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:
Sep. 25, 1990
Filed:
Aug. 30, 1989
Applicant:
Inventor:
Mark S Thompson, Redwood City, CA (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
62129 ; 62 77 ; 62292 ; 7386141 ;
Abstract
Device and method for detecting the presence of gas in refrigeration systems and other evacuated systems. The exhaust from a vacuum pump connected to the system is passed through a gas detector having a reservoir of liquid in which bubbling can be observed. The exhaust is normally discharged through a discharge opening in the detector. The opening is blocked with the hand to divert the exhaust from the vacuum pump into the liquid to produce bubbling in the liquid in the event that any gas is present in the exhaust.