Oil sampling device
OwnerGerald K. Johnsoninventor
Life of this patent
Estimating the term…
Abstract
A device for conveniently sampling and testing oil from the crankcase of an internal combustion engine comprises a tubular member, installed in the dipstick guide tube of the internal combustion engine and having a chamber above the guide tube inlet, and a vacuum filled sample receptacle having a seal which, when the receptacle is inserted in the chamber, is opened causing oil from the crankcase to be drawn into the receptacle. When the receptacle is withdrawn from the chamber the seal automatically closes, providing a convenient container for the oil sample to be sent to a laboratory for analysis. Optionally, to test the oil for acidity at the time the sample is received in the receptacle, the receptacle may contain a reagent which will indicate by color the pH of the oil sample.
Claims11
An oil sampling device adapted for insertion through a tubular guide into the crankcase of an internal combustion engine to remove an oil sample from said crankcase, comprising:
- (a) an elongated hollow tube having opposite first and seconds end sand a passageway connecting said first and second ends, said hollow tube being adapted to be inserted through a tubular guide in an internal combustion engine with said first end immersed in oil in the crankcase of said engine;
- (b) means defining a chamber having a lower end, said walls and an open end, said lower end being connected to said second end of said hollow tube such that said passageway of said tube communicates with said chamber;
- (c) valve actuating means in said chamber;
- and
- (d) means defining a closed, vacuum filled sample receptacle for insertion into and withdrawal from said chamber through said open end thereof, said sample receptacle comprising valve means arranged to be automatically opened by said valve actuating means when said sample receptacle is inserted in said chamber to connect said passageway in said tube with said sample receptacle and to be automatically closed when said sample receptacle is withdrawn from said chamber;
- whereby a sample of oil may be drawn by vacuum from said crankcase of said engine, when said vacuum filled sample receptacle is inserted in said chamber and said first end of said hollow tube is immersed in said oil, through said passageway in said tube and into said sample receptacle.
Dependencies are inferred from the claim text.