| 摘要 |
<p>PURPOSE:To reduce the number of part items of a hydraulic pump and to improve the machinability of the pump by enclosing a hard piston directly in a soft piston-storage hole. CONSTITUTION:A storage hole 11 is formed in a housing 10 and a piston 20 is enclosed in the storage hold 11 via elastic sealing members 23, 24 for sealing the space between a pump chamber and a suction line at the outer periphery of the piston 20 and the space between the suction line and a storage chamber 17.</p> |
