Lubricating oil analysis method and kit

• US 5,313,824 A
• Filed: 09/30/1992
• Issued: 05/24/1994
• Est. Priority Date: 09/30/1992
• Status: Expired due to Term

• Current Assignee: Herguth Laboratories Incorporated (SGS SA)
• Original Assignee: Herguth Laboratories Incorporated (SGS SA)
• Inventors: Herguth, William R., Yates, Peter
• Primary Examiner(s): Williams, Hezron E.
• Assistant Examiner(s): ROSKOS, JOSEPH
• Application Number:
  US07/954,116
• Time in Patent Office: 601 Days
• Field of Search: 73/53.05, 73/53.07
• US Class Current: 73/53.05
• CPC Class Codes: G01N 33/2888 Lubricating oil characteristics, e.g. deterioration lubricating properties G01N33/30

Abstract

An apparatus for analyzing lubricating oil is disclosed in the form of a test medium upon which an oil sample is placed, and comparative visual indicia which the user consults to provide a qualitative analysis of the oil sample. A method for the use of the apparatus is also disclosed.

Claims

1. A test kit for the analysis of lubricating oil, comprising:

a test medium capable of absorbing the oil;

a plurality of comparative visual indicia depicting at least two different conditions of lubricating oil disposed upon said test medium; and

a descriptive text corresponding to said comparative visual indicia.

2. A test kit as recited in claim 1, wherein said test medium is composed of paper of a porosity and density to provide rapid dispersion of the lubricating oil.

3. A test kit as recited in claim 1, wherein said comparative visual indicia are selected from the group consisting of photographs and artistic renditions of used lubricating oil in various conditions.

4. A test kit as recited in claim 3, wherein said visual indicia comprise:

a depiction of lubricating oil in acceptable condition, disposed upon said test medium; and

a depiction of lubricating oil in unacceptable condition, disposed upon said test medium.

5. A test kit as recited in claim 3, wherein said visual indicia comprise depictions of lubricating oil dispersed on the test medium for specific lengths of time.

6. The test kit of claim 1, wherein each of the visual indicia depicts an inner, darker area of sludge and an outer, lighter area of oil.

7. The test kit of claim 1, wherein the test medium is discrete from the plurality of comparative visual indicia.

8. A method for analysis of lubricating oil, comprising the steps of:

obtaining a sample of said lubricating oil;

disposing said sample upon a test medium capable of absorbing said lubricating oil;

maintaining said test medium in a selected position for an effective time to develop a spot on said test medium;

visually comparing said spotted test medium against a plurality of comparative visual indicia depicting lubricating oil in at least two different conditions; and

,

selecting one of the plurality of comparative indicia which most closely resembles said spotted test medium.

9. A method as recited in claim 8, wherein said test medium is composed of paper of a porosity and density to provide rapid dispersion of the lubricating oil.

10. A method as recited in claim 8, wherein said comparative visual indicia are selected from the group consisting of photographs and artistic renditions of used lubricating oil.

11. A method as recited in claim 10, wherein said visual indicia comprise:

a depiction of lubricating oil in acceptable condition, disposed upon said test medium; and

a depiction of lubricating oil in unacceptable condition, disposed upon said test medium.

12. A test kit for the analysis of lubricating oil, comprising:

a test medium capable of absorbing the oil;

a first visual indicium depicting lubricating oil in acceptable condition;

a second visual indicium depicting lubricating oil at the limit of useful life, indicating an oil change is due;

a third visual indicium depicting lubricating oil in a condition indicating an oil change is overdue; and

descriptive means corresponding to the first, second, and third visual indicia for informing a user of the particular condition of the lubricating oil.