of presetting and inflating. Refer Patent Specifications, Page 8, Lines 41 and 42.

This is obtained by fitting a double-acting push button type hinge switch on the car door. With the car door open, the Airpad will be in the top storage position, held there by spring - Claim 16.

* When the car door is closed, the door hinge switch actuates an electric low-speed rotary incremental motor which swings down the pad arm through 75 degrees to the preset position and electromagnetically locks the rotor shaft.

* When the car door is opened, the hinge switch disengages the magnetic lock and the spring returns the pad to storage.

In an accident event with either system, the Sensor Switch - Claim 2 - acting with the selective control valve - Claim 4 - will supply high pressurized air - Claim 6 - to provide contacting, firm engagement of the Airbag with the occupant - Claim 19 - Test Switch #230 will have been used to adjust and lower the bag pressure via a throttle and check valve on the swing arm close to the airpad.

Return of the restraint to storage after an accident event may be timed by the Sensor Switch to allow a few seconds before automatic pneumatic deflation and reversal of the Rotor releases the passenger. Refer Patent Specifications, Page 7, Lines 30 to 35.

JAMES MONAGHAN

Simplified Passenger Airbag

Page 1, Figure 1: Shows an Auto Passive Restraint, with an inflatable air-pad, positioned in Storage when a passenger takes a seat.

Page 1, Figure 2: Passenger chose to swing the pad to a pre-set position closer to the body for visible protection against panic stops and accidents.

Page 1, Figure 3: With the pad now in the pre-set position, a sensored accident event will instantly and quietly inflate the pad with air at a safe pressure to firmly restrain the passenger with minimum shock and to lock the rotor.

Figure 4, Below: Shows the restraint remaining in storage when the passenger chooses to be inactive. In a sensored accident event, the pad automatically swings down by air rotor, inflating simultaneously to restrain the passenger.

Special Note: This sensored safety device is reusable and can be pre-tested. It will actuate whether the pad is in the storage or the pre-set position. The patent includes "sensing means for ultra-rapidly restraining a vehicle occupant from moving, with two combined restraining forces."

(Graphics omitted)

Figure 4

U.S. Patent 3,888,329 Inventor: James Monaghan

Michael M. Finkelstein -- Associate Administrator for Rulemaking, NHTSA

Dear Mr. Finkelstein:

Many thanks for your letter of January 27, 1980, in regard to my Simplified Passenger Airbag. I agree that "the system would be slightly more feasible if the pads were automatically rotated into position after entering the vehicle."

If not considered a "forced action system," automatic presetting can be obtained within the cover patent #3,888,329 as follows.

Please refer to the patent specifications, Page 8, Lines 41 and 42. It states there: "If desired, differential timing between the air cushion and cylinder 208 could be provided." This is explained in the revised write-up of page one & page two, enclosed.

I agree that time-saving is very important and believe that Differential Timing will overcome the negligence of the few who might not even lower the pad to improve their vision over the dash. Also, it permits an increase in torso contact without being a hazard to a smoker. Enclosed is a revised copy of illustration Fig. 4. x

x P.S. The Simplified Passenger Airbag avoids vulnerable areas of the Torso.

I do not wish this Airbag to be used with front child seats; however, you indicate that my rear seat restraints for children have your interest.

Thank you for the Auto company addresses; I will write fully to them when I receive a reply from you.

Please confirm that the use of this door switch will permit NHTSA to retain patent 3,888,329 as a Passive Restraint. I would deeply appreciate an early reply, especially for age considerations. I am now in my eighties.

Sincerely,

James Monaghan

cc: Adminstrator Claybrook