Abstract: A power tool including a drive, and a planetary gear speed reducer reducing the speed of rotation transmitted from the drive. The planetary gear speed reducer has a positioning ball between a first sun gear and a second sun gear. The first sun gear has an annular engagement portion smaller in diameter than the positioning ball, and the second sun gear has a ball-retaining recess accommodating at least half of the positioning ball and retaining the positioning ball at a position on a rotation axis of the second sun gear. The ball-retaining recess has a bottom surface substantially perpendicular to the rotation axis and a cylindrical inner surface to retain the positioning ball at a point on the rotation axis. A gap is formed between the first sun gear and the second sun gear when the positioning ball is sandwiched between the annular engagement portion and the bottom surface.

Abstract: A torque limiting tool is described. The tool comprises a torque limiting mechanism comprising a sleeve connectable to a drive shaft and a torque drive coupler that resides within a housing. The sleeve comprises a sleeve annular sidewall having a plurality of outwardly projecting elongated first lobes and recessed first grooves that are circumferentially positioned along the length thereof. The drive coupler comprises a socket defined by a coupler annular sidewall having a plurality of outwardly projecting second elongated lobes and recessed second grooves positioned along the coupler interior sidewall. Torque is transferred therebetween when the ramped surfaces of the first and second lobes mate within respective second and first grooves of the coupler and sleeve. When a torque limit is exceeded, the first and second lobes of the sleeve and coupler disengage for their respective second and first grooves.

Abstract: A diaphragm pump may comprise a housing defining a first pumping chamber, a second pumping chamber, and a hydraulic fluid chamber, a first flexible diaphragm separating the first pumping chamber from the hydraulic fluid chamber, a second flexible diaphragm separating the second pumping chamber from the hydraulic fluid chamber, a rod mechanically linking the first flexible diaphragm and the second flexible diaphragm such that an expansion of one of the first and second flexible diaphragms exerts a contraction force on the other of the first and second flexible diaphragms, and a piston disposed within the hydraulic fluid chamber and configured to reciprocate to cause a hydraulic fluid contained within the hydraulic fluid chamber to alternately exert an expansion force on the first and second flexible diaphragms.

Abstract: An overload limiting device includes: a rolling element; a rotatable first rotation member having a housing portion that houses the rolling element; a rotatable second rotation member having an engagement recess portion that engages detachably with the rolling element housed in the housing portion, the second rotation member being arranged opposing the first rotation member; a biasing member that biases the rolling element toward the engagement recess portion; and an adjustment nut that adjusts a biasing force of the biasing member by moving in a rotation axis direction of the first rotation member, the adjustment nut being provided to the first rotation member, the first rotation member including a scale showing a position of the adjustment nut in the rotation axis direction.

Abstract: Apparatus directed to the art of disengaging an input from an output at predetermined torque values. A torque limiting clutch capable of use as a solid drive unit and a torque limited unit for which the torque disengagement value is selectable. The torque limiting clutch has an overload assembly and a torque drive mechanism which may comprise a plurality of drive pins. Additionally, the torque limiting clutch may comprise seals to discourage contaminants from entering the clutch.

Abstract: A compensation device configured to be positioned between a robotic arm and a robotic tool. The device may be configured to directly attach to the tool, or may be configured to be positioned away from the tool. The device generally includes a first section that connects to the robotic arm and a second section that connects to the tool. The second section is movable relative to the first section to provide for the tool to be positioned at various orientations. The second section may comply rotationally about a first axis. The second section may be movable in a second plane. In one embodiment, the second plane is perpendicular to the first axis.

Abstract: A torque limiter includes a shaft member, and a cylindrical member which is fitted rotatably on the shaft member. When the cylindrical member is rotated relative to the shaft member in such a state that the cap member is not screwed in the threaded hole and in such a state that the oil release passage is not opened to the outside, the other end portion of the oil release passage circumferentially moves within the circumferentially extended groove while being spaced apart from the circumferentially extended groove.

