The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 2023
Filed:
Aug. 02, 2019
Applicant:
Fruvac Ltd., Stoney Creek, CA;
Inventors:
Khurram Akhtar, Mississauga, CA;
Christopher White, Hamilton, CA;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
F04C 18/06 (2006.01); F04C 18/16 (2006.01); F04C 29/00 (2006.01); F04C 29/04 (2006.01); F04C 25/02 (2006.01); F04C 28/24 (2006.01);
U.S. Cl.
CPC ...
F04C 18/16 (2013.01); F04C 25/02 (2013.01); F04C 28/24 (2013.01); F04C 29/042 (2013.01); F04C 2220/12 (2013.01); F04C 2240/20 (2013.01); F04C 2240/30 (2013.01);
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.