公开(公告)号：EP0278739A1

公开(公告)日：1988-08-17

申请号：EP88301096.9

申请日：1988-02-10

Applicant: MILTON ROY COMPANY

Inventor： Hiscock, Benjamin

IPC: G01N30/36 ,  F04B49/00

CPC classification number: F04B11/0066 ,  F04B1/12

Abstract: Two pumping chambers operating in parallel flow channels are operated by pump pistons driven by cam followers 12 and 12ª which are reciprocated by rotation of cam 11 by shaft 13. The cam track has three 120° sectors 11aʹ + 11aʺ; 11bʹ + 11bʺ and 11cʹ + 11cʺ each consisting of a rising section 11aʹ which provides the delivery stroke of each of the pump pistons in turn and a falling section 11aʺ which provides the fill or suction stroke and is longer in the proportion of 65°/55°. Suction is thus maintained by one or other of the pump pistons throughout the operation of the pump.

Abstract translation: 在平行的流动通道中工作的两个泵送室通过由凸轮从动件12和12a驱动的泵活塞来操作，凸轮从动件12和12a通过轴13通过凸轮11的旋转而往复运动。凸轮轨道具有三个120度的扇区11a'+ 11a“ 11b'+ 11b“和11c'+ 11c”，每个由提供每个泵活塞的输送冲程的上升部分11a'和提供填充或吸入冲程的下降部分11a“组成，并且是 较长的比例为65°/ 55°。 因此，在整个泵的运行过程中，一个或多个泵活塞都能进行抽吸。