Abstract: An electric motor operated kitchen appliance has a base unit having an electric motor and a preparation vessel, which can be connected to the base unit and into which a rotating element protrudes, which can be rotationally driven by means of the electric motor, wherein a grinding element, which, with a grinding area of a grinding vessel held on the preparation vessel, forms a grinder, can be connected to the rotating element. To advantageously further develop the kitchen appliance, the grinding element is connected to the rotating element via a coupling element having at least one elastic partial area.

Abstract: A torque transmission apparatus having a shift collar and a drive component. The shift collar may have a collar gear that may have a collar tooth that may have a concave collar tooth side surface that may be centered about a transverse collar tooth plane. The drive component may have a tooth that may have a convex lateral side surface centered about a transverse tooth plane. The concave collar tooth side surface may cooperate with the convex lateral side surface to align the transverse collar tooth plane with the transverse tooth plane.

Abstract: An engagement-type clutch mechanism is provided in which due to the movement of a first power transmission member, which is movably supported on a rotating shaft, toward a second power transmission member, a first and second projecting parts provided on opposing faces of a first and second power transmission members are engaged to each other, and the rotation of the second power transmission member is synchronized with the rotation of the first power transmission member, and due to the movement of a sleeve toward the synchronized second power transmission member, a first spline of the first power transmission member is linked to a second spline of the second power transmission member via a to-be-engaged spline of the sleeve, and the rotation of one of the rotating shaft and the second power transmission member is transmitted to the other of the rotating shaft and the second power transmission member.

Abstract: The invention relates to a system for the rotational decoupling of shafts, in particular drive shafts. The invention also relates to a generator protection system on a connection between a generator and a gas turbine engine. FIG. 1C illustrates the shaft-decoupling system in the decoupled position.

Abstract: An apparatus for axially adjusting a shifting element includes a shifting shaft, which can be rotated about an axis, an actuating body, which is connected to the shifting shaft for conjoint rotation and in an axially movable manner and which has at least two slotted guide sections designed as grooves on a peripheral surface, and a linear actuator, which is associated with the actuating body and has an actuatable actuator pin, which can engage in the slotted guide sections in order to axially move the actuating body. Each slotted guide section has an incoupling region for the actuator pin, an opposite outcoupling region for the actuator pin, and an adjusting region, which lies therebetween in the peripheral direction and is bent in a curved shape, for axially moving the actuating body. The incoupling region and the outcoupling region of the slotted guide sections that are adjacent in the peripheral direction are arranged at the same axial position.

Abstract: A power take-off unit includes a housing, an input mechanism mounted at least partially within the housing and configured for attachment to a source of rotational energy, and an output mechanism is configured for attachment to a driven accessory. The power take-off unit also includes a clutch assembly configured to selectively connect the output mechanism to the input mechanism. A pneumatic valve manifold is attached to the housing and is configured to provide pressurized air to the clutch assembly.

Abstract: According to an embodiment of the invention, a drive coupling for connecting to a drive is provided. The drive coupling is adapted to removably couple a load to a power source. The drive coupling includes a body and a plurality of components. The components are operably interconnected with each other. The components have a first arrangement in which the components transmit torque from the power source to the load and a second arrangement in which the components transmit no significant torque from the power source to the load. A first of the plurality of components is adapted to translate along its center of rotation relative to a second of the plurality of components from a first position in which the components define the first arrangement to a second position in which the components define the second arrangement.

Abstract: A connect-disconnect assembly for a vehicle drivetrain configured to drive a vehicle with a surface engaging traction member. The connect-disconnect assembly includes a coupler located within a final drive element or gear of a final drive assembly wherein in a first position the coupler does not span a gap between the gear and a transmission drive element of a transmission. In a second position, the coupler does span the gap between the gear and the transmission drive element such that the gear and the transmission drive element are connected. The final drive assembly includes an access port to provide access to a user accessible drive actuator to move the coupler between the first and second positions.

Abstract: A clutched device including an actuator and a clutch. The actuator can include a housing and a piston having a first, second, and third face. The first face and the housing can define a first chamber. The second face and the housing can define a second chamber. The second face can have a greater surface area than the first face. The third face and the housing can define a third chamber, isolated from the first and second chambers. A conduit can couple the first and second chambers. A vent can be coupled to the third chamber. A pump can pump fluid from a reservoir to the first chamber. A valve can selectively inhibit fluid communication between the second chamber and the reservoir. A shift element can be coupled to the piston for common translation and can move a clutch member between first and second positions.

