公开(公告)号：US07470117B2

公开(公告)日：2008-12-30

申请号：US10998624

申请日：2004-11-30

申请人： Scott F. Shafer ,  Brad E. Bartley ,  Kevin Charles Reynolds ,  Gregory W. Hefler

发明人： Scott F. Shafer ,  Brad E. Bartley ,  Kevin Charles Reynolds ,  Gregory W. Hefler

IPC分类号： F04B23/04 ,  F04B41/06

CPC分类号： F02M59/365 ,  F02M59/366 ,  F04B49/24

摘要： A pump has a housing defining a first pumping chamber and a second pumping chamber. The pump also has a first plunger and a second plunger. The pump additionally has at least one driver operatively engaged with at least one of the first and second plungers to move the at least one of the first and second plungers between first and second end positions. The pump further has a common spill passageway fluidly connectable to the first and second pumping chambers and a selector valve disposed between the common spill passageway and the first and second pumping chambers. The selector valve has a body and a ball valve member operably disposed within the body. The ball valve member is movable between a first and a second ball valve member position to selectively fluidly connect the first and second pumping chambers to the common spill passageway.

摘要翻译： 泵具有限定第一泵送室和第二泵送室的壳体。 泵还具有第一柱塞和第二柱塞。 泵还具有至少一个驱动器，其与第一和第二柱塞中的至少一个可操作地接合，以使第一和第二柱塞中的至少一个在第一和第二端部位置之间移动。 泵还具有可流体连接到第一和第二泵送室的公共溢流通道和设置在公共溢流通道与第一和第二泵送室之间的选择阀。 选择阀具有主体和可操作地设置在主体内的球阀构件。 球阀构件可在第一和第二球阀构件位置之间移动，以选择性地将第一和第二泵送室连接到公共溢流通道。