Abstract: A fluid reservoir assembly having a pan defining a drain opening and a plug disposed therein is disclosed. The pan includes a pair of ramps disposed on an inner surface thereof adjacent the drain opening. The plug includes a pair of wings in engagement with the ramps. The ramps increase in height relative to the inner surface of the pan along a first direction of rotation about the central axis. The plug is drawn into sealing engagement with an outer surface of the pan by rotating the plug in the first direction of rotation about the central axis thereby moving the wings up the ramps. The pan includes at least one stop to prevent over-rotation of the plug. The ramps define a recess to secure the wings in a closed position.

Abstract: Paper shredders are maintained using lubrication substrates that have been treated with or that carry a lubricant. The lubrication substrate is fed through the shredding mechanism of a paper shredder. Rather than requiring disassembly of the paper shredder, maintenance and lubrication can be performed by passing the lubrication substrate through the shredding mechanism. The lubrication substrates can take any of a variety of forms, such as a tissue that is encased in a cellophane or plastic envelope and is impregnated with oil. The lubrication substrates can instead have an array of small tubes that carry oil. In another example, the lubrication substrates can take for them of a bubble sheet that carries oil within the bubbles.

Abstract: Methods and apparatus to flush residual used oil from the lubrication system of an engine during an oil change. The method includes draining used oil from a tank of the lubrication system and then adding fresh oil to the tank. An adaptor or fitting is used to provide an outlet in the lubrication system to flush any residual used oil that may not have been drained along with used oil in the oil tank. The engine may be started such that a scavenging pump of a lubrication system pumps residual used oil out of the system through the outlet. Once a user observes that residual used oil has been substantially flushed from the system, the engine is stopped to terminate the flushing process.

Abstract: A rotary feed-through, which contains a hollow shaft, which is supported in a first housing part so that it can rotate, with a first sealing surface and a sealing bushing, which is arranged rotationally fixed within a second housing part and which is coaxial with the hollow shaft, with a second sealing surface for contact to the first sealing surface. In order to also enable lower leakage losses, in addition to less wear, with the supply of cooling lubricants and compressed air, the second housing part contains a first lateral supply channel, which can be attached to a coolant supply line or a compressed air supply line, for the supply of cooling lubricant or compressed air via at least one radial opening of the sealing bushing and a second supply channel, which is charged during the supply of cooling lubricant, for the supply of cooling lubricant to a pressure piston, which closes the rear end of the sealing bushing, to increase the contact pressure of the sealing surfaces.

Abstract: Methods and apparatus to flush residual used oil from the lubrication system of an engine during an oil change. The method includes draining used oil from a tank of the lubrication system and then adding fresh oil to the tank. An adaptor or fitting is used to provide an outlet in the lubrication system to flush any residual used oil that may not have been drained along with used oil in the oil tank. The engine may be started such that a scavenging pump of a lubrication system pumps residual used oil out of the system through the outlet. Once a user observes that residual used oil has been substantially flushed from the system, the engine is stopped to terminate the flushing process.

Abstract: A tool consists of a combination engine in the form of a two-cycle engine, and a motion conversion device which is connected to said combustion engine and which is located in a housing. The housing is filled with oil for lubricating the motion conversion device. A conveying device with which the oil is conveyed from the housing to the combustion engine is provided, said combustion engine being lubricated exclusively with oil from the housing and having no separate oil supply.

Abstract: The invention describes an arrangement of lubricating grease (2) inside the housing of a gear unit (1) with rotatable components, particularly the gear unit of a jack (5). It also describes a grease pouch (3) for receiving lubricating grease (2) and a method for lubricating the gear unit (1) with lubricating grease.

Abstract: In order to free a seized valve, an inspection port is formed in a wall of the valve body and the areas where the valve is seized are determined. One or more injection ports are formed in the valve body adjacent to the seized portions of the valve, pressurized fluid (preferably an insoluble lubricant having a very high cone penetration) is injected through the or each injection port and the injection ports are then closed.

Abstract: An oil injection apparatus for injecting lubricating oil to gears, bushings and the like includes an oil injection dock, which has a housing section for holding a plurality of objects for oil injection, and an oil injection section corresponding to the housing section. The oil injection section has a plurality of oil injection outlets and a sensor. When the object for oil injection drops into the oil injection section, the sensor transmits a signal to an oil supply device to inject lubricating oil through the oil injection outlets to the object.