Abstract: In a hydraulic system with a dog clutch (23-25), a hydraulically operated dog clutch actuator is arranged to alternatively bring the dog clutch into a connect mode or a disconnect mode. The clutch actuator has a piston (27) reciprocally movable under hydraulic pressure between two end positions, corresponding to the two clutch modes. Pressurized hydraulic oil is supplied to the clutch actuator by a hydraulic power system comprising a pump (4) driven by an electric motor (3). Means are provided in the clutch actuator to decrease the hydraulic pressure acting on the piston (27) at the approaching by the piston of either of its end positions, so that a hydraulic signal is transmitted back to the hydraulic power system.

Abstract: A gas turbine engine comprising an electrical machine 30, 130, 200, 210, the electrical machine 30, 130, 200, 210 having an axis of rotation that is canted with respect to the main rotational axis of the gas turbine engine.

Abstract: A gear shifting device, having a first, rotatably drivable transmission component, on which a shift element is arranged in a torque-proof and axially displaceable manner, which is axially movable into at least one shift position, in which the first transmission component is coupled in a torque-proof manner with a transmission component that is arranged adjacent to it and is connectable thereon, whereas an axial shift movement of the shift element into the at least one shift position and/or from this through the interaction of one shift pin is able to be triggered with at least one associated groove-like shift gate, which is designed to be changeable in an axial direction, at least in sections.

Abstract: A connect-disconnect assembly for a vehicle drivetrain configured to drive a vehicle with a surface engaging traction member. The connect-disconnect assembly includes a coupler located within a final drive element or gear of a final drive assembly wherein in a first position the coupler does not span a gap between the gear and a transmission drive element of a transmission. In a second position, the coupler does span the gap between the gear and the transmission drive element such that the gear and the transmission drive element are connected. The final drive assembly includes an access port to provide access to a user accessible drive actuator to move the coupler between the first and second positions.

Abstract: A controllable or selectable coupling assembly having an overrun mode and a retained control element is provided. The assembly includes first and second coupling members having first and second coupling faces, respectively, in close-spaced opposition with one another. A locking member is disposed between the coupling faces of the coupling members. The locking member is movable between first and second positions. A control element is mounted for controlled movement between the coupling faces and is operable to control position of the locking member. The control element has at least one opening which extends completely therethrough to allow the locking member to extend therethrough. A retainer mechanism is operative to allow limited movement of the control element towards the first coupling face and prevent the control element from contacting the first coupling member in the overrun mode thereby reducing spin losses when the assembly is disengaged.

Abstract: A dog clutch control apparatus for an automated transmission includes a dog clutch transmission mechanism including a clutch ring, a clutch hub, a sleeve, an axial driving device, a dog clutch portion, a stroke position sensor, and a spline of the sleeve including high teeth and a low tooth, the dog clutch portion including clutch front teeth and clutch rear teeth, wherein in a rotation adjustment range, a control apparatus controls a thrust load of the axial driving device so that a first thrust load is applied to the sleeve, and the first thrust load generates a relative rotation between the sleeve and the dog clutch portion against a frictional force generated by contact between an end surface of each of the high teeth and a front end surface of each of the clutch rear teeth.

Abstract: An axle assembly having a clutch collar. The clutch collar is moveable between a first position in which the clutch collar couples the spider housing to the hub and a second position in which the clutch collar decouples the spider housing from the hub.

Abstract: A shaft connection structure connects a pair of rotating shafts by a fit between a pair of spline shafts, wherein the pair of rotating shafts are provided with corresponding ones of the pair of spline shafts. The shaft connection structure includes a shaft connection assist device. The shaft connection assist device includes a centering ring and centering pins. The centering ring is arranged outside of a first one of the spline shafts and coaxially with the first spline shaft. The centering pins are provided outside of a second one of the spline shafts. The centering pins engage with an outer peripheral surface of the centering ring and bring a shaft axis of the first spline shaft and a shaft axis of the second spline shaft into a range enabling the fit therebetween.

Abstract: A connecting device (1) for the rotationally fixed connection of first and second shafts (2, 3) that can rotate relative to one another. The connecting device (1) comprises an axially movable connecting element (5) designed such that, in a first axial position (A), the connecting element (5) forms an interlock between the first and second shafts (2, 3) and, in a second axial position (B), the connecting element (5) releases the interlock. The connecting device (1) also comprises an actuating system (6, 8, 9, 10, 11) for moving the connecting element between the first and second axial positions (A, B) and a stop (16) which limits the axial movement of the connecting element (5) in the first or second axial position (A, B). An impact damper (17) is provided for the stop (16) in order to reduce annoying noise when the connecting element (5) strikes against the stop (16).

