| 摘要 |
<p>An imperforate movable hard material plaque, intended to be displaced both diametrically and rotationally with respect to a fixed plaque having two passage openings for hot and cold water, respectively, in the flow control device of a single control mixer valve, whose shape substantially comprises a basic circle at least half of which forms the outline of the movable plaque, and at least one substantially triangular portion which protrudes towards the outside from the basic circle and whose two outer sides are both substantially tangent to the basic circle. In a preferred embodiment two such substantially triangular portions are provided, and a side of one of these portions substantially constitutes the continuation of a side of the other portion. Preferably, the sides defining the triangular portions are formed by circle arcs or by straight line segments. In a preferred embodiment, the outline of the plaque is substantially defined by a semicircle continued by two straight line segments connected to one another by a circle arc whose radius is considerably larger than the radius of said semicircle, and the maximum length of the plaque, measured between the semicircle and the circle arc, is almost equal to twice the radius of the semicircle.</p> |
