| 摘要 |
A PRESSURE RELIEF ARRANGEMENT FOR A PUMP (10) WHICH INCLUDES A PUMP HOUSING ASSEMBLY WITH A PUMPING CHAMBER (25) THEREIN, THE PUMP HOUSING ASSEMBLY INCLUDING A SECTION MOUNTED FOR MOVEMENT BETWEEN A NORMAL OPERATING POSITION AND A VENTING POSITION, A SHEARING ELEMENT (45) BEING ADAPTED TO RETAIN THE SECTION IN THE NORMAL OPERATING POSITION, THE SECTION BEING MOUNTED SO THAT PRESSURE WITHIN THE PUMPING CHAMBER (25) CAN ACT ON THE SECTION, THE ARRANGEMENT BEING SUCH THAT UPON THE PRESSURE WITHIN THE PUMPING CHAMBER (25) REACHING A SPECIFIED PRESSURE THE SHEARING ELEMENT (45) WILL FAIL THEREBY PERMITTING MOVEMENT OF THE SIDE WALL SECTION (41) FROM THE NORMAL OPERATING TO THE VENTING POSITION.
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