| 摘要 |
<p>The pump comprises a plate (10) fitted with a crescent for supply through it. This plate (10) is rotationally mounted on the skew-plate (6) with the aid of a cylindrical ring (26) placed in a groove (27) made in the skew-plate (6) and in a groove (28) made in the plate (10). A ratchet device made up of a ball (29) held back by a spring (31) and projecting into a groove (32) of the plate (10) locks the plate (10) in its position with respect to the skew-plate (6). With the aid of a screwdriver (33) the ball (29) can be pushed in in order to revolve the plate (10) through 180 DEG into a position in which it is locked again by the ratchet (29, 31). This displacement of the plate allows the pump to be used in the other direction of rotation as well. <IMAGE></p> |