Abstract: An actuator decoupler for selectively coupling and decoupling a driving part and a driven part of an actuation system is disclosed. The driving part can be coupled to the actuator decoupler, and the actuator decoupler can be coupled to the driven part via at least one coupling pin. In a selectively coupled state, the driven part can be at least one of rotationally and longitudinally fixed to the actuator decoupler and, thereby, the driving part. The actuator decoupler can be decoupled from the driven part through the use of a preloaded energy mechanism configured to disengage the at least one coupling pin from the driven part. Thereby, the actuator may be responsive to a jam in the actuation system to selectively decouple the driven part from the actuator decoupler and the driving part so that the driven part has freedom to translate at least one of rotationally and longitudinally.

Abstract: A disconnect assembly for an integrated drive generator includes an input shaft configured to receive a rotational input. A coupling member is selectively coupled to the input shaft by dog teeth. A biasing element is configured to disconnect the dog teeth and decouple the coupling member from the input shaft. A thermal coupling opposes the biasing element to maintain engagement between the dog teeth in an unmelted state. The thermal coupling is constructed from a eutectic solder material of 91.3% tin and 8.7% zinc by weight.

Abstract: A breakable coupling device for coupling together first and second main transmission shafts stationary in translation along a longitudinal axis of rotation of the device comprises a blocking device having a discontinuous first housing and a continuous second housing forming a closed loop; a compression device; at least one drive device connecting the blocking device and the compression device together in rotation about the longitudinal axis below a predetermined torque, wherein the discontinuous first housing is configured to receive the at least one drive device below the predetermined torque; and a shifting device configured to shift the at least one drive device non-reversibly from the discontinuous first housing towards the continuous second housing when the torque exerted on the at least one drive device is greater than the predetermined torque.

Abstract: A length of each pocket of a cage in a circumferential direction is smaller than the sum of an outer diameter of a roller and a free length of a coil spring. The cage can rotate relative to an inner ring having cam surfaces in accordance with revolution of the rollers in an overload-applied condition, and the cage can not rotate in a direction opposite to a direction of revolution of the rollers in the overload-applied condition.

Abstract: A power transmission apparatus comprises a pulley mounted rotatably on a casing of a rotary device, a hub coupled to the pulley by fitting between depressions and protrusions, a power shutoff member for preventing excessive torque between a rotary shaft and the hub, and an engaging device for engaging the hub and the pulley each other. The engaging device includes a first stepped portion formed radially on the outer periphery of the hub and a second stepped portion formed radially on the inner peripheral wall of a rim of the pulley in such a manner as to engage the first stepped portion in the axial direction.

Abstract: A torque overload clutch for an electrical power tool, such as a percussion hammer drill, is provided. The clutch is accommodated in a cavity in a gear cog. Spring washers are used to urge ball bearings into indentations formed in the base of the cavity. The ball bearings are accommodated in cavities formed in a drive plate which engages with the spindle drive of the power tool. The spring washers are held in position by a circlip or a threaded plate. The threaded plate arrangement provides means for compressing the spring washers with a consistent force across a manufactured batch. A method of manufacturing the clutch is also disclosed.

Abstract: A flight control surface actuator includes a mechanism that enables the actuator translation member to be selectively decoupled from the actuator rotating member. The actuator includes an actuation member, a translation member, an extension member, and a locking member. The actuation member is adapted to receive a drive force and is configured, in response to the drive force, to rotate and cause the translation member to translate. The extension member surrounds at least a portion of the translation member and is configured to be selectively coupled to, and decoupled from, the translation member. The locking member surrounds at least a portion of the extension tube and is movable between a lock position, in which the locking member couples the extension member to the translation member, and a release position, in which the locking member decouples the extension member from the translation member.

Abstract: A power transmission for a compressor includes a driven member rotable by an engine. The power transmission includes a drive member rotable coaxially with the driven member to rotate a shaft of a compressor for regulating displacement of the compressor. The power transmission includes a link interconnecting the driven member and the drive member with each other in a crossing direction relative to the drive shaft. The link is disengageable from one member of the driven member and the drive member.

