Showing papers on "Grease published in 1972"

Elastohydrodynamic Lubrication With Herschel-Bulkley Model Greases

Abstract: The analysis of grease-lubricated rolling element bearings is presented. Experimentally determined flow curves for grease are found to be well correlated by the Herschel-Bulkley model flow equation. A theory for predicting roller film thickness based on the assumed flow model is derived. Experimental results show that grease will develop a larger film thickness than the grease base oil at first, but the film thickness falls during rolling until it reaches a steady thickness usually lower than that of its base oil. This effect is shown to depend on the degree of shear degradation of the grease, its resulting flow curve, and the temperature rise due to shear in the inlet. The grease yield stress is found to have a negligible effect on EHL performance. Presented at the 27th ASLE Annual Meeting in Houston, Texas, May 1–4, 1972

An Experimental Study of Grease in Elastohydrodynamic Lubrication

Abstract: The formation of a lubricating film by grease in conditions pertinent to elastohydrodynamic lubrication is studied in a disk machine, and the thickness measured by means of a magnetic reluctance technique. The greases examined are three lithium hydroxystearate greases, of different soap structures and soap contents, a low temperature sodium-based grease, and a high temperature clay-based grease, all in mineral oils. The film thickness of greases in EHL differs from that of pure mineral oils in one important aspect: with one charge of the lubricant the thickness decreases continuously with time. The time-dependent behavior of greases is examined in relation to the thickener structure, viscosity of the base oil, and the conditions of the inlet zone.

Grease-collecting heat exchanger installation

Abstract: A heat exchanger with a set of channels through which grease laden air travels. Relatively cool air passes through the heat exchanger in a second set of channels. Washing means including liquid tubes within the first set of channels is provided for washing collected grease from the surfaces defining the first set of channels. A cooking facility including a hood for collecting grease laden air connected to a heat exchanger. Relatively cool air from an outside source passes through the heat exchanger to promote the collection of grease in the exchanges from the grease laden air received from the hood. The air from the outside source is raised in temperature on passing through the exchanger. Such heated air may be used as a source of heat for heating a building enclosure.

Air cleansing unit

Abstract: A unit which when disposed substantially transversely relative to the direction of flow of a current of air containing entrained fine particles removes the major portion of such particles as the current of air flows therethrough. The unit is not limited to but is particularly effective in removing grease particles from a current of air moving upwardly at a substantial velocity from a range, broiler or the like, prior to the air entering a duct system for discharge to the ambient air atmosphere. In addition to serving the above functions, the unit also acts as a barrier to prevent a flame resulting from a flareup on the range or broiler initiating a fire in the duct system, which system may have a film of highly combustible material on the interior surface thereof. The unit includes no moving parts, may easily be cleaned, and so operates that collected grease has no tendency to leak back to the cooking surface. The current of air flowing through the unit is subdivided into a number of pairs of air streams. The first and second air streams that define each pair are caused to travel through the unit at different velocities. By bringing the first and second air streams of each pair together prior to discharge from the unit, the entrained particles are subjected to a centrifugal force that flings them against the interior surfaces of the unit, and the major portions of the particles adhering thereto rather than being discharged outwardly from the unit to the ambient atmosphere. When the air current is warm and contains grease particles, the collected grease particles will coalesce to define a liquid grease, which liquid grease as it forms tends to flow downwardly in the unit to a suitable trap if the unit is transversely disposed in the air current at a substantial angle. Due to this continuous removal of collected grease, the velocity of air flow through the unit is easily controlled, and the balance of the ventilation system maintained at a substantially constant value.

Grease thickened with lithium soap of hydroxy fatty acid and lithium salt of aliphatic dicarboxylic acid

Abstract: A MULTIPURPOSE GREASE HAVING A DROPPING POINT IN EXCESS OF 5000* F. IS PREPARED BY USING AS THE GREASE THICKENER A COMBINATION OF A LITHIUM SOAP OF A C12 TO C24 HYDROXY FATTY ACID, E.G. 12-HYDROXY STEARIC ACID AND A LITHIUM SOAP OF A C2 TO C12 ALIPHATIC DICARBOXYLIC ACID, E.G., AZELAIC ACID, AND BY EMPLOYING A PARTICULAR SEQUENCE OF STEPS THAT INCLUDES THE SEPARATE FORMATION OF THE INDIVIDUAL SOAPS IN THE BASE STOCK OF THE GREASE, THE HYDROXY FATTY ACID SOAP BEING FORMED FIRST.