Abstract: An apparatus and method for conveniently and easily applying a dry sliding lubricant to the interior and exterior surfaces of a cartridge case neck prior to sizing is provided.

Abstract: A portable arrow lubricant container-applicator system for use in connection with sport bow shooting where arrows are shot into simulated target figures and where it is necessary to quickly and efficiently remove the arrows from the target figure without damage to the arrow tip or shaft and to minimize damage to the target figure. A lubricant container-applicator is provided for holding an absorbent medium which receives a liquid medium to prevent loss and spillage of the lubricant from the lubricant container-applicator. A septum type lid may be provided to allow insertion and removal of the arrow tip and shaft into the lubricating medium and for providing an arrangement for coating the arrow tip and shaft with the desired amount of lubricant. An insertion limiting device can be provided to adjust the length of the extent of insertion of the arrow into the lubrication medium.

Abstract: A method and apparatus for applying a lubricant to an object is disclosed. The lubrication apparatus includes a rotatable and cylindrically shaped brush for applying the lubricant to the object, a housing for holding the brush, and a pump for applying the lubricant to the brush located in a chamber positioned below the brush. A vertical slide cylinder moves the brush in a generally vertical direction along the central axis in and out of the chamber, and a horizontal slide cylinder moves the brush in a generally horizontal direction transverse to the central axis to contact the object. The chamber has a sloped chamber cap connected to the top portion of the chamber for collecting lubricant that drips from the brush. The brush is preferably rotated by a motor.

Abstract: In a linear guide apparatus having an axially extending guide rail including a first loaded ball rolling groove formed in an inner lateral side of the guide rail; a slider fitted loosely inside the guide rail and including a second loaded ball rolling groove formed in an outer lateral side of the slider and a circulator with an unloaded ball circulating passage which extends axially; and a plurality of balls rolling along the first and second loaded ball rolling grooves via the unloaded ball circulating passage to support the slider moving axially relative to the guide rail, the linear guide apparatus further has a lubricating mechanism which includes a lubricant feed hole formed in a bottom of the guide rail and a lubricant injection port of the circulator to communicate with the unloaded ball circulating passage, the lubricant injection port connecting the lubricant feed hole at a predetermined position of the slider relative to the guide rail.

Abstract: A unitary device for a vehicle for removing spent oil from an oil pan reservoir installed in an access aperture located in a floor bottom of the oil pan reservoir. The device includes a quick connect nipple having a first end threadably sealing into the access apertures and a second end releasably engageable with a mating fitting positioned on an externally located fluid delivery device and further having a fluid tight closure when the second end is disengaged from the fluid delivery device. The quick connect nipple includes a throughbore from the first end to the second end for the passage of spent oil when the second end is engaged with the fluid delivery device and a cylindrical magnet secured to the first end of the quick connect nipple for capturing metallic material in the oil pan reservoir as the oil passes through the cylindrical magnet prior to passage in the throughbore.

Abstract: A method, and associated apparatus, or applying fluid lubricant to hydrodynamic bearing. Clearance spaces of the bearing which are to be filled with the fluid lubricant are evacuated. The fluid lubricant is then applied to the clearance spaces. Once the fluid lubricant has been applied to the clearance spaces, or concurrent therewith, the clearance spaces are returned to ambient pressure levels. Any pockets of air, or other gas, trapped within the bearing are collapsed as the clearance spaces are returned to the ambient pressure levels. The method is amenable to a high volume, assembly line-like process wherein large numbers of bearings may be filled with the fluid lubricant in a short period of time. A conveyor conveys the bearings into a pool of fluid lubricant in a vacuum tank having a pressure level adjustable between an ambient pressure level and an evacuated pressure level, through the pool of fluid lubricant, beyond the pool, and out of the vacuum tank.

Abstract: A portable arrow lubricant container-applicator system for use in connection with sport bow shooting where arrows are shot into simulated target figures and where it is necessary to quickly and efficiently remove the arrows from the target figure without damage to the arrow tip or shaft and to minimize damage to the target figure. A lubricant container-applicator is provided for holding an absorbent medium which receives a liquid medium to prevent loss and spillage of the lubricant from the lubricant container-applicator. A septum type lid may be provided to allow insertion and removal of the arrow tip and shaft into the lubricating medium and for providing a means for coating the arrow tip and shaft with the desired amount of lubricant. An insertion limiting device can be provided to adjust the length of the extent of insertion of the arrow into the lubrication medium.