Abstract: A dog clutch for an automated transmission includes a rotary shaft rotatably connecting to one of an input shaft and an output shaft of the automated transmission, a clutch ring rotatably supported by the rotary shaft and rotatably connecting to the other of the input shaft and the output shaft, a clutch hub fixed to the rotary shaft, a sleeve including first teeth and second teeth, an axial driving device moving the sleeve, and a dog clutch portion arranged at the clutch ring, the dog clutch portion including: clutch forward teeth each having an engagement portion contactable with each of the first teeth, and inclined surfaces extending from the engagement portion toward both sides in a circumferential direction and inclined toward a rear end position of the dog clutch portion; and a clutch rearward tooth portion engageable with the second teeth and including clutch rearward teeth.

Abstract: A dog clutch having a sliding internally toothed annular power transmitting collar gear (41) which can reciprocatingly slide coaxially to engage and disengage a driving shaft portion (22) from a load shaft (9). The temporarily engaged shaft (22) and collar gear (41) have cooperative teeth (42,36) in which there is a first set of teeth having a given axial length and a second interleaved set having a shorter length. The collar gear is sandwich between a pair of abutting ring-shaped pistons (51,52) within a housing cylinder. Pressurized fluid in either chamber of the cylinder drives the pistons to slide axially. Such a dog clutch mechanism is particularly suited to disengagingly couple a power takeoff (PTO) to an hydraulic pump on a commercial vehicle such as a waste disposal truck.

Abstract: The clutch device comprises a first clutch element and a second clutch element, which are each supported in a rotational manner on a common axis of rotation. In an engaged state, the clutch elements are coupled to one another in a form-locking manner by a sliding sleeve. The sliding sleeve is attached to the first clutch element in a rotationally fixed and axially displaceable manner. A peripheral surface of the sliding sleeve is provided with at least one step, having a first step flank and extending with a first step course on the peripheral surface of the sliding sleeve, wherein the first step course also has, at least in sections, at least one axial directional component in the direction of the axis of rotation. A placement agent can be displaced radially back and forth between an engaging placement agent position and a disengaging placement agent position, and is otherwise stationary.

Abstract: The invention relates to a concealing device for the separable connection of the at least one loose drum rotatably mounted on the main shaft (11) of a conveyor machine to the main shaft (11), wherein the separable connection of the loose drum to the main shaft (11) is positively realised by means of a guided coupling wheel (3a, 3b) that is engageable and disengageable by actuating devices (7). The guidance of the coupling wheel (3a, 3b) is arranged on the sides of the loose drum.

Abstract: An arrangement for shifting a gearbox. The arrangement having first and second transmission components (14) and an axially movable shifting sleeve (17) such that the shifting sleeve (17) and the second transmission component (14) each have respective drive teeth (14a, 17a) that can be brought into engagement with one another. The drive teeth are in the form of beveloid teeth (14a, 17a).

Abstract: A clutch mechanism used in a system in which first and second driven members are driven using one driving source. The mechanism includes a driving member, a driving side engaging member, an idler side engaging member, an urging unit, a releasing member provided with a cam surface configured to cause the driving side engaging member to move axially, and to perform engagement or release of the driving side engaging member with or from the idler side engaging member, and a cam member provided with a cam surface configured to engage with the cam surface of the releasing member. In at least one of the releasing member and the cam member, at least a portion where collision occurs when the releasing member has moved in an axial direction to approach the cam member, is formed of an elastic member.

Abstract: A claw clutch includes first and second rotors disposed coaxially with each other, and is switched between an engaged state engaging teeth of the rotors and a disengaged state releasing the engagement. An actuator moves either one of the rotors in an axial direction to switch the clutch between the states. A synchronization controlling unit controls an electric motor coupled to the second rotor to cause its rotation number to approach the rotation number of the first rotor when the clutch is switched to the engaged state. An engagement controlling unit that controls the actuator moves either one of the rotors to a position where the teeth are engaged before a difference in rotation speed between the rotors falls within a predetermined range and the rotation number of the second rotor reaches that of the first rotor when the clutch is switched to the engaged state.

