Abstract: A drive system with full surface drive contact. The drive system tends to maximize the surface contact pattern or area at typical bit-recess reaction (drive) torque values, thereby tending to minimize bit-recess surface contact stresses, coating damage, recess ream and premature bit fatigue failure.

Abstract: A clutch assembly and a torque converter assembly having a clutch assembly, for an automotive transmission, are provided. The clutch assembly includes a clutch plate and a piston or pressure plate configured to selectively engage the clutch plate, the piston being movable between an applied position and a released position. An annular seal is disposed adjacent to the piston, wherein movement of the piston and hydraulic pressure causes the annular seal to move between a sealed position and an open position.

Abstract: A transmission synchronizer includes a lower key that is installed to be slidable with respect to a hub in a radial direction of the hub and an upper key that is installed on an exterior of the lower key, the upper key being slidable in an axial direction of the hub. Additionally, a sleeve is installed at an exterior of the hub to slide the upper key in the axial direction while the sleeve slides in the axial direction, to pressurize the upper key toward a synchro ring. A key spring installed between the lower key and the hub to pressurize the lower key and the upper key toward an inner surface of the sleeve.

Abstract: A transmission includes a case defining a bore and a piston disposed within the bore. The piston and the case define a fluid chamber in fluid communication with a fluid source. The piston includes an annular piston body defining a plurality of auxiliary bores angularly spaced along the annular piston body about a central axis of the annular piston body. The piston further includes a plurality of auxiliary pistons disposed within the auxiliary bores. The piston body and the auxiliary pistons have rear surfaces in communication with the fluid chamber. The transmission further includes a clutch pack disposed opposite the piston from the fluid chamber. The clutch pack includes at least one friction plate, at least one separator plate, and at least one separator spring. The transmission further includes a return spring adapted to bias the annular piston body in a direction away from the clutch pack.

Abstract: A clutch includes an outer race including pawls each having first and second arms and an inner race including teeth engageable with the pawls. A cage is radially disposed between the inner and outer races and is rotatable relative to the pawls to switch the clutch between a one-way mode and a fully locked mode. The cage includes ramps each configured to urge an associated one of the first arms into engagement with the teeth when the cage is in a first rotational position to put the clutch in the fully locked mode and resilient members each configured to urge an associated one of the second arms into engagement with the teeth when the cage is in a second rotational position to put the clutch in the one-way mode.

Abstract: An assembly (1) for a disc brake caliper (100), in which, when said caliper (101) is arranged astride a disc (3) of a disc brake (100) having a defined rotation axis (C), said assembly (1) defines an axial direction (X-X) parallel to said rotation axis (C), a radial direction (R-R) orthogonal to said axial direction (X-X) and a tangential or circumferential direction (T-T) orthogonal to both the axial direction (X-X) and the radial direction (R-R), said assembly (1) comprises: a first pad (10) comprising a friction material (12), defining a friction surface, and a support plate (13) which supports said friction material (12) and is adapted to release the braking action onto the caliper (101) of the disc brake (100), in which said support plate (13) comprises at least one lateral projection (14) which extends in a direction substantially coplanar to the plate (13) and is placed at an end of the support plate (13), and in which said at least one lateral projection (14) is adapted to be accommodated in a pock

Abstract: The description relates to devices that include hinged portions and controlling rotation of the hinged portions with smart clutch control. One example can include powering a motor to cause clutch portions to engage in a first instance. The example can also include monitoring an operational parameter during the powering. The method can further include, based at least in part upon the monitoring, adjusting power to cause the clutch portions to engage in a second instance with a force that is different than the first instance.

Abstract: A brake lock system for a pumpjack brake apparatus comprises a latch handle lever pivotally mounted at a location on a pumpjack, a countershaft rotatably mounted on the pumpjack, latch handle linkage, and control linkage that transitions movement and force of the latch handle lever to a latch arm with a latch dog for pivoting the latch arm to insert the latch dog in a notch in the pumpjack brake apparatus. The latch handle, latch handle linkage, control linkage, and latch arm have dimensions that provide a mechanical advantage of the latch handle lever over the latch arm.

Abstract: Brake discs, systems, and methods may include a brake disc and a brake drum. In various embodiments, the brake disc includes a central hub, configured to engage with an axial shaft. The brake disc includes protrusions, each of which is coupled to the central hub and extends perpendicularly from the central hub. The brake disc includes expansion components, each of which is coupled to the central hub at two locations. Each expansion component surrounds an outer periphery of one of the protrusions. The expansion components define a segmented periphery configured as a braking surface. The brake drum is configured to have an inner diameter that is larger than an outer diameter of the brake disc. The outer diameter of the brake disc is defined by the segmented periphery, such that an inner surface of the brake drum is concentric around the segmented periphery of the brake disc.

Abstract: Provided are a brake disc and a brake disc manufacturing method. The brake disc manufacturing method may include a porous metal block preparation operation for preparing a porous metal block having a plurality of pores therein, and an insert casting operation for mounting the porous metal block in a mold and casting a disc plate material to manufacture a brake disc.