Abstract: A torque fuse device having a bi-directional release mechanism that releases the torque carrying capability of the shafts upon torque overload is provided. The torque fuse device includes a sleeve, a hub positioned within the sleeve, and a hydraulic torque coupler. The sleeve and the hub are adapted to be coupled with two axially aligned shafts. The hub includes a feedback ring having at least one tooth formed therein. The hydraulic torque coupler includes a piston, a cylinder and a collet. The piston is positioned between the collet and the feedback ring and slides along an inclined surface of collet. One ore more fuse pins are selectively positioned between the tooth, the piston and the cylinder to frictionally engage the sleeve to the hub. Upon a torque overload condition, the pins release from the teeth thereby releasing the torque carrying capability of the shafts.

Abstract: An automatic reduction-ratio changing apparatus comprises a planetary gear mechanism including a sun gear, planet gears, and an internal gear. When a load, which exceeds a predetermined torque, is applied to the internal gear, a pawl of a lock lever is engaged with a ratchet section of a housing to stop the rotation of the internal gear and lock the internal gear. When a displaceable member of an actuator is displaced from an outward route to a homeward route, the rotation of a motor is reversed, and an input shaft and a cam are rotated in a reverse direction to release from the locked state. Accordingly, the speed reduction ratio, which is transmitted from an output shaft to the actuator, is automatically switched.

Abstract: A torque fuse device having a bi-directional release mechanism that releases the torque carrying capability of the shafts upon torque overload is provided. The torque fuse device includes a sleeve, a hub positioned within the sleeve, and a hydraulic torque coupler. The sleeve and the hub are adapted to be coupled with two axially aligned shafts. The hub includes a feedback ring having at least one tooth formed therein. The hydraulic torque coupler includes a piston, a cylinder and a collet. The piston is positioned between the collet and the feedback ring and slides along an inclined surface of collet. One ore more fuse pins are selectively positioned between the tooth, the piston and the cylinder to frictionally engage the sleeve to the hub. Upon a torque overload condition, the pins release from the teeth thereby releasing the torque carrying capability of the shafts.

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 drive assembly, especially for agricultural implements with rotatingly driven masses, has a shear pin coupling (1) with a coupling hub (3) and a coupling sleeve (12) rotatable relative to the coupling hub (3). A ratchet gear (20) supported on the coupling hub (3) and rotatable relative to the coupling hub (3) and the coupling sleeve (12). All three components (3, 12, 20) are connected to one another by the head screw (26) constituting the shear pin. A ratchet (not illustrated) may engage a holding face of the ratchet gear (20). This results in the head screw (26) being sheared. As a result, the coupling sleeve (12) is disconnected from the coupling hub (3) in respect of drive.

Abstract: An engaging projection is engaged with an engaging recess to connect a pulley and a receiving member to each other so that power is transmitted. The engaging recess deforms with respect to the pulley and the receiving member. During the power transmission between the pulley and the receiving member, an elastic member permits engaging recess to deform, thereby enabling the pulley to rotate relative to the receiving member in a predetermined angular range. In this state, the engaging projection normally abuts against a sliding surface of the engaging recess at a neutral position, and the contact position of the engaging projection and the engaging recess separates from the neutral position in accordance with the increase of the load on the receiving member. As the contact position separates from the neutral position, the inclination angle of the sliding surface with respect to the circumferential direction of the rotary bodies gradually increases.

Abstract: A torque limiting mechanism for transmitting power from an external drive source to the drive shat of a compressor. A pulley, which is coupled to the external drive source, has elastic members. A hub, which is attached to the drive shaft, has engaging portions. A coupler member is located between the pulley and the hub. The coupler member is engaged with the elastic members and with the engaging portions such that power is transmitted from the pulley to the hub. The urging members urge the coupler member such that the coupler member is disengaged from the engaging portions. When power is transmitted from the pulley to the hub, the elastic members maintain the coupler engaged with the elastic members and the engaging portions. When load generated due to power transmission exceeds a predetermined level, the elastic members are deformed such that the coupler member is disengaged from the elastic members. When disengaged from the elastic members, the coupler member is disengaged from the engaging portions.