Abstract: A clutch mechanism used in a system in which first and second driven members are driven using one driving source. The mechanism includes a driving member, a driving side engaging member, an idler side engaging member, an urging unit, a releasing member provided with a cam surface configured to cause the driving side engaging member to move axially, and to perform engagement or release of the driving side engaging member with or from the idler side engaging member, and a cam member provided with a cam surface configured to engage with the cam surface of the releasing member. In at least one of the releasing member and the cam member, at least a portion where collision occurs when the releasing member has moved in an axial direction to approach the cam member, is formed of an elastic member.

Abstract: A driving force transmission apparatus includes: a housing having an inner peripheral spline portion; an inner shaft having an outer peripheral spline portion; a main clutch including first outer and inner clutch plates respectively engaged with the inner and outer peripheral spline portions; a cam mechanism generating pressing force for pressing the main clutch by relatively rotating a pair of cam members; and an electromagnetic clutch mechanism including an armature engaged with the inner peripheral spline portion and applying rotation force to the cam mechanism for relatively rotating the cam members through energization of an electromagnetic coil. An end face facing the armature is formed in the inner peripheral spline portion between a first region engaged with the first outer clutch plate and a second region engaged with the armature. Movement of the armature toward the first region is regulated by contact of the armature with the end face.

Abstract: A synchronizing device of a manual transmission may include a clutch hub splined on a rotation shaft, a sleeve engaged to an external circumferential portion of the clutch hub by interposing a blocking key therebetween, the sleeve being movable axially, a clutch gear having a cone portion and disposed at both sides of the sleeve without an interference with the rotation shaft, a blocker ring frictionally engagable to the cone portion of the clutch gear, and a normal gear and a groove gear formed at an interior circumference of the sleeve, wherein a width of a middle portion of the groove gear may be wider than that of the normal gear, and the middle portion of the groove gear has a key supporting portion and a locking groove formed on the key supporting portion and engaged to an exterior circumference of the blocking key.

Abstract: A coupling and control assembly includes a coupling subassembly and a control subassembly integrated with the coupling subassembly. The control subassembly has a reciprocating member and actuators operatively connected to the reciprocating movement for controlled reciprocating movement therewith to move or pivot respective struts received within pockets of a coupling member of the coupling subassembly. The reciprocating member converts a pressure of a working fluid at its working face to move linearly together with the actuators from its first position which corresponds to a first operating mode of the coupling subassembly to its second position which corresponds to a second operating mode of the coupling subassembly.

Abstract: A clutch assembly, including: a hub including a first radially disposed portion with a plurality of circumferentially aligned slots passing though the first radially disposed portion; and a ring gear carrier including a plurality of protrusions disposed in the plurality of circumferentially aligned slots and in compressive engagement with the hub to fixedly connect the hub to the carrier. Each slot in the plurality of circumferentially aligned slots extends further in a circumferential direction than in a radial direction. Each protrusion in the plurality of protrusions extends further in the circumferential direction than in the radial direction.

Abstract: A dog clutch for an automated transmission includes a rotary shaft rotatably connecting to one of an input shaft and an output shaft of the automated transmission, a clutch ring rotatably supported by the rotary shaft and rotatably connecting to the other of the input shaft and the output shaft, a clutch hub fixed to the rotary shaft, a sleeve including first teeth and second teeth, an axial driving device moving the sleeve, and a dog clutch portion arranged at the clutch ring, the dog clutch portion including: clutch forward teeth each having an engagement portion contactable with each of the first teeth, and inclined surfaces extending from the engagement portion toward both sides in a circumferential direction and inclined toward a rear end position of the dog clutch portion; and a clutch rearward tooth portion engageable with the second teeth and including clutch rearward teeth.

Abstract: The present invention provides a swivel sub for connection in a work string between a workstring and a downhole apparatus. The swivel sub includes a first substantially cylindrical body, including a sleeve portion having one or more teeth and a second substantially cylindrical body being partially located within the sleeve portion. The bodies are arranged to rotate relative to each other. The swivel sub also includes a sliding sleeve, having one or more teeth arranged mutually engage with the first teeth is axially moveable between disengaged and engaged positions, in one embodiment by a pressure differential being created in the sub. Further, the present invention provides methods for of running the tool, with particular application to setting and hanging of liners and screens.

