An integral power steering apparatus includes a stroke limiter. A piston defines
two hydraulic chambers in a housing. A communicating passage, a first valve disposed
between the first hydraulic chamber and the communicating passage, and a second
valve disposed between the second hydraulic chamber and the communicating passage,
are provided to serve for a stroke limiter, in addition to a hydraulic circuit
for supplying hydraulic fluid to the two hydraulic chambers. The two valves each
include a valve body having a bore and serving as a valve seat, a plunger slidably
fitted within the bore of the valve body and serving as a valving element, and
a spring disposed on the bottom of the bore of the valve body and biasing the plunger
to be in contact with the valve body.
