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2.2.2.3
The Knee Block (Figs. 9 & 10).
The knee block provides support for the lower body, applying pressure to the upper shin as the
wheelchair mechanisms work in concert to raise the body to the standing position. It is not
possible to stand up without a properly positioned knee block
To mount the knee block, follow the instructions below:
Fig. 9: Pulling from the top, rotate the knee block pivot mount forward from the retracted
position to the extended position until is locks in place
Fig. 10: With the pads facing down, hook the left and right locking flanges on the outside
of the knee block (from below, then moving up) to the knee block pivot mount pegs.
Move them up into place, then rotate the knee block toward the seat and in position.
WARNING: It is not possible to stand up in this device without a knee block that is properly
positioned and fixed in place. Attempting to do so is dangerous and could result in injury.
2.2.2.4
Safety Locks (Fig. 11)
There are two Safety Locks (right and left) which are located between the upper and the lower
seat rails.
important that these locks be engaged at all times except for when preparing to stand.
The Safety Locks engage and disengage by sliding them rearward or forward along the Seat
Rail – Lower. It is best to push and pull with your thumb and forefinger.
In preparation for standing, after all the standing preparations have been made, it is now
appropriate to push the Safety Locks forward. They will disengage and allow the stand up
mechanism to operate.
2.2.2.5
Mechanical Movement to Standing (Fig. 12)
After completing the above, you are now prepared to stand. It is best that an attendant
read the following instructions to the occupant seated in the chair.
-
Engage the Safety Locks as described in 2.2.2.4 above.
-
Disengage the Wheel Locks as described in 2.1.8
-
Mount the Knee Block as described in 2.2.2.3 above.
-
Grasp the right and left Arm Loops Levers by: 1) Positioning the thumbs and the base of
the thumb on the top of the tube, the thumb extending forward; 2) Locating the base thumb
knuckle approximately even with the backrest tube; 3) Wrapping the fingers around and
under the bottom of the tube.
-
Pull up - you will feel the Arm Loop lever release from its lock position and begin to rotate.
As this happens, the seat will begin its upward travel.
-
Continue to rotate the lever up and forward utilizing an arm motion similar to that of
propelling a wheelchair wheel. The seating mechanism will rise to achieve the full standing
position as the lever continues to rotate and actually begins to travel downward.
-
Helium User's Manual March 2010
They can prevent the involuntary actuation of the standing mechanism.
It is
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