Abstract: A transmission having at least one shaft, on which a guide sleeve which has a first external toothing system is arranged fixedly so as to rotate with it and at least one slider sleeve which has an internal toothing system is arranged, it being possible to adjust the slider sleeve between a disengaged position, in which the internal toothing system and a second external toothing system on a clutch element are not operatively connected, and an engaged position, in which the internal toothing system meshes with the second external toothing system. The internal toothing system and/or the first external toothing system are/is configured in such a way that there is merely punctiform contact between them in the engaged position. As a result, in particular, an undesired gear disengagement can be suppressed.

Abstract: The clutch device comprises a first clutch element and a second clutch element, which are each supported in a rotational manner on a common axis of rotation. In an engaged state, the clutch elements are coupled to one another in a form-locking manner by a sliding sleeve. The sliding sleeve is attached to the first clutch element in a rotationally fixed and axially displaceable manner. A peripheral surface of the sliding sleeve is provided with at least one step, having a first step flank and extending with a first step course on the peripheral surface of the sliding sleeve, wherein the first step course also has, at least in sections, at least one axial directional component in the direction of the axis of rotation. A placement agent can be displaced radially back and forth between an engaging placement agent position and a disengaging placement agent position, and is otherwise stationary.

Abstract: An actuator arrangement for the axial displacement of an actuation member by means of a drive force which is generated by an electric machine, in particular for a shift-clutch arrangement of a multi-step gear change transmission. The actuation member is mounted axially displaceably on a rotary shaft. The electric machine has a stator fixed to a housing and a rotor which is coupled to the actuation member and is arranged coaxially with respect to the actuation member. The rotor is coupled to the actuation member with a form fit in the axial direction. Here, the rotor or the actuation member has a radial projection which engages into a radial groove of the other part.

Abstract: A clutch arrangement (10) for a motor vehicle transmission (80) is proposed for connecting a shaft (12) to a rotational element (14), in particular to a freely moving wheel (14), which is mounted thereon, wherein the clutch arrangement (10) has: a sliding sleeve (22) which is connected in a rotationally fixed fashion to the shaft (12) and is mounted in an axially displaceable fashion on the shaft (12) between a closed position and an open position and has a first sliding toothing (24); a clutch element (26) which is connected in a rotationally fixed fashion to the rotational element (14) and has a second sliding toothing (28) into which the first sliding toothing (24) can be inserted axially in the closing direction (30) in order to connect the rotational element (14) to the shaft (12) in the closed position; and an actuator arrangement (40) for axially sliding the sliding sleeve (22).

Abstract: An integrated wheel end which includes a movable clutch ring for selective engagement between an engaged and disengaged position for transferring driving torque from a drive shaft to the wheel end. The integrated wheel end incorporates a clutch ring abutment feature or travel limiter configured to position the movable clutch ring relative to a coupler on the wheel end during assembly with the drive shaft.

Abstract: An interlocking system for a shaft-hub connection comprising a shaft element having an exterior toothing, a hub element having an interior toothing, wherein to interlock the shaft element and the hub element a ring gear having a toothing is provided, and wherein in an interlocked condition the toothing of the ring gear is arranged to be offset by an angle relative to the interior toothing of the hub element and/or relative to the exterior toothing of the shaft element.

Abstract: The present invention provides a swivel sub for connection in a work string between a workstring and a downhole apparatus. The swivel sub includes a first substantially cylindrical body, including a sleeve portion having one or more teeth and a second substantially cylindrical body being partially located within the sleeve portion. The bodies are arranged to rotate relative to each other. The swivel sub also includes a sliding sleeve, having one or more teeth arranged mutually engage with the first teeth is axially moveable between disengaged and engaged positions, in one embodiment by a pressure differential being created in the sub. Further, the present invention provides methods for of running the tool, with particular application to setting and hanging of liners and screens.

Abstract: A releasable drive connection includes a ring including teeth angularly spaced about an axis, and grooves, each groove formed in an axial end of the ring and aligned angularly with a space between consecutive ring teeth; and a sleeve supported for axial movement, including first teeth angularly spaced about the axis, engageable with the ring teeth, each first tooth having a first length; and second teeth, each second tooth aligned with one of the first teeth, having an axial length shorter than the first length, and including a pointed end for engaging one of the grooves and permitting the first tooth to extend between and engage consecutive gear teeth.