Abstract: Improved drain plug structure and method for the oil pan of the crank case of an automobile engine of the like, which permits removal of the drain plug for draining oil from the oil pan without leaking of oil on tools or personnel. In accordance with the invention, a resilient sealing member is provided operably positioned in relation to the stem of the drain plug and the opening through the oil pan to prevent undesired leakage between the drain plug and oil pan during removal of the drain plug. In a preferred embodiment, the sealing member is a cylindrical, resilient disc of sealing material secured to the end of the stem of the drain plug. In a modification, the diameter of the sealing member is adjusted by placing a disc over the sealing member and compressing the sealing member between the disc and end of the stem of the drain plug.

Abstract: A lubricant dispenser has a housing, a piston subdividing the housing into a pair of compartments one of which is generally closed and the other of which is adapted to be connected to a machine to be lubricated, a body of a reactive liquid in the one closed compartment, and a body of a fluent lubricant in the other compartment. The piston is movable against the lubricant body to force same from the housing to the machine. A reactive element in the one compartment can react with the liquid and form a gas when immersed in the reactive liquid to push the piston with the gas against the lubricant body and expel the lubricant from the housing. The reactive element is constituted as a coherent block by a multiplicity of particles of an active substance capable of reacting with the liquid and forming a gas on reaction therewith and a multiplicity of particles intermixed and in electrically conductive engagement with the active particles of a substance that is substantially less reactive.

Abstract: A grease fitting adapter for lubricating a Hendrickson suspension of a vehicle. The adapter includes a bracket and a hose connected to the bracket. The hose has a first end with a fitting thereon to cooperate with a fitting in the Hendrickson suspension. The hose has a second end with a fitting thereon to receive the lubricant from a source of lubricant. The adapter is mounted on the Hendrickson suspension by a fastener connected to the bracket and is mounted such that the lubricant is introduced from the outer side of the vehicle. A retrofit kit and a method of lubricating the Hendrickson suspension is disclosed.

Abstract: Apparatus and method of exchanging lubricating oil from the crankcase of a compressor. A unit including a pretrimmed flexible tube is introduced into the oil fill plug opening. By opening an internal valve, the oil under pressure exits through an opening in the unit, which is connected to a drain hose. After emptying, a hand oil pump is connected to the unit and fresh oil introduced into the compressor crankcase.

Abstract: A lubrication system for an overriding starter clutch assembly includes an axial input passage through the clutch shaft to radial passages supplying the oil to the inlet of the clutch working unit. A centrifugal pump created by vanes in the clutch housing end face pulls the lubricating oil axially through the clutch.

Abstract: A portable lubricant system for use in connection with sport bow shooting where arrows are shot into simulated figures and where it is necessary to quickly and efficiently remove the arrows from the figure without damage to the arrow. A casing is provided and holds an absorbent medium which receives the liquid lubricant to prevent loss of the liquid from the casing. A septum type lid allows insertion and removal of the arrow into the medium and removal of the lubricated arrow for use and limiting devices can be provided to adjust the length of extent of insertion of the arrow into the enclosure.

Abstract: The present invention is a graphite lubrication apparatus for lubricating the support rollers of a drying kiln, dryer or the like by dispensing graphite powder across the surface of the rollers. It has a graphite storage means for storing the graphite powder to be used for lubrication; a dispensing pipe adjacent the graphite storage means and having a top and bottom and a plurality of receiving holes in the top thereof the receiving holes permitting communication of the graphite from the storage means into the dispensing pipe. The dispensing pipe also having a plurality of discharge holes positioned adjacent the roller. The discharge holes permit the discharge of graphite onto the roller. A discharge means discharges graphite from the dispensing pipe onto the roller.

Abstract: A vehicle drip guard for collecting fluids that leak from a vehicle comprising a sheet of material adapted to be extended under a vehicle; an absorbent mechanism disposed upon the sheet for collecting leaking fluids from a vehicle; and a coupling mechanism for coupling the sheet under and to a vehicle.