Extended bearing lubrication method and apparatus

Abstract: Lubricating oil is dispensed at a slow rate over a long period of time to a bearing surface to be lubricated in a bearing structure having a relatively rotating hub and shaft assembly. The mass of grease is placed on a dispensing surface located on a surface of the rotating member of the assembly which faces the axis of rotation so that the centrifugal force of the grease mass against the dispensing surface causes oil release, while the grease body remains in place. The grease support surface may be integral with the bearing assembly or be provided by a removable grease support ring.

Functional surface coating compositions for cellulosic material

Abstract: Functional surface coating compositions, prepared by blending a mixture of a fluorine-containing phosphate material and a non-fluorine-containing material in aqueous medium, impart solvent, grease and oil resistance to cellulosic materials.

Combined grease trap and air filter for range hoods

Abstract: A combined, self-contained unitary filter element including both a grease trap-type air filter and an air-cleansing or purifyingtype filter, in particular, loose, particulate filtration media such as activated charcoal granules, with both types of filter advantageously combined into a unitary, self-contained unit in which the grease trap member forms a dished receptacle for the particulate media.

Cartridge-type grease guns

Abstract: An improved grease gun of the plunger type which uses replaceable grease cartridges. The grease gun consists of a cylindrical container adapted to receive an open ended cylindrical grease cartridge. The plunger is spring biased to urge grease from the cartridge into a discharging device of the piston displacement type. The plunger is guideably carried within the cylindrical container by an elongated rod having a handle portion projecting rearwardly from the container. To insure proper insertion of the plunger into the rearward open end of the grease cartridge, abutment means are disposed at an intermediate point on the elongated rod and movable therewith. Insertion of a fresh grease cartridge into the cylindrical container from its forward end causes the plunger to seat on the cartridge mouth. With the gun assembled for use, forward movement of the rod causes the abutment means to engage and force the plunger into a proper position within the cartridge mouth.

Food release coating

Abstract: Coating composition for applying grease resistant, non-sticking coatings to sheets of cellulosic material and the resultant products which are suitable for use in storing, displaying and cooking food products, the coating composition comprising at least one thickener or film forming material, a Werner type chromium complex and water.

Method and apparatus for removing grease from animal bones

Abstract: The invention comprises a method of and apparatus for removing grease from animal bones. Pipes containing nozzles are positioned in a slowly revolving drum, and pressurized boiling water is jetted from the nozzles against the animal bones which are agitated by the rotating drum.

Apparatus for manufacturing a tendon

Abstract: This invention is a tendon for post-tensioning concrete which includes a strand of wire which is encased in a grease lubricant of predetermined thickness, the lubricant being covered by a loose-fitting plastic jacket which is in spaced relation determined by the grease thickness, to the strand of wire. The tendon is manufactured in a continuous process by passing the strand of wire through a grease applicator and then through a die sized to control grease thickness for impacting the strand with grease lubricant forming an envelope around the strand, following which the grease-encased strand is passed through an extruder having a die for applying a thermoplastic material to the outer surface of the grease envelope. The thermoplastic material is water cooled upon engagement with the grease envelope, causing the material to congeal, thus forming a continuous protective jacket around the grease envelope.

Aluminum complex soap grease

Abstract: A GRESE COMPOSITION FOR LUBRICATING BEARINGS OPERATING AT TEMPERATURES UP TO ABOUT 350*F. COMPRISES A MINERAL LUBRICATING OIL BASE HAVING AN ANILINE POINT BELOW ABOUT 230*F. AND A GEASE-FORMING AMOUNT OF AN ALUMINUM COMPLEX SOAP OF A BENZOIC ACID AND (1) A SATURATED FATTY ACID HAVING FROM 20 TO 22 CARBON ATOMS PER MOLECULE OR (2) A SATURATED FATTY ACID MIXTURE WHICH CONTAINS AT LEAST 50 PERCENT BY WEIGHT OF C20 AND/OR C22 FATTY ACIDS. THE MOLAR RATIO OF BENZOIC ACID TO C20-C22 FATTY ACIDS IS ABOUT 1.25:1 TO ABOUT 2:1, BENZOIC ACID TO C20-C22 FATTY ACIDS, RESPECTIVELY. IF A SATURATED C14 TO C22 FATTY ACID MIXTURE WHICH CONTAINS ABOUT 50 TO ABOUT 60 PERCENT BY WEIGHT OF C20 AND /OR C22 FATTY ACIDS IS USED, THE MOLAR RATIO OF BENZOIC ACID TO SATURATED C14 TO C22 FATTY ACID MIXTURE IS ABOUT 0.7:1 TO ABOUT 1:1, BENZOIC ACID TO SATURATED FATTY ACID MIXTURE, RESPECTIVELY, THE GREASE COMPOSITION OF THE INVENTION IS DISTINGUISHED OVER GREASE COMPOSITIONS PREPARED FROM AN ALUMINUM COMPLEX SOAP OF BENZOIC ACID AND HYDROXYSTARIC ACID OR FATTY ACID MIXTURES WHICH PREDOMINATE IN C16 AND C18 ACIDS.

