Abstract: Lubricant pump systems and associated methods for aircraft engines are provided. The method includes receiving an input torque, dividing the input torque between a first load path receiving a first portion of the input torque, and a second load path receiving a second portion of the input torque. A first lubricant pump of the aircraft engine is driven via the first load path using the first portion of the input torque. A second lubricant pump of the aircraft engine is driven via the second load path using the second portion of the input torque. When a malfunction of the second lubricant pump occurs, the method includes ceasing to drive the first lubricant pump and the second lubricant pump using the input torque.

Abstract: A return stop limiting torque, particularly for conveyer systems, including an internal ring, a concentric external ring, and several retaining elements arranged in the annual gap between the rings, which allow a relative rotation between the rings in one direction, and block it in the other direction through form-fitting or frictional engagement. The external ring has friction areas at its radially extending faces, which can axially be clamped against the corresponding friction disks, with the friction disks being supported in a torque-proof fashion but at least partially axially displaceable. Here the external ring is divided into several axially adjacent partial rings, each being axially spaced from one another by an annular gap such that another friction disk is arranged respectively in this annular gap, which is supported in a torque-proof fashion but axially displaceable, and all of the partial rings and friction disks are axially clamped to each other.

Abstract: A torsional damper includes a torque limiter and a damper. The torque limiter includes at least two friction members, allows transmission of torque, and prohibits transmission of excessive torque. The damper absorbs torsional vibration through resilient deformation of a spring. The torque limiter is a wet torque limiter in which the friction members are arranged in an oil chamber filled with lubricating oil. The damper is a dry damper in which the spring is not immersed in the lubricating oil.

Abstract: The present invention broadly comprises a torque limiter including a sealed vessel with a damper assembly and a clutch arranged to receive torque from a drive unit and to transmit the torque to the damper assembly. The clutch is loaded independent of an engagement of the limiter with the drive unit. A reaction force between a resilient element in the clutch and the vessel preloads the clutch. The clutch is arranged to slip at a specified torque value. The resilient element is arranged to preload the clutch such that the clutch remains fully engaged up to the specified torque value. In some aspects, the limiter includes a drive unit connection plate and the clutch is disposed between the connection plate and the vessel. In some aspects, the vessel includes a housing connected to the connection plate and the clutch is disposed between the housing and the damper assembly.

Abstract: A power transmission apparatus for a compressor used in an air conditioner for a vehicle including a damper mounted to one side of a pulley rotated by a driving power transmitted from an engine wherein the damper and an elastic portion is formed between an outer ring and an inner ring, and wherein a mounting flange of the outer ring is coupled to the pulley and a mounting flange of the inner ring is coupled to a limiter. The limiter has a plate shape and comprises: a middle portion in a ring shape, an outside portion in a ring shape around the edge of the middle portion, and a neck portion connecting the middle portion and the outside portion, whereby upon overload, the neck portion is broken. The middle portion of the limiter is coupled to a hub, and the hub penetrates the center of the inner ring and is coupled to the limiter between the damper and the pulley.

Abstract: A slip clutch acts between a shaft and a housing. The slip clutch includes an oil reservoir within the housing and one or more slipping surfaces disposed in the oil reservoir that are keyed to the shaft and possibly alternately to the housing. The slipping surfaces may include stacked plates or washers. Each of the washers includes an oil groove or other structure on one surface thereof that maintains a consistent film of oil on the washer surfaces. The stacked washers slip relative to one another such that the shaft rotates relative to the housing upon an application of torque that exceeds a predetermined torque.

Abstract: A torque limiter comprising an inner ring fitted inside an outer member; and a torque transmission member interposed between said inner ring and said outer member. A predetermined torque is generated by a friction generated between said inner ring and said torque transmission member, when said inner ring and said outer member rotate relatively to each other. The members are impregnated with lubricating oil to slide said members on each other. The lubricating oil contains a base oil consisting of synthetic saturated hydrocarbon oil having a kinematic viscosity of 500 to 1200 mm2/s at 40° C. and an emulsifier added to said base oil. The lubricating grease contains the base oil consisting of the synthetic saturated hydrocarbon oil having a kinematic viscosity of 500 to 1200 mm2/s at 40° C. and an emulsifier and a thickener both added to said base oil.

Abstract: A coupling device has a pulley that receives rotational torque from an engine. The torque is transmitted to a shaft through a hub and a one-way clutch. A torque limiter is screwed on the shaft to fasten the inner ring of the one-way clutch onto the shaft. The torque limiter has a breakable portion. The torque is directly transmitted from the inner ring to the shaft when the torque is normal. If the torque exceeds the tightening torque of the torque limiter, the inner ring begins to slide and rotate, and drives the torque limiter in a tightening direction. As the torque limiter is tightened additionally, the tensile stress on the breakable portion is increased. Then, the breakable portion breaks and is separated in axial direction so that the coupling device disconnects torque transmission.

