Appeal No. 2003-0677 Page 10
Application No. 09/759,950
truck bed is then placed upon platform 28 and hydraulic motors 42 of the assembly are
actuated to causing the linkage to rotate upwardly from the position shown in Figure 1
until the forward edge of platform 28 is in abutting relationship with the rearward edge
of extension plate 46, as shown in broken line in Figure 3. The load is then transferred
from platform 28 into the interior of the truck bed. When the platform 28 moves into
abutting relationship with the rearward edge of extension plate 46, the pins 48 on the
platform are received within the slots 52 in plate 46 to prevent further upward
movement of the platform and to prevent the platform against transverse sway relative
to the extension plate. By reversing the foregoing procedure, a load can be lowered
from the truck bed to ground level.
To place Mortenson's assembly in its stored position, the apparatus is first put in
the position shown in Figure 1, see also Figure 4. Extension plate 28a is manually
folded to the broken line position of Figure 3 and rearward edge of platform 28 is then
manually grasped and elevated to the position shown in Figure 5. With parts in the
position shown in Figure 5, to place the device in its stored position, motors 42 are
actuated to collapse or fold platform 28. In Figure 6, the device is shown as it is
approaching its stored position. Further extension of motor 42 will drive the assembly
into its stored position with pin 48 seated in latch member 74 as shown in Figures 3 and
7.
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Last modified: November 3, 2007