公开(公告)号：US06616427B2

公开(公告)日：2003-09-09

申请号：US10147144

申请日：2002-05-15

申请人： William B. Carnes ,  Milton K. Leonard ,  Robert B. Ray

发明人： William B. Carnes ,  Milton K. Leonard ,  Robert B. Ray

IPC分类号： F04B4504

CPC分类号： F04D9/043 ,  F04D9/046 ,  Y10T137/3099

摘要： A self-priming centrifugal pump including a supplementary vacuum pump and a float valve. The vacuum pump serves to draw liquid to the pump for priming and the float valve shut of flow to the vacuum pump when liquid reaches a predetermined level to prevent entry of liquid into the vacuum pump. In some embodiments the float valve includes an o-ring valve seal and the vacuum pump includes an oil delivery system to distribute oil from an oil reservoir to improve lubrication.

公开(公告)号：US06249198B1

公开(公告)日：2001-06-19

申请号：US09485815

申请日：2000-02-15

申请人： Richard Edward Clark ,  Stephen John Cook

发明人： Richard Edward Clark ,  Stephen John Cook

IPC分类号： F04B4504

CPC分类号： F04B43/04 ,  F04B45/047 ,  H02K1/12 ,  H02K33/00

摘要： A magnetic actuator for reciprocating motion of a compressor diaphragm, piston or the like. The actuator comprises a stator with stator poles, excitation windings, and a backing plate. Non-magnetic support arms carry arced magnet poles and actuate a pair of compressed diaphragms. With the introduction of coil current, magnet poles are attracted to the central stator poles and repulsed by outer poles. A torque about pivot results and hence movement of arms with consequential actuation of the diaphragms. Performance is improved by increasing the flux produced by the electromagnet, thereby reducing flux leakage and fringing.

摘要翻译： 用于压缩机隔膜，活塞等的往复运动的磁致动器。 致动器包括具有定子极，激励绕组和背板的定子。 非磁性支撑臂携带弧形磁极并致动一对压缩隔膜。 随着线圈电流的引入，磁极被中心定子极吸引并被外极排斥。 关于枢轴的扭矩导致臂的运动并伴随着隔膜的致动。 通过增加由电磁体产生的磁通来改善性能，从而减少磁通泄漏和边缘。