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Publication numberUS2419144 A
Publication typeGrant
Publication dateApr 15, 1947
Filing dateDec 18, 1944
Priority dateDec 18, 1944
Publication numberUS 2419144 A, US 2419144A, US-A-2419144, US2419144 A, US2419144A
InventorsJohn P Kelly
Original AssigneeChampion Spark Plug Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Antiseize and sealing compound
US 2419144 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Patented Apr. 15, 1947 UNITED STATES PATENT OFFICE ANTISEIZE AND SEALlNG COMPOUND John P. Kelly, Toledo, Ohio, assignor to Champion Spark Plug Company, Toledo, Ohio, a corporation of Delaware No Drawing. Application December 18,, 1944, Serial No. 568,788

This invention relates to a compound for use between close fitting metal surfaces to effect a gas tight sealing of the joint therebetween and which internal engines in which mounted.

In the use of aviation engines, considerable difiiculty is encountered by reason of the sealing or. lubricating compounds, commonly used between the cylinder head and spark plug threads, becoming thinned and thus releasing and flowing from the threads under the high temperature conditions to which subjected. This thinning action not only destroys or lessens the joint sealing characteristics of the compound but permits the contacting metal surfaces to seize and prevent relative movements of the surfaces without injury thereto. 7

The primary object of the invention is the provision of a new and useful compound of the character described, particularly adapted for use in high temperatures between threaded surfaces to prevent seizing of the surfaces so that a comparatively easy separation or relative moving of the surfaces may be effected without injury thereto, and also being of a character to prevent thinning and flowing of the lubricant or sealing agent from between the surfaces under high temperature conditions.

Other objects and advantages thereof will be apparent from the following detailed description of the invention.

A compound embodying the invention that has given highly efficient results in connection with spark plugs used in connection with the mounting of spark plugs in aviation engines comprises the following ingredients mixed in substantially the proportions noted:

Per cent Aviation lubricating oil 38 Stearate (lithium or barium) 12 Talc (magnesium silicate) 21 Graphite (preferably flake) 23 Corrosive preventive concentrate 6 The oil component is preferably a refined oil 3 Claims. (Cl. 252-23)- 2: having the following specifications: gravity, A. P. I, 215*; flash point, 495 F; to- 500 F; Saybolt v viscosity 9'? to 102 seconds at 210 F.; viscosity index, 104. Oil-s having substantially these constantshave been found satisfactory in the present composition.

The corrosive preventive concentrate may be made from the following specifications:

Parts (a) Petroleum lubricating oil of Saybolt viscosity 750 seconds at 109 F (b) 7 Oil solution of sodium salts of oil soluble sulphonic acids, formed on treating petroleumoils with concentrated sulphuric acid (c) Degras (a fatty oil that has been extracted from sheep wool, and neutralized with calcium oxide) 5 This ingredient may be omitted in compounds used on surfaces that will not corrode.

The lithium or barium stcarate is used in powder form and is preferably of a fineness to pass through a U. S. standard 140 mesh sieve. The lithium stearate which has been used with good results in the composition has a melting point of 215 to 221 C.

The tale or magnesium silicate is used in powder form and is preferably white and of a fineness to pass through a U. S. standard 325 mesh sieve and should be free of gritty matter.

The graphite, which is preferably flaked, should be free of gritty matter and in the finished compound be preferably of a fineness to pass through a U. S. standard -170 mesh sieve.

It is found in practice that while the preferred compound is mixed in the proportions abovenoted, any of these may be varied within the following limits:

Per cent Aviation lubricating oil 34-44 Stearate (lithium or barium) 9-15 Talc (magnesium silicate) 17-25 Graphite 19-27 Corrosive preventive concentrate 0-10 In preparing the mixture in small quantities, the following procedure has been followed: The oil compound and the corrosive preventive concentra-te are first mixed together and during slow mixing of these the stearate is added and the mixing continued long enough to completely disperse the stearate in the mix. The slow mixing eliminates throwing-out of the stearate. The talc and graphite ingredients are added while 3 the oil, corrosive preventive concentrate and the stearate are being stirred and the stirring should continue until a smooth homogeneous mass is obtained. Thorough mixing is essential. The ingredients should be in a cold or unheated state while mixing.

