| 摘要 |
<p>A flow control apparatus for use in a servomotor to control the rate of the flow of air through a hub to a control valve. A push rod has a first section connected to the control valve and a second section through which an operator supplies an operational input signal. A truncated resilient disc holds the first and second sections of the push rod away from each other. A filter surrounds the second section and extends radially to fill the interior of the hub. A series of projections extend rearwardly from the truncated resilient disc along the exterior of the filter. When the operator desires to begin a braking sequence, an input force is applied from the operator through the second section into the truncated resilient disc to the first section to actuate the control valve. With the control valve actuated, air will flow from the atmosphere through the filter into the servomotor. As the input force increases, the truncated resilient disc will be flattened which will cause the projections to contract and compress the filter toward the second section. With the filter compressed, air will flow directly into the control valve without being restricted by the filter and thereby reduce the response time for the servomotor to be actuated by the operator.</p> |