Abstract: Methods, systems, and apparatus, including medium-encoded computer program products, for designing and manufacturing rotors for disc brake systems and apparatus include, in one aspect, a method including: placing a lattice structure in a ventilation space within a 3D model to create more internal surface area within a disc brake rotor between inner and outer rotor discs; adjusting a number of lattice unit cells for the lattice structure in different regions of the 3D model between the rotor discs to increase air turbulence in the ventilation space; adjusting one or more thicknesses of beams forming the lattice structure in different regions of the 3D model between the rotor discs to prevent structural failure under predefined loading conditions; and providing an updated version of the 3D model of the disc brake rotor that incorporates the lattice structure after adjustment of the number of lattice unit cells and the beam thickness(es).

Abstract: A braking device for a motor vehicle includes at least one brake, at least one brake pad, a brake disk, and an elastic element. The elastic element is configured to place the brake pad against the brake disk such that the brake pad and the brake disk generate either no braking force or a small braking force acting on the motor vehicle. The at least one brake is operatively interrelated with the elastic element.

Abstract: A disc brake for a utility vehicle has a brake caliper engaging over a brake disc, at least one application device for applying the disc brake by way of a displaceably guided bridge, which bridge has at least one threaded hole, into which an actuating spindle passing through a closure plate connected to the brake caliper and provided with an external thread is screwed. The spindle bears a pressure piece which can be rotated relative thereto, by which pressure piece a brake pad can be pressed against the brake disc. A readjusting device is operatively connected to the actuating spindle for readjusting a clearance. A securing ring is provided, which is held on the bridge so as to be secured axially and against rotation and which, in an end position of the actuating spindle screwed in counter to the actuating direction, in order to secure the actuating spindle against rotation, engages with a form fit in a thread-free end region of the actuating spindle which is assigned to the pressure piece.

Abstract: A shield assembly is employed for a friction brake used to decelerate a road wheel of a vehicle. The vehicle has a body with a first body end configured to face an incident ambient airflow, a second body end opposite of the first body end, and an underbody section spanning a distance between the first and second ends. The shield assembly includes a first shield component arranged proximate the brake and rotationally fixed relative to the vehicle body. The shield assembly also includes a second shield component operatively connected to the first shield component for shifting relative thereto. The shield assembly additionally includes an actuator employing a shape memory alloy element to shift the second shield component relative to the first shield component in response to a temperature of the brake to thereby direct at least a portion of the airflow to the brake and control temperature thereof.

Abstract: This brake pad wear detector is provided with an attachment part attached to a back plate having a first surface to which a lining in contact with a sliding surface of a disc rotor is secured and a second surface on the side opposite the first surface, an arm part protruding from the attachment part toward the side of the first surface opposite from the second surface, the arm part being curved toward the opposite side, and a contact part provided to the arm part and provided to a position where the contact part will come into contact with the disc rotor when the lining has worn away.

Abstract: A damper assembly with a bypass for a vehicle comprises a pressure cylinder with a piston and piston rod for limiting the flow rate of damping fluid as it passes from a first to a second side of said piston. A bypass provides a fluid pathway between the first and second sides of the piston separately from the flow rare limitation. In one aspect, the bypass is remotely controllable from a passenger compartment of the vehicle. In another aspect, the bypass is remotely controllable based upon one or more variable parameters associated with the vehicle.

Abstract: Methods and apparatus for lubricating suspension seals by pumping fluid to the seals using a compression or rebound action of a suspension component.

Abstract: A bracket device to secure a tail wire of a drop wire clamp to a structure including a base having a surface. The bracket device further includes a retention hook having a first end, a second end, and retention region defined between the first end and second end. The first end of the retention hook is coupled to the base surface, and the second end of the retention hook is disposed at a predetermined distance from the base surface to define a gap therebetween having a width. The bracket device further includes a locking nut that is cooperatively coupled to the second end of the retention hook and adapted to move between an unlocked position to permit a wire to enter the retention region and a locked position in which a wire is retained by the retention hook in the retention region by a reduction of the gap width.

Abstract: A modular multi-engine system having a plurality of engines and a plurality of gear units each gear unit having at least one rotatable member and a drive shaft being driven by one of the plurality of engines, where at least one of the gear units is a main gear and the other peripheral gear unit(s). Each rotatable member of each gear unit engages at least one other rotatable member of an adjacent gear unit such as to ultimately transfer torque from all the engines operable in said modular multiengine system to an output drive shaft connected to said main gear unit. The rotatable member of at least one of the peripheral gear units is located at a different height than at least one other cogwheel of another gear unit.

Abstract: A system for transforming rotating motion into linear motion may include an output gear and an output link coupled to the output gear. A shared link may be coupled to the output link and coupled to a rod. An arm may be coupled to the shared link and to a rotating drive. An idle gear may be coupled to the output gear and to a stationary gear. Once rotation has started with the rotating drive, the output gear and idle gear may rotate around the stationary gear while the output link pivots and translates through space with the output gear. The shared link may drive the rod in a linear direction while receiving stabilizing supporting forces from the output link. The intermediate link may be coupled to the output link with a pin. The pin may also couple the intermