| 摘要 |
<p>The piston (b) divides the pump housing into fore (8) and aft chambers which are in communication (10, 11) with the corresponding chambers (12, 13) of a secondary or output pump (a). The piston rod (14) of the output pump is pinned (15) to an output lever (16) with a fixed fulcrum (17). Cam revolution, causes reciprocal vertical movements of rod (71). The descent of the primary piston causes the secondary piston to rise and vice versa. The dia. of the primary piston is four or five times that of the secondary, this ratio governing the extent of secondary piston travel.</p> |
