US4324758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analysis of lubricating oils for iron content
Assignee: United States Department of the Air Force
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Filing: 1980-04-18
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Granted: 1982-04-13
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Expires: 2000-04-18
Abstract
Abstract An apparatus for analyzing a used lubricating oil for iron wear metal content which comprises a series of containers, at least one of which is adapted for holding a test sample material while the remaining containers are adapted for holding 3 separate reagent sample materials. Also included are a reaction chamber, means for transferring the test sample material and the reagent materials from the series of containers to the reaction chamber which may also function as a test cell.
Inventors
- 👤 Kent J. Eisentraut
- 👤 William D. Ross
- 👤 William J. Hillan
- 👤 Joseph J. Brooks
- 👤 Thomas G. Duffy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:36
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/26; G01N33/28; G01N33/2835; G01N33/2858
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
132 words
Apparatus for use in determining the amount of iron present in a used lubricating oil which comprises a reaction chamber having upper and lower ends; a closure member formed of a rubbery material adapted to close the lower end of the reaction chamber; a solid body member non-rotatably attached to the upper end of the reaction chamber, the said body member having a plurality of cavities formed therein with each of the cavities having a lower opening therein communicating the cavity with the reaction chamber; a rotatable top member having an opening therein positioned on the body member and rotatable relative thereto; and means for sequentially positioning an opening in the rotatable top member so that it is in vertical alignment with one of said plurality of cavities in the body member.
Claim 2
Dependent Claim
132 words
Apparatus for use in determining the amount of iron present in a used lubricating oil which comprises a reaction chamber having upper and lower ends; a closure member formed of a rubbery material adapted to close the lower end of the reaction chamber; a solid body member non-rotatably attached to the upper end of the reaction chamber, the said body member having a plurality of cavities formed therein with each of the cavities having a lower opening therein communicating the cavity with the reaction chamber; a rotatable top member having an opening therein positioned on the body member and rotatable relative thereto; and means for sequentially positioning an opening in the rotatable top member so that it is in vertical alignment with one of said plurality of cavities in the body member.
Claim 3
Dependent Claim
134 words
The apparatus according to claim 1 in which the reaction chamber and body member are cylindrical in shape and the body member has six equally spaced cavities formed therein adjacent to its periphery; the rotatable top member is circular in shape with two openings therein and a shaft is centrally attached to its underside and extends through an opening in the body member to a point below the underside of the body member; the positioning means comprises a ratchet wheel having six teeth attached to the lower end of the shaft and a pawl attached to the underside of the body member so that it cooperates with the teeth of the ratchet wheel; and a spring loaded plunger is positioned with its piston end located in one of the openings in the top member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |