Adjustable bed for a truck-trailer system

An adjustable bed system or arrangement is provided for positioning in limited space in a truck-trailer system for ready use by a driver thereof. This bed arrangement consists of a pair of base plates pivotally connected together one of the base plates is fixed in position and the other movable base plate is pivotally mounted to the fixed plate for angular elevation. A second pair of vertically spaced plates is mounted below the angularly positioned plate and the upper plate thereof has a pair of spaced rolls for contact with the undersurface of the angularly positioned plate. A shaft-cylinder arrangement is positioned below each roller between the second pair of vertically arranged spaced plates and each shaft-cylinder arrangement is elevated by a pressurized reservoir or air bag controlled by a control valve coupled to a source of air pressure to elevate the moveable base plate.

BACKGROUND AND SUMMARY OF THE INVENTION 
This invention relates to bed apparatus, and more particularly to an 
adjustable bed system for use in transportation equipment, such as 
truck-trailer arrangements. 
BEST KNOWN PRIOR ART 
The best known prior art are the following U.S. Pat. Nos.: 
______________________________________ 
2,902,701 4,780,919 
3,206,771 4,805,249 
3,310,289 4,807,313 
3,678,519 4,811,435 
3,781,928 4,819,282 
3,840,909 4,821,350 
4,074,374 4,852,193 
4,205,665 4,856,128 
4,425,673 4,856,129 
4,494,259 4,856,741 
4,667,354 4,868,937 
4,763,643 4,872,226 
4,768,241 4,494,259 
______________________________________ 
OBJECTS OF THE INVENTION 
It is an object of this invention to provide an adjustable bed for a 
truck-trailer transportation system. 
Still other objects of this invention are to provide a unique and novel 
adjustable bed system for a truck that is economical to manufacture, use 
to install and which is efficient and reliable in operational use. 
To provide an adjustable bed system for a truck trailer transportation 
system which can be installed in limited space therein is another object 
of this invention. 
And to provide an adjustable bed system for a truck-trailer arrangement 
that is readily available and in proximity of the driver of the 
truck-trailer arrangement, is another object of this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION 
Referring now to FIGS. 1 to 5, of the drawings, there is shown the 
preferred embodiment of an adjustable bed or bunk arrangement 10 
installed, the limited space provided next to and in proximity with the 
driver of a truck-trailer transportation system. 
This adjustable bed arrangement 10 consists of bases 26 and 28 pivotably 
connected together by a piano pivot 30. Base 26 is fixed in position while 
base 28 is arranged to pivot upwardly as will be explained thereafter. A 
mattress M is positioned on the top of the bases 26 and 28 for a driver to 
sleep on when the base 28 is inclined to an angular position. 
Two spaced steel plate members 12 and 14 are positioned below the base 28 
for housing the mechanism for elevating the base 28. 
Two spaced roller wheels 24 are mounted by U-shaped brackets 25 on the top 
steel plate 14. Directly below each wheel 24 is mounted a cylinder 16 and 
a shaft 18 positioned in the cylinder 16 for supporting and elevating the 
vertical plate 14 above the fixed plate 12 so that the steel base 28 can 
be angularly elevated as desired. The upper ends of the shafts are welded 
to the underside of 14, all as shown in FIGS. 4 and 5. 
As shown in FIGS. 1 to 5, an air bag or air reservoir 20 is positioned 
between the two plates or bases 12 and 14. This air bag or air reservoir 
is connected by a passageway 22 to a suitable control valve 27 and a 
source of pressurized air. 
In operational use, the adjustable bed arrangement is put into operational 
use by controlling the amount of air through the air control valve 27. The 
air is used to pressurize the bag 20 which causes the upper base 14 to be 
elevated by the upper movement of the shafts 18 in their respective 
pistons 16. When this occurs, the wheels 24 roll on the back of the base 
28 to cause the base 28 to be angularly elevated to the desired height for 
a proposed user. When the adjustable bed is no longer to be used, the air 
is released through the air control valve 27. 
Obviously many modifications and variations of the present invention are 
possible in light of the above teachings. It is, therefore, to be 
understood that within the scope of the appended claims the invention may 
be practiced otherwise than as specifically described.