| 摘要 |
<p>PURPOSE: To deliver fluids of different volume according to the demand from a specific proper braking device by providing an elastomer piston ring having a longitudinal extension section which can be contained in the central pumping bore of a piston cap. CONSTITUTION: Radial piston means 92 and 100 arranged in piston cavities 93 and 93' are provided communicatedly with the central pumping bore of a rotor 30 containing a distribution shaft 40 and also includes a ring-shaped piston cap 95 having a central pumping bore 96 on a radial side, and a piston seal ring 98. This piston seal ring 98 seals the area of the cavities 93 and 93' positioned within the radial direction of the piston cap 95. The rotation of the rotor 30 reciprocates the piston means 92 and 100 varying the volume of the piston cavities 93 and 93', as a result, the fluid drawn out through intake ports 41 and 43 is exhausted through exhaust ports 42 and 44 after being increased in pressure.</p> |
