| 摘要 |
The discharge valve comprises a casing communicating with a cuff to be placed around the arm and with the manometer (1), casing which, in its portion intended to form the seat (25) of the air outlet, is covered with a washer (2) of elastic material. The washer (2) is provided on its outer part with an annular control element (3) which allows its lifting from the seat (25). The face of the washer (2) opposite to the seat (25) is supported by a plane surface (16) having the shape of a circular crown of which the diameter is at least almost equal to that of the circle defined by the support line of the casing on the side of the washer facing the air outlet (25), the air outlet (25) having a diameter (respectively a distance) smaller than the diameter of the circle defined by the support line, the washer (2) having a diameter larger than the diameter of the support plane surface (16). Therefore a valve spring is not required.
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