<s>
A	O
rigid	B-Algorithm
belt	I-Algorithm
actuator	I-Algorithm
,	O
also	O
known	O
as	O
a	O
push-pull	O
belt	O
actuator	O
or	O
zipper	B-Application
belt	O
actuator	O
,	O
is	O
a	O
specialized	O
mechanical	O
linear	B-Algorithm
actuator	I-Algorithm
used	O
in	O
push-pull	O
and	O
lift	O
applications	O
.	O
</s>
<s>
Rigid	B-Algorithm
belt	I-Algorithm
actuators	I-Algorithm
can	O
move	O
dynamic	O
loads	O
up	O
to	O
approximately	O
230	O
pounds	O
over	O
about	O
3	O
feet	O
of	O
travel	O
.	O
</s>
<s>
Rigid	B-Algorithm
belt	I-Algorithm
actuators	I-Algorithm
can	O
be	O
thought	O
of	O
as	O
rack	O
and	O
pinion	O
devices	O
that	O
use	O
a	O
flexible	O
rack	O
.	O
</s>
<s>
Rigid	B-Algorithm
belt	I-Algorithm
actuators	I-Algorithm
use	O
two	O
reinforced	O
plastic	O
ribbed	O
belts	O
,	O
that	O
engage	O
with	O
pinions	O
mounted	O
on	O
drive	O
shafts	O
within	O
a	O
housing	O
.	O
</s>
<s>
As	O
the	O
pinions	O
spin	O
,	O
the	O
belts	O
are	O
rotated	O
90	O
degrees	O
through	O
the	O
housing	O
,	O
which	O
interlocks	O
the	O
blocks	O
like	O
a	O
zipper	B-Application
into	O
a	O
rigid	O
linear	O
form	O
.	O
</s>
<s>
A	O
rigid	B-Algorithm
belt	I-Algorithm
actuator	I-Algorithm
is	O
effectively	O
a	O
non-metallic	O
variation	O
of	O
the	O
rigid	B-Algorithm
chain	I-Algorithm
actuator	I-Algorithm
.	O
</s>
