| 摘要 |
A rotary pump includes a housing, rotors, an inlet chamber, an outlet chamber and pressure relief means. The pressure relief means includes a movable wall normally resiliently biased into engagement with one of said rotors and exposed to fluid pressure at said outlet chamber. At a predetermined maximum pressure, the fluid pressure force acting upon the wall will overcome the resilient bias and move the wall away from said rotors to a degree sufficient to interconnect said outlet and said inlet chambers in fluid communication and allow fluid to flow therebetween and thereby disrupt the pumping action of the rotors. The movable wall pressure relief contacts only one of the rotors.
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