An important advantage of this compound'is that the ingredients will remain in suspension for a much longer time than other compounds for similar purposes, of which I am aware. Further, the compound, due to a jelling action under high temperatures, does not flow as freely as other compounds for the purpose and, therefore, effects a more efiicient seal and also has a greater tendency to cling and remain on the threads or other surfaces to which applied.

The oil, stearate, graphite and talc eachhas a particular lubricating quality, and when these ingredients are combined they have such a cooperative action as to form a highly efiicient seal ,and an anti-seize for threaded connections of metal parts, such for instance as spark plugs in aviation engines, subject to use under'high tem- .perature conditions, and wherein it may be desirable to disconnect the parts after. use for inspection or replacement.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent, is:

1. A composition of matter for use between metal joint surfaces to prevent seizing of the metal joint surfaces to prevent seizing of the surfaces comprising 34 to 44% petroleum lubricating oil, 9 to lithium stearate, 11 to 25% talc, and 19 to 27% flaked graphite.

3. A composition of matter for use between metal joint surfaces to prevent seizing of the surfaces comprising 34 to'44% aviationjlubricating on; 9' to 15% lithium stearate, '17 to 25% talc, and 19 to 27% flaked graphite thoroughly mixed, the stearate being capable of passing through a substantially 140 mesh sieve, the tale being capable of passing through a substantially 325 mesh sieve and the graphite in the finished surfaces after heating and cooling cycles .com-

compound being capable of passing through a -170 mesh sieve. JOHN P. KELLY.

REFERENCES CITED The following references are of record in the file of this patent:

-' UNITED STATES PA'I'ENTS OTHER REFERENCES Klemgard (Lubricating Greases), 1937. in Div. 64, page 722.)


Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US278067 *Feb 20, 1883May 22, 1883 John w
US1982199 *Jan 11, 1932Nov 27, 1934Standard Oil CoLubricant
US2102214 *Nov 6, 1934Dec 14, 1937Arthur L ParkerArt of preventing seizure of contacting surfaces of soft alloys and like materials
US2173003 *Jan 21, 1937Sep 12, 1939Clare L BrackettMethod of inhibiting thread surface seizure
US2206025 *Oct 11, 1937Jul 2, 1940Carsolac CorpCarbon solvent and lubricant
US2245702 *Nov 24, 1937Jun 17, 1941Standard Oil Dev CoGrease composition
US2262689 *Dec 4, 1937Nov 11, 1941Goodrich Co B FAdhesion-preventing material
US2345198 *Aug 12, 1941Mar 28, 1944Hodson CorpForging compound
US2351384 *Nov 18, 1942Jun 13, 1944Shell DevLithium soap grease
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3993494 *Oct 25, 1974Nov 23, 1976Ab Wet TalcPowdered material parting agent
US5093015 *Jun 11, 1990Mar 3, 1992Jet-Lube, Inc.Thread sealant and anti-seize compound
US5180509 *Apr 9, 1991Jan 19, 1993Jacobs Norman LMetal-free lubricant composition containing graphite for use in threaded connections
US5286393 *Apr 15, 1992Feb 15, 1994Jet-Lube, Inc.Coating and bonding composition
US5348668 *Nov 23, 1993Sep 20, 1994Jet-Lube, Inc.Coating and bonding composition
US5536422 *May 1, 1995Jul 16, 1996Jet-Lube, Inc.Anti-seize thread compound
US5547503 *Nov 23, 1993Aug 20, 1996Oldiges; Donald A.Coating and bonding composition
US6620460May 31, 2002Sep 16, 2003Jet-Lube, Inc.Methods for using environmentally friendly anti-seize/lubricating systems
US6933264Aug 9, 2001Aug 23, 2005Vallourec Mannesmann Oil & Gas FranceThreaded component for seizure-resistant tubular threaded joint
US20050215105 *Mar 16, 2005Sep 29, 2005Aisin Seiki Kabushiki KaishaFitting member and manufacturing method thereof
WO2002018522A1 *Aug 9, 2001Mar 7, 2002Vallourec Mannesmann Oil & GasThreaded component for seizure-resistant tubular threaded joint
U.S. Classification508/121, 106/243
International ClassificationC09K3/10
Cooperative ClassificationC10M2201/102, C10M2201/041, C10M2205/18, C10M2201/042, C10N2250/10, C10M5/00, C10M2207/129, C10N2210/01, C10N2210/02, C10M2219/044, C10N2230/12, C10M2207/125
European ClassificationC10M5/00