Abstract: A synchromesh device for a transmission includes: a shaft; a sleeve; an idler gear; a gear piece; a synchronizer ring; a first spline, a second spline and a third spline, the first spline of the sleeve being engageable with each of the second spline of the gear piece and the third spline of the synchronizer ring; and a first chamfer, a second chamfer and a third chamfer, formed at one end of the first spline, one end of the second spline and one end of the third spline, respectively, for a spline-engagement and for a thrust-through operation. The first chamfer of the sleeve includes a small-diameter side thrusting through the third chamfer at the time of shifting and a large-diameter side thrusting through the second chamfer at the time of shifting. A chamfer angle of the large-diameter side is smaller than a chamfer angle of the small-diameter side.

Abstract: A quick disconnect coupling including a first hub, a shaft fixedly connected to the first hub, the shaft being non-round in cross-section, and a second hub having a non-round recess extending therethrough, the non-round recess being sized to closely receive the shaft such that the second hub is capable of sliding along the shaft and is prevented from rotating about the shaft, wherein rotation of the first hub results in corresponding rotation of the second hub.

Abstract: A system is provided for preventing gear hopout in a tooth clutch in a vehicle transmission, the tooth clutch including an engaging sleeve having sleeve clutch teeth. The tangent function for at least one of driving back-taper angle and braking back-taper angle is larger than the average value of clutch coefficient of friction and spline coefficient of friction multiplied by the sum of unity and the ratio of clutch teeth pitch diameter and spline teeth pitch diameter.

Abstract: An axle disconnect system for selectively connecting or disconnecting a wheel-side shaft and a differential-side shaft having a common axis of rotation in a drivetrain of a motor vehicle. In the axle disconnect an output gear is splined to the wheel-side shaft on an outside diameter of the wheel-side shaft, and a translatable collar is splined to the output gear on an outside diameter of the output gear. The collar is arranged to be translated along the common axis of rotation for splined connection with the differential-side shaft while retaining the splined connection with the output gear.

Abstract: A driving force interrupting mechanism includes input and output members. A coupling sleeve is to be movable on the input and output members along a rotational axis. A fork is swingable around a swing shaft to move the coupling sleeve between a connecting position and a disconnecting position. The coupling sleeve is positioned on both of the input and output members in the connecting position. The coupling sleeve is positioned on either the input member or the output member in the disconnecting position. An operating member is integrally rotatable with the swing shaft. A spring is provided on the swing shaft between the operating member and the fork relatively rotatably with respect to the swing shaft. A motion of one of the operating member and the fork follows a motion of another of the operating member and the fork via an elastic force of the spring.

Abstract: A vehicle stabilizer bar assembly having a pair of stabilizer bar members that are selectively uncoupled via a clutch. The clutch includes a moving element that can be selectively moved via an actuator to effect the uncoupling of the stabilizer bar members. The actuator is configured to apply a force to the moving element concentrically about the axis along which the moving element translates. The clutch is configured to transmit torque from one of the stabilizer bar members to the other stabilizer bar member concentrically about the axis. A method for operating a vehicle stabilizer bar assembly is also provided.

Abstract: A modularly designed mechanical or pressure activated power coupling and complete disconnect assembly independently mounted or directly coupled to a bell housing mount on a drive engine or powered side equipment has provisions for coupling the driveline power via an integrated torsional coupling, drive plate or other mechanism to the rotating member, engine, and powered side equipment.

Abstract: A coupling element, for example a coupling sleeve (1), having coupling teeth (2) which, over a part (2a) of their length, have a gradually diminishing cross-sectional profile, a so-called back rake. Over the part, the coupling teeth have a portion (7b) nearest the tooth root having a first pressure angle, which portion connects to a portion (7b) extending to the tooth tip and having a greater pressure angle than the former portion.

Abstract: A coupling apparatus includes an inner shaft rotatably driven about a longitudinal axis of rotation, an outer shaft concentric with the inner shaft for selective rotation about the longitudinal axis, a coupling element movable between a first position engaging the inner shaft to the outer shaft for rotation therewith, and a second position disengaging the inner shaft from the outer shaft for relative rotation therebetween, and an actuating element connected to the coupling element and operable to move the coupling element between the first position and the second position.

Abstract: The invention provides a lock mechanism and method for selectively coupling two concentric shafts rotatable about a common axis. The lock mechanism includes a locking ring assembly movable along an axis of rotation of two rotatable shafts between a locked position to transmit rotation between the two shafts and an unlocked position. The lock mechanism also includes a first locking portion extending radially from the locking ring assembly and circumferentially about the axis of rotation for engaging a first of the two shafts. The lock mechanism also includes a second locking portion extending radially from the locking ring assembly opposite the first locking portion and circumferentially about the axis of rotation for engaging a second of the two shafts.