Abstract: A safety device for a torque limiter composed of an external body, which is rigidly coupled to the driving shaft for transmitting motion to a working implement and inside which there is a seat for accommodating an internal body which is rigidly coupled to the driven motion transmission shaft and is provided with a series of radial sliding seats for corresponding tabs which can move, in contrast with elastic elements, alternatively between a centrifugal position providing engagement and transmission in corresponding slots formed in the external body and a centripetal position for disengagement from the slots and for stopping the transmission; the movement is activated by means of a corresponding centered plate which forms a protruding ring for wedging and centrifugally pushing the tabs and provides for the in-line interposition, between the internal body and the plate, of pushers for axially pushing the plate into the configuration for forced disengagement from the tabs.

Abstract: A compressor for an air conditioning system in an automobile, having a housing (1) and a compressor unit (2) accommodated in the housing (1) for taking in and compressing a refrigerant. The refrigerant flows from an intake area (4) preferably in a front-end housing cover (3) through the compressor unit (2) into a discharge area (5), preferably likewise designed and constructed in the housing cover (3). The compressor is designed and constructed for promoting efficiency such that components coming into contact with the refrigerant, particularly the walls forming a flow path (6) between the intake area (4) and the discharge area (5) are thermally insulated against the refrigerant at least partially and in areas of contact. For an effective protection of the drive belt when the drive shaft or the compressor unit locks, the compressor is further designed and constructed such that a coupling device automatically disengages, when a defined thermal and/or mechanical load limit is exceeded.

Abstract: A power transmission has a drive side rotatable member having a plurality of tapered radial concave portions with each having a pair of tapered surfaces. The plurality of tapered radial concave portions are disposed in a radial direction along a radial axis of the drive side rotatable member. A driven side rotatable member is connected to a rotary shaft and has a plurality of radial and axial concave portions disposed in a radial direction along a radial axis of the driven side rotatable member. A plurality of balls are each moveable between each of the plurality of tapered radial concave portions and each of the plurality of radial and axial concave portions. A spring is provided on the driven side rotatable member. Further, a ring having an inclined surface is urged by the spring, whereby the ring presses each of the plurality of balls at a point at which the inclined surface is formed.

Abstract: A torque limiting mechanism for transmitting power from an external drive source to the drive shat of a compressor. A pulley, which is coupled to the external drive source, has elastic members. A hub, which is attached to the drive shaft, has engaging portions. A coupler member is located between the pulley and the hub. The coupler member is engaged with the elastic members and with the engaging portions such that power is transmitted from the pulley to the hub. The urging members urge the coupler member such that the coupler member is disengaged from the engaging portions. When power is transmitted from the pulley to the hub, the elastic members maintain the coupler engaged with the elastic members and the engaging portions. When load generated due to power transmission exceeds a predetermined level, the elastic members are deformed such that the coupler member is disengaged from the elastic members. When disengaged from the elastic members, the coupler member is disengaged from the engaging portions.

Abstract: A drive power transmission apparatus including a torsionally deformable spring capable of being torsionally deformed so as to permit a relative rotation between a rotor element and a drive shaft in response to a change in a load torque appearing in a drive-power-receiving unit, a releasing element operable to move the free outer end of the torsionally deformable spring from the power transmitting face of the rotor element when the relative rotation between the rotor element and the drive shaft increases due to an increase in the load torque beyond a predetermined limiting torque, and a mechanical elevation arranged in the rotor element for permitting the free outer end of the torsionally deformable spring to ride thereon to thereby promote separation of the spiral spring from the rotor element in order to interrupt the transmission of drive power.