‘Free Lock’ is a gripping system to be fitted
to a prosthesis or orthosis by which users
with limited arm- or hand function can ride
a bike or motorcycle.
The workings of the Free Lock-system
The Free Lock-system is a mechanism which is
designed in such a way that it locks itself to the
handlebar during accelerating and decelerating
a (motor)cycle. In case of a collision, a crash or
unexpected forces higher than pre-set, the
system will unlock.
Attaching to the handlebar
The Free Lock-system was developed to give
you a safe grip to a handlebar while still
providing you with enough range of motion.
Once attached to the handlebar, you can move
freely and safely with a range of 20° in all
directions. You need this range of motion to be
able to ride a (motor)cycle. Outside this range of
20° the system will unlock and disconnect from
the handlebar.
To guarantee the range of motion in all
directions, the neutral position of the Free Lock
relative to the handlebar has to have an angle
of 90°. Please keep in mind that the angle of the
handlebar itself may vary on different
(motor)cycles. In some situations the handlebar
or the orthopedic device itself needs to be
adapted to obtain an optimal neutral setup of
90°. Furthermore, the Free Lock may only be
used with the supplied handle.
Setting the adjustment screw
A Free Lock comes with a preset release power
to unlock the system which is specifically tuned
for your specific use. By the time you get more
experienced in using the Free Lock, it is possible
to adjust the basic setting according to your
personal liking. Depending on the surface,
speed and other personal preferences, you can
vary the release power of the hook.
With the adjustment screw, which is located on
the back side of the Free Lock, you can adjust
the release power of the hook to tighten or
loosen the grip on the handle. By turning the
screw clockwise it will tighten the system and
require more force to release the hook from the
handle. When you turn it counterclockwise it
will release easier.
Attention - Only set the adjustment screw a
quarter at a time and see if the desired effect is
reached.
At all times make sure that the grip on the
handlebar remains safe. A setup that is too
loose might result in unintentional loss of grip
on the handlebar. If the setup is too tight it
might not release when needed.
Ÿ
the axle of the hook should not come out of
its housing
Ÿ
the hook has to move smoothly and should
not be bent sideways
Ÿ
the adjustment screw must be set to your
basic setup (Check this before you make
further adjustments)
At least check the following points:
To reset the Free Lock to the basic setup, you
can use the supplied reference key. Put the
reference key between the adjustment screw
and the base of the Free Lock and turn the
adjustment screw until it fits best between the
screw and the base. Now remove the key and
put both markers on the screw and the base
exactly in line.
Ÿ
there should be no loose parts on the Free
Lock-system
Check each time before use
Before each use, you need to check the Free
Lock and your entire orthopedic device for any
defects.
Apply downward pressure to the Free Lock to
lock it and you should feel a clear resistance
when you try to lift the Free Lock from the
handlebar.
A device which is being used for riding a bike or
motorcycle will always transfer vibrations from
the surface you ride on. It is possible that
vibrations can amplify pain, depending on the
condition you use the device for.
Adaptation period and pain
In case the device gets in contact with salt (i.e.
sea water or perspiration) and or fine sand, you
need to pay extra attention to rinsing and
cleaning, because of corrosion and wear.
You should lubricate the hinged parts with a
teflon- or silicone spray on a regular base.
Everyday use
The Free Lock-system is a relatively low-
maintenance mechanical gripping system. To
guarantee proper functionality, the system
needs to be serviced by a qualified technician at
least once every year.
Overall functioning, safety and condition of
several parts will be checked and parts will be
replaced when needed.
In general you will be able to ride without
problems after a period of adaptation. When in
doubt, you should contact your therapist for
consultation.
Make sure that the hook of the Free Lock is
properly and securely locked around the handle
before you start riding your bike or motorcycle.
Ÿ
there should be no sharp or damaged edges
on the Free Lock-system
Attention - In case your device does not meet
the aforementioned requirements, please have it
checked by your orthopedic technician before
further use.
Maintenance after every use
Scheduled maintenance
If your device gets wet or dirty during your
activity, you can clean it with a damp cloth, a
soft brush or rinse it with water and dry well
afterwards.
90°
90°
