20
5.4
Gas Cylinders
The use of gas charged springs on BRODA products allow the caregiver to easily make
adjustments to the tilt with a minimum amount of effort. The gas cylinder contains pressurized
Nitrogen gas, it is not flammable nor is it toxic. The cylinder provides 600 Newtons (135 lbs.) of
force. The cylinder provides assistance and reduces the amount of effort required by the care
giver to tilt the chair.
How do they work?
On the end of the stem of the cylinder is a small pin. When the operator depresses the handle
this pulls on the cable which in turn pulls on a small lever inside the actuator mechanism into
which the stem of the cylinder is mounted. This depresses the pin which opens a valve located
inside the barrel of the cylinder, allowing for changes in position. When the operator releases the
handle, the valve closes and locks the cylinder in the desired position.
The function of the actuator is to push against the pin and open the valve that controls the
cylinder. If the actuator is not properly adjusted when mounted on the cylinder, problems will
occur.
Maintenance
The gas cylinders generally do not require any maintenance. Adjustments may be needed due to
cable stretch.
When adjusting the cylinder it is important that you do not damage the stem on the
cylinder. Small scratches left by applying the jaws of pliers or Vice Grips directly to the
shaft while making adjustments will destroy the seal and allow the gas inside the cylinder
to escape. Use a piece of cloth or rubber to protect the cylinder shaft from the tools you
are using to make the adjustments!
Actuator
Clevis
Cylinder Stem
