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:
Nov. 17, 2020
Filed:
Jul. 27, 2018
Applicant:
Fieldpiece Instruments, Inc., Orange, CA (US);
Inventor:
Tinggui Hong, Orange, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04C 28/24 (2006.01); F04C 29/02 (2006.01); F04C 18/344 (2006.01); F25B 45/00 (2006.01);
U.S. Cl.
CPC ...
F04C 28/24 (2013.01); F04C 29/026 (2013.01); F04C 18/344 (2013.01); F04C 2220/10 (2013.01); F05B 2260/95 (2013.01); F25B 45/00 (2013.01);
Abstract
A vacuum pump system includes an air-cooled, O-ring sealed vacuum pump and an oil management system with an LED illuminated clear tank for observation of the oil condition as well as a large oil inlet and outlet for rapid and safe oil changes while the pump is operating. The oil management system is also configured to prevent oil from the sump from being drawn into an evacuated AC/R system when the pump is stopped and the intake ports are not sealed from the high vacuum AC/R system. The oil management system includes a preferential vacuum relief system that allows air instead of the oil from the sump to be drawn back into the evacuated lines.