公开(公告)号：US11506207B1

公开(公告)日：2022-11-22

申请号：US17827267

申请日：2022-05-27

申请人： Gregory S. Sundheim

发明人： Gregory S. Sundheim ,  Thomas C. Shoemaker ,  Brett W. Renck

IPC分类号： F04C29/02 ,  F04C25/02 ,  F04C28/24 ,  F04C28/06 ,  F04C18/344

摘要： A portable vacuum pump with a lubricating oil system having a quick oil change system. The oil change system includes at least two containers of oil and a switch mechanism operable to initially place the first container in fluid communication with the vacuum pump to serve as the primary oil reservoir while isolating the second container from such fluid communication. Then in a snap action, the switch mechanism can be flipped to place the second container with clean oil in fluid communication with the vacuum pump to serve as the primary oil reservoir and isolate the first container from fluid communication when its oil becomes dirty, all while the vacuum pump is still operating to evacuate an AC/R system. The first container can then be removed, refilled with clean oil, and returned in place and the switch mechanism flipped back to it when the second container of oil becomes dirty.