Cooking and smoking oven device

Abstract: The invention comprises a cooking and smoking oven device. The oven device has an electric heating element to cook the meat and char a wood material to create smoke in the oven during the cooking for smoking the meat. The oven device also has a grease pan above the wood material to catch grease drippings from the meat being cooked and to prevent the grease from dripping on the wood product. The grease pan is removable for cleaning. The oven device also has a smoke vent which is operable to be closed after the cooking is completed to retain the smoke in the oven while the meat is cooling.

Lubricating grease composition

Abstract: A highly corrosion resistant lubricating grease cmposition comprising a lubricating oil thickened with a gelling agent wherein the lubricating oil is prepared by intimately admixing a synthetic halogen containing polymeric lubricating oil and a fluorocarbon resin, freezing the mixture and thawing the frozen product

Metallic dibasic fatty soap based greases

Abstract: MONOHYDROXY FATTY ACIDS OR ESTERS ARE CYANOETHYLATED AND THE CYANOETHOXY FATTY DERIVATIVES IS TREATED WITH DILUTE HYDROGEN PEROXIDE IN A WEALKY BASIC MEDIUM TO CONVERT THE CYANO GROUP TO AN AMIDE FUNCTION WHICH IS THEN HYDROLYZED TO THE DIBASIC ACID. THE DIBASIC ACID IS REACTED WITH AN APPROPRIATE METALLIC BASE SUCH AS LITHIUM, SODIUM AND CALCIUM TO MAKE THE DIBASIC SOAP WHICH IS DISPERSED A PETROLEUM OIL BASE OR A SYNTHETIC BASE OIL OF THE DIESTER TYPE OF FORM A GREASE.

A method of treating oil, grease or fat

Abstract: 1,273,971. Degreasing compositions. G. MOREL. 6 May, 1968 [6 Feb., 1968], No. 5848/68. Heading C5D. [Also in Division C1] Oil, grease or fat deposited on road or floor surfaces, floating on water or in oil tanks of ships is removed or caused to sink by applying to the oil &c. a mixture comprising diatomite, diatomaceous earth, pumice or exfoliated vermiculite and trichlorethylene, tetrachlorethylene or carbon tetrachloride. The mixture may contain a surface active agent or a wetting agent.

Recovery of viscous acidic crude oils

Abstract: Methods are provided for cold recovery of highly acidic petroleum crude oils, i.e., those crudes having an acid number of at least about 2.5. The methods include injecting into the crude oil aqueous solution of barium hydroxide, whereupon the barium hydroxide reacts with the acid in the crude to form an oilsoluble barium soap. The barium soap emulsifies in the oil to form a grease-like barrier layer, and the crude is then pushed by a suitable pushing agent such as viscous water from behind the grease barrier, to a producing well from where the crude is produced.

Process for preparing mixed lithium-calcium soap thickened greases

Abstract: This invention concerns a novel process for preparing mixed alkali metal-alkaline earth metal soap thickened greases of depressed yield by a one-stop, non-melt process in which the temperature does not exceed the melting point of the alkaline earth metal soap contained in the grease during the entire grease manufacturing cycle. This procedure is especially useful in the preparation of water-resistant greases.

Low-temperature lubricating greases

Abstract: GREASE COMPOSITIONS COMPRISING (A) A LUBRICATING OIL COMPOSITION WHICH COMPRISED A BLEND OF SYNTHETIC ALARYL HYDROCARBON LUBRICANT AND A SYNERGISTIC AMOUNT OF A MINERAL LUBRICATING OIL AND (B) A GREASE-FORMING AMOUNT OF A CONVENTIONAL GREASE-FORMING AGENT, SUCH AS MODIFIED BENTONITE. THE GREASE HAVE GOOD TO EXCELLENT VISCOSITY PROPERITIES AT TEMPERATURES AS LOW AS -40 TO -62* F., THUS RENDERING THEM USEFUL AT THESE TEMPERATURES. USE OF A BLEND OF SYNTHETIC ALKARYL HYDROCARBON LUBRICANT AND A MINERAL LUBRICATING OIL, AS COMPARED TO USE OF A SYNTHETIC ALKARYL HYDROCARBON LUBRICANT ALONE, RESULTS IN A GREASE COMPOSITION HAVING IMPROVED LOW TEMPERATURE VISCOSITY PROPERTIES, WHICH IS ALSO LOWER COST.

