公开(公告)号：US11708832B2

公开(公告)日：2023-07-25

申请号：US17622041

申请日：2019-08-02

Applicant: FRUVAC LTD.

Inventor： Khurram Akhtar ,  Christopher White

IPC: F04C18/06 ,  F04C18/16 ,  F04C29/00 ,  F04C29/04 ,  F04C25/02 ,  F04C28/24

CPC classification number: F04C18/16 ,  F04C25/02 ,  F04C28/24 ,  F04C29/042 ,  F04C2220/12 ,  F04C2240/20 ,  F04C2240/30

Abstract: The present invention relates to rotary screw positive displacement machines used as a vacuum pump wherein additional intake air is provided allowing cooling to the invention which permits extended operation at extreme vacuum pressure. The rotary screw nature of the vacuum pump allows operation without additional lubrication with the additional intake air ensuring that thermal expansion will not disrupt the tight tolerances of the invention. The invention allows simultaneous operation as a vacuum pump and air compressor.

公开(公告)号：US20220268279A1

公开(公告)日：2022-08-25

申请号：US17622041

申请日：2019-08-02

Applicant: FRUVAC LTD.

Inventor： Khurram Akhtar ,  Christopher White

IPC: F04C18/16 ,  F04C29/04 ,  F04C25/02 ,  F04C28/24

Abstract: The present invention relates to rotary screw positive displacement machines used as a vacuum pump wherein additional intake air is provided allowing cooling to the invention which permits extended operation at extreme vacuum pressure. The rotary screw nature of the vacuum pump allows operation without additional lubrication with the additional intake air ensuring that thermal expansion will not disrupt the tight tolerances of the invention. The invention allows simultaneous operation as a vacuum pump and air compressor.