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|  MIL-T-12407X(AT)
3.6.3.1 Litter support hooks. All litter support hooks shall allow easy insertion and
removal of the litters by the attendants. Hooks shall be capable of accepting and securing handles
1.750 inches in diameter. Hooks shall conform to figure 1 or shall be provided with manual
latching devices. Hooks conforming to figure 1 shall require outward, upward, and inward
movement of the litter to disengage the litter. Hooks with latching devices shall manually lock
closed and prevent movement of the litter out of the hook.
3.6.4 Patient seats. Folding, upholstered, longitudinal seats and backs mounted on both
sides of the vehicle, capable of accommodating eight passengers with a minimum of 18 inches
provided for each passenger, shall be furnished. Seats shall be provided with spring loaded hinge
brackets and shall fold vertically when not in use. The seats, when folded, shall not interfere with
the accommodation of the patients using the cots and litters specified in 3.6.1. Seat depth shall be
not less than 12.500 inches. The seat and seat back padding shall be not less than one inch thick.
Upholstered seats and backs shall be covered with washable, fire-retardant material.
3.6.5 Stowage space. Stowage space shall be provided by enclosing the space under the
patient seats flush with the wheelwells. Enclosed space shall be provided with a hinged type
cover.
*
3.6.6 Vacuum outlet. When specified (see 6.2), a single plug-in, vacuum outlet with self-
sealing valve connection shall be installed at the front of the patient compartment toward the left
side of the vehicle. The plug-in unit shall prevent the entry of dust without the use of a dust cap
or cover and shall allow the attachment and release of secondary equipment with one hand. A
mating male outlet fitting shall be furnished for later connection to a medical hose by means of a
barbed hose end.
*
3.6.6.1 Vacuum installation. A suction line shall be connected between a vacuum source
and the vacuum outlet. The installed suction shall be powerful enough to provide an air flow of at
least 30 liters per minute (1.06 cubic feet per minute) at the end of the delivery tube and shall
create a vacuum of at least 300 millimeters (11.81 inches of mercury) to be reached within
4 seconds after the suction line delivery tube is clamped. The suction line shall use the vacuum of
a 12-volt dc pump or, at the manufacturer's option, shall use the vacuum of the engine when a
gasoline engine driven vehicle is furnished. When the vacuum system of the gasoline engine
driven vehicle is utilized it shall be isolated from the brake system to prevent loss of braking
power; a cylindrical stainless steel reservoir having a volume of not less than 300 cubic inches
shall be provided in the suction line to reduce loss of vacuum during vehicle acceleration; and a
check valve, TRICO part no. 85690-42 or equal, shall be installed in the suction line between the
reservoir and the vacuum source. All suction lines shall be adequately supported to prevent
chafing from movement and vibration. Whenever the line passes through bulkheads, grommets
and fastening devices shall be employed to prevent chafing.
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