Abstract: An apparatus for lubricating pipe joints is described which includes a generally cylindrical plug adapted to fit into a female box connection of a length of pipe. The plug has a first end, a second end, a circumferential exterior surface and a blind interior bore which extends through the first end and terminates short of the second end. The exterior surface has a network of channels. A plurality of lubrication passages extend through the plug from the blind interior bore to the network of channels on the exterior surface. When lubrication compounds are pumped under pressure into the blind interior bore, the lubrication compounds pass through the lubrication passages into the network of channels on the exterior surface of the plug thereby thoroughly coating the female box connection with lubricant. An end cap covers the first end of the plug. The end cap has a flange that extends beyond the circumferential exterior surface.

Abstract: An elongate flexible magnetic member collects metallic debris from lubrication fluids, such as oil, in lubrication systems associated with motors. In one embodiment, the member is attached at one end to a swivel, which is in turn attached to a drain plug. The drain plug is threaded into and sealed to an oil pan drain hole. The elongate flexible magnetic member has a magnetic surface that positions the member in the lubrication system and attracts metallic particles. In a second embodiment, the magnetic member is held in a loop by a flexible retainer. The retainer is connected at one end to the swivel. In a third embodiment the member may be attached to the oil intake portion of the oil pump. In a further embodiment a method of evaluating engine part misalignment is provided.

Abstract: A fitting for connection to a threaded drain hole of a crankcase of a compressor, the fitting including a tool engaging member having surfaces thereon for engagement and rotation by a tool, a drain plug projecting in a first direction from the tool engaging member, the drain plug being externally threaded for engagement with the threaded drain hole, a connection member for connection to a refrigeration service hose having an internally threaded connection, the connection member having an externally threaded surface for engagement with the internally threaded connection of the refrigeration service hose, the connection member projecting from the tool engaging member in a second direction substantially opposite to the first direction, a channel passing through each of the drain plug, the tool engaging member, and the connection member, and a depressible valve core disposed within the channel and within the connection member.

Abstract: A method of formulating a nonflammable water based lubricant emulsion having excellent anti-seize and low friction properties for wood cutting and metal machining containing preferably an oil-in-water emulsion and finely divided polytetrafluoroethylene particles in the water phase and delivered in small amounts by mist or spray to the working parts.

Abstract: A solid film lubricant having a certain degree of flexibility when cured to, for instance, enhance the wear life of the lubricant. In one embodiment, a composition of such a lubricant includes a dichalcogenide such as molybdenum disulfide and a chlorotrifluoroethylene-vinyl chloride copolymer binder. In addition, a silane curing agent may be utilized to react with the binder to improve the properties and/or performance characteristics of the lubricant.

Abstract: A dosing device for a lubricating mechanism is constructed for discharging a measured volume of lubricant into a component to be lubricated, such as a rotary gear box in an aircraft. For this purpose the dosing device has a housing with a defined volume in which a piston is movable in an axial direction to define two chambers. The end walls of the housing are connected through quick coupling connectors to a lubricant supply and to the component to be lubricated. The device operates in such a way that the filling of one chamber with lubricant under pressure pushes the piston, and thus the lubricant in the other chamber, out into the component to be lubricated. Thus, always a precisely measured volume of lubricant is discharged from one chamber while the same volume is being filled into the other chamber and vice versa. A coupling adapter may be used for a quick reversal.

Abstract: In a method of lubrication between two sliding members at least one of which is made of a ceramic material, the improvement according to the present invention is characterized in that soot as produced by burning a hydrocarbon fuel is supplied between the two sliding members.

Abstract: In a meter counter assembly of a gas meter, a rotatable shaft of a gear train is journaled in a bore that extends through a support plate mounted in the housing of the counter. The plate is of a porus material, forming capillary passages for the transmission of lubricant therethroughout. A portion of the support plate extends into a lubricant reservoir in the housing. In use, lubricant migrates through the capillary passages to the bore from the reservoir for lubrication of the shaft.

Abstract: A button lubricator applicator system is provided. It consists of a closed structure defining a closed end cylindrical housing having a removable open or lid end, with amine and organo-silicone positioned in the cylindrical housing, together with an air water valve of selected and predetermined shape positioned in the removable open end. The air water valve is depressed in the applicator in contact with the silicone material in order to lubricate it.

Abstract: The services normally associated with the lubrication oil tank used on aircraft are made dependent of each other by the judicious location of the various service housings, inlet ports and internal passages. The caps of the pressure fill port and overfill port are sequentially removable in order to prevent fill while the overfill port is blocked off. The overfill port and JOAP port are combined and internal valving automatically responds to the type of service called for.

Abstract: Apparatus and method of lubricating leads for installation of a component on a circuit board. In the process, a strip of conductive foam is compressed and inserted into a solution of solvent and lubricant operation. The compressed form is permitted to expand within the solution thereby resulting in the foam being saturated with the solution. The saturated foam is air dried to remove the solution and produce a foam that is impregnated with the lubricant. The leads of the component are inserted into the impregnated foam thereby resulting in each component lead being covered with a thin coat of the lubricant.

Abstract: A tapered liquid container which is nestable with other like empty containers and a collector for receiving empty containers in nested relationship. The container has a tapered side wall, a large bottom end, and a small top dispensing end. A closable large bottom opening and a closable small top opening is formed in the bottom and top ends, respectively. A bottom closure seals the bottom opening and is removable when dispensing the liquid. A top closure is provided for sealing the top opening and is removable to permit liquid to be emptied. The collector includes an upper portion having a tapered socket for receiving an inverted empty container body with the top and bottom closures removed to permit draining of residual liquid. The tapered socket holds the container securely to permit successive containers to be inserted into the open bottom end when the bottom closure is removed of a preceding container. The containers are thus nested for consolidation and draining of residual liquid.

Abstract: A defueling fitting is adapted to facilitate removal of fuel from an aircraft fuel cell through a flush-mounted fuel drain having a depressable valve stem. It includes a flange with spaced circumferential seals. A vacuum outlet leads between the seals to facilitate attachment of the flange to an exterior aircraft surface surrounding a fuel drain. A separable probe includes a pin actuator for depressing the valve stem of the fuel drain and one or more liquid passages for directing draining fuel through the flange through an attached hose. The method for defueling involves first attaching the flange to the aircraft surface surrounding a fuel drain by application of reduced pressure between the circumferential seals and subsequently depressing the valve stem of the fuel drain to direct fuel through an enclosed liquid passage.

Abstract: An oil drainage coupler that enables a single fitting to be coupled to associated oil drainage plugs of various sizes thereby enabling oil to be quickly drained from all makes and models of vehicles. This coupler produces a vacuum-tight seal that enables a vacuum pump to be used to enhance the rate at which oil is drained. The two halves of this coupler can be coupled by a rotation of one half into the other by an angle less than 90.degree., thereby making this a quick coupler that can be coupled by a single quick motion of vehicle service personnel.

Abstract: A lubricant filled drive assembly is disclosed having an insert to displace a portion of the required volume of lubricant. The insert is shaped so as to receive interchangeable or optional pieces of drive assembly equipment, and when certain pieces of equipment are not used, plugs are added to the assembly to occupy the empty space within the insert. By eliminating any unoccupied space, the plugs alleviate the need for additional lubricant which might otherwise be a cost of adding flexibility to the gear drive. The insert and plugs are preferably coated with a lubricant impermeable layer.

Abstract: The water lubricity of ceramic materials is improved by a method including causing friction of the ceramic materials in the presence of water, thereby forming silanol groups on surfaces undergoing the friction, supplying the surfaces with a water-soluble silane coupling agent having alkoxyl groups to hydrolyze the alkoxyl groups into silanol groups, and reacting the silanol groups formed by the hydrolyzation of the alkoxyl groups with the silanol groups formed on the surfaces, thereby forming a siloxane film having siloxane bonds on the surfaces.

Abstract: The diametrically larger end of a boot abutted on the open end of a joint unit on a vertical posture driving shaft is separated from the open end and held there while a liquid such as a grease is injected through the opening thus created. The end of the boot is then fitted over the outer periphery of said open end. A boot opening/closing device for doing so includes a vertically movable clamping member for clamping the boot at a portion adjacent the larger end, moving it away from the open end, holding it there during injection of the liquid by a movable nozzle and fitting it.

Abstract: A packaged grease composition for lubrication of fifth wheels on tractor-trailers or similar vehicles is disclosed. The packet consists of a grease composition sealed in a thin walled plastic envelope. The grease filled envelope is placed on the base plate of the fifth wheel and the envelope readily ruptures under pressure when the plates forming the fifth wheel come together releasing the grease to lubricate the plates. The plastic subsequently disintegrates as these plates rotate on each other leaving no environmental waste to dispose of. The envelope may come in different shapes or the lubricant or envelope may be color coded to indicate the type of lubricant contained within the envelope.