Abstract: A torque-limiting coupling device including a cylindrical sleeve and a cylindrical shaft in radially tensioned frictional engagement for transferring torque up to a torque limit that corresponds to the radial tension and at which the sleeve begins to rotate relative to the shaft. The device also includes at least one pump mechanism which is adapted to be driven to pump liquid to the interface between co-acting surfaces of the sleeve and shaft upon relative rotation between the sleeve and the shaft. The shaft includes a surface layer that defines one of the co-acting surfaces and that is made of a material, e.g. tombak, whose plasticizing limit is lower than the plasticizing limit of the material in the co-acting surface of the sleeve. The surface layer may include cavities which enable the surface layer to take a smaller radial thickness after plasticization thereof.

Abstract: A shock absorber for a starter is presented. The shock absorber includes a rotary disk, a stationary disk and a disk spring. The rotary disk is pressed by the disk spring against a stationary disk to generate frictional force when the rotary disk is rotated by an excessive shock thereby absorbing the shock. The rotary disk has a plurality of press-formed rectangular dimples at a surface opposite the stationary disk, and each side of each the rectangular dimple inclines to a direction of rolling of the raw material of the rotary disk.

Abstract: A torque limiting apparatus includes: a connecting shaft (20), the output side of which is connected to a differential gear system (60), and the input side of which is protruded out of an opening (80b) formed at the housing (80) of the differential gear system; a hollow cylindrical casing (10) supported on the input side of the connecting shaft rotatably relative thereto, and connectable to the drive shaft; a seal member (14) for interconnecting liquid-tightly an opening at the output side of the casing and an opening of the housing, and a connecting mechanism (30) provided between the casing and the connecting shaft, for transmitting only a partial power less than a predetermined torque value out of whole power input into the casing, so that a lubricating oil can be automatically supplied.

Abstract: A coupling for transmitting torque between two parts which are rotatable relative to one another, which coupling comprises a friction coupling whose friction plates are each non-rotatably connected to the one and to the other of the parts which are rotatable relative to one another, having a pressure chamber which is filled with a highly viscous fluid and which is formed by a housing formed in one of the rotatable parts and by a displaceable piston sealed relative to said housing, and having a pump unit in which there rotates a conveying member connected to the other one of the rotatable parts, wherein a reservoir for a highly viscous fluid is provided in the housing, which reservoir is connected to the pump unit, wherein the pressure chamber is supplied by the pump unit and the piston loads the friction coupling and wherein the pump unit is provided in the form of an internally toothed rotor pump and the conveying member forms an externally toothed rotor which is concentrically connected to the other one of

Abstract: A torque-limiting clutch arrangement which comprises a cylindrical part (3) forming part of one clutch element and having shrink-fitted thereon a cylindrical sleeve (5) which forms part of the other clutch element. The clutch arrangement also includes a pump which when one clutch element (3) rotates relative to the other clutch element (5), when the torque on the clutch exceeds a given value, functions to pump oil into the domain of engagement between the cylindrical part (3) and the sleeve (5), so as to form a hydrostatic layer therebetween, the hydrostatic layer essentially negating the friction between the engagement surfaces while the relative movement continues.

Abstract: A lubricant delivering coupling adapted to interconnect a power transfer unit and a load having a rotary input. The coupling is comprised of a pair of concentrically disposed inner and outer hollow members. The outer member is in a torque transmitting relationship between the power transfer unit and the load. The inner hollow member is secured at both ends to an inner surface of the outer member and is adapted to receive lubricant from a lubricant source within the transfer device for delivery to and through the hollow inner member.The inner and outer members each have intermediate the respective ends thereof a shear section. Upon overloading of the outer member and the shearing failure thereof, the inner member continues to twist until rupture at the inner member shear section.

Abstract: A fail-safe device for preventing undesired rotation of the output as the result of bearing failure and seizure is shown according to the teachings of the present invention in its most preferred form for use with a clutch engagable in a single driving position. In its most preferred form, the output includes a hub portion which is rotatably mounted to the input of the clutch by a bearing. The output of the clutch further includes a collar portion for receipt upon the hub portion and forming a break away connection therebetween. The driven portion of selectively rotationally interrelating members of the clutch, i.e., teeth in the preferred embodiment shown, is located on the collar portion of the output. Under normal operation and without bearing failure, the collar and hub portions of the output have the same relative rotational position and rotate as a single unit.

Abstract: A combined variable speed viscous coupling and bearing includes a rolling element bearing that supports a driven member for relative rotation on a powered member. A viscous grease interposed and sealed with respect to the rolling elements of the bearing acts as a variable speed drive, frictionally retarding the rolling of the rolling elements when the powered member turns below a certain critical speed, thus causing the driven member to turn with the powered member in a one-to-one relationship. Above the predetermined critical speed, the rolling elements roll sufficiently through the viscous material to allow the powered member to overrun the driven member. In a preferred embodiment, the invention is disclosed as a variable speed drive for the cooling fan of a vehicle alternator.

Abstract: A normally lubricated bearing, typically a ball bearing, serves to transmit torque from a drive shaft for the fan wheel of an alternator. The driving and driven bearing surfaces form the coupling parts respectively on the drive side and the delivery side of the coupling. A cup spring is useful to control the bearing friction that must be overcome at a limiting speed at which the drive shaft begins to turn faster than the driven device. Such couplings are useful for engine fans, pumps, or other similar auxilary devices in motor vehicles.