Paraffin wax coating compositions

Abstract: A COPOLYMER OF VINYL ESTER AND VINYL PYRROLIDONE IS INCORPORATED INTO PARAFFIN WAX, ALONE OR IN CONJUNCTION WITH THE INCORPORATION THEREIN OF A COPOLYMER OF ETHYLENE AND VINYL ACETATE TO PROVEDE A BLENDED PARAFFIN WAX COMPOSITION HAVING ENHANCED SCUFF RESISTANCE AND/OR GREASE RESISTANCE AND/OR SLIP CHARACTERISTICS. THE VINYL PYRROLIDONE CONTENT OF THE COPOLYMER OF VINYL ESTER AND SAID VINYL PYRROLIDONE IS FROM ABOUT 10% TO ABOUT 70% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF SAID COPOLYMER. AT LEAST ABOUT 5% BY WEIGHT OF SAID COPOLYMER OF VINYL ESTER AND VINYL PYRROLIDONE IS EMPLOYED BASED ON THE TOTAL WEIGHT OF SAID WAX COMPOSITION, THE AMOUNT OF SAID COPOLYMER EMPLOYED RANGING UP TO ABOUT 75% BY WEIGHT WHEN SAID COPOLYMER IS EMPLOYED ALONE AND UP TO ABOUT 50% BY WEIGHT WHEN SAID COPOLYMER IS EMPLOYED IN CONJUNCTION WITH SAID COPOLYMER OF ETHYLENE AND VINYL ACETATE.

Extended service interval grease compositions

Abstract: A GREASE COMPOSITION IS PROVIDED COMPRISING A MAJOR PORTION OF A MINERAL OIL OF LUBRICATING VISCOSITY AND EFFECTIVE AMOUNTS OF (1) AND ALKALI METAL OR ALKALINE EARTH METAL SOAP OF A FATTY ACID, (2) A N,N-DI(HYDROXY-LOWER ALKYL) SATURATED ALIHATIC CARBOXAMIDE AND (3) AT LEAST ONE ALKALI METAL SALT OF A MEDIUM-TO-LONG-CHAIN ALIPHATIC ORTHO- OR PYROROPHOSPHATE ESTER, METAL OR ALKALINE EARTH METAL SOAP IS A SOAP COMPLEX OF A MIXTURE OF A FATTY ACID AND A LOW MOLECULAR WEIGHT ALIPHATIC ACID. THE GREASES DESCRIBED HAVE SUPERIOR RUST INHIBITION PROPERTIES. THE GREASES ALSO RETAIN THEIR PENETRATION PROPERTIES WHEN CONTACTED WITH WATER AND HAVE SUPERIOR ADHESIVENESS QUALITIES.

Grease compsn - contng a polysiloxane a polyether and a base

Abstract: Grease compsn. comprises (a) 61 - 98% wt. of a fluid methyl polysiloxane of viscosity 10 - 100,000 cS having formula (CH3)nSiO 4-n/2 where is 2.002 - 2.2, (b) 2 - 35% wt. of a grease thickening Li soap of a fatty acid, (c) 0.01 - 5.0% wt. of a polyether of formular A-O-(CxH2xO)nB or A- O-(CxH2xO)n- y-(Q)z (in which A and B are H, 1 - 12C alkyl, 5 - 7C cycloalkyl, mononuclear and binuclear aryl or binuclear aryl lower alkyl where the alkyl grps. attached to the aromatic nucleus contain a total of is not >5C, Q is a residue of a polyhydric initiator radical contg. >=2 OH gps. selected from ethylene glycol, glycerol, trimethylolpropane and other polyhydric alcohols with 2 - 6 OH, x is 2 - 4, y is 2 - 10, z is 1 - 5) the polyether having mol.wt. 300 - 200,000, (d) a metal base in amount to maintain the grease alkaline.

Tertiary diamide based grease

Abstract: NOVEL GREASE COMPOSITIONS CONTAINING MAJOR AMOUNTS OF LIQUID TERTIARY DIAMIDES HAVING THE FOLLOWING STRUCTURAL FORMULA: R''-N(-CH3)-CO-(CH2)N-CO-N(-CH3)-R'' WHEREIN R'' = CH3-(CH2)M-CH(-R)-(CH2)X- WHEREIN R=N, ALKYL RADICAL HAVING C1-C5, M= 2-8, X= 1-5 ARE DISCLOSED THESE GREASES ARE USEFUL IN A HIGH AND/OR LOW TEMPERATURE ENVIRONMENT