Abstract: A new method and apparatus for quickening in the insertion of a fish tape through a conduit by reducing the occurrence of frictional adhering. The apparatus provided in several embodiments uses flexible lubricant carrying materials having pressure sensitive fluid release characteristics affixed to the free end of a fish tape. The apparatus is saturated with a fluid lubricant prior to being inserted into an opening of the conduit and pushed. As the pressure sensitive material enters a bend in the conduit, pressure is applied to the pressure sensitive material by the long radius wall surface of the bend causing lubricant to be released. The possibility of frictional adhering of anything being pushed through the bend is greatly reduced. The apparatus moves past the well lubricated area and is immediately followed by the body of the fish tape.

Abstract: A self lubricating nut having a central cavity for insertion of a bolt, a lubricant passage through said nut which opens into an internal bored circumferential gland, and at least one internal bored axial gland which crosses said circumferential gland.

Abstract: A lubricant composition with decreased solubility in a liquid refrigerant and increased foaming characteristics useful in refrigeration systems to promote oil return to a compressor. A lubricant composition comprises a base lubricant, synthetic paraffinic oil, and a foaming agent. These ingredients are blended in predetermined amounts, so that when the lubricant is used in the refrigeration system, an oil rich layer will form atop the liquid refrigerant in the system's flooded evaporator, and a thick, stable foam will form when vaporized refrigerant boils up through the oil rich layer. The oil foam is then drawn through a connection at the top of the flooded evaporator and returned to the compressor.

Abstract: A rolling bearing assembly for mounting a shaft or similar member which has a housing encircling the shaft with at least one rolling bearing installed between two securing rings. The assembly consists of an outer and an inner race and at least one row of rolling elements. It has annular chambers in the housing on either side of the bearing, closed off on their outer edges by annular seals which are attached to the housing and in contact with the bearing shaft. It has at least one hole opening into one of the annular chambers throught the wall of the housing, capable of being placed in communication on the outside with a feeding device for introducing a lubricant into the housing. There are two channels (17, 17') extending through the wall of the housing (1) and located diametrally opposed to each other, each opening into the closed annular chamber (8), and in that a trough-like receptacle (18) is accommodated in said channels, in which an excess of lubricant can be collected.

Abstract: The invention relates to a method for preventing leaks in a propeller shaft bearing arrangement including a plain bearing (2), which is lubricated with oil or water and which supports the propeller shaft (1) extending through an opening in the body (4) of a hull, and packing members (6,7) for keeping the lubricant in the lubrication space and for preventing water from entering the bearing arrangement. According to the invention, the pressure vibrations occuring in the lubricant are equalized arranging, in the lubrication space, a medium possessing a high compressibility, which medium by means of changes in volume receives and equalizes said pressure vibrations.

Abstract: An external lubricant reservoir of the type that is replenished by injection is provided in the form of a flexible membrane sealed to a lubricant distributor. The lubricant distributor consists of a membrane-mounting disk and a lubricant feed tube. The feed tube communicates with the reservoir interior through a passage in the disk. The feed tube is designed to be inserted into a lubricant passage in the housing of a joint or a bearing. A preferred embodiment of the reservoir enables the membrane to be wedged between a joint or bearing housing and the underside of the membrane-mounting disk to effect a sealed connection between the two.

Abstract: The invention relates to a method for preventing leaks in a propeller shaft bearing arrangement including a plain bearing (2), which is lubricated with oil or water and which supports the propeller shaft (1) extending through an opening in the body (4) of a hull, and packing members (6,7) for keeping the lubricant in the lubrication space and for preventing water from entering the bearing arrangement. The pressure vibrations occuring in the lubricant are equalized by arranging, in the lubrication space, a medium prossesing a high compressiblility, which medium through changes in volume receives and equalizes said pressure vibrations.

Abstract: A lever arrangement comprises a bearing pin and a supply space arranged next to the bearing opening of at least one of the levers and which contains a high-viscosity lubricant. In the operation of the lever arrangement with alternating tilting direction, the lubricant arrives, due to its inertia, in the respectively unstressed part of the bearing gap between the levers. The arrangement is suited particularly for highly stressed parts in the mechanism of circuit breakers which must be designed for space saving due to the small space available. The service life of such lever arrangements is increased substantially by arranging the lubricant in the supply space. The supply space can be part of a sleeve braced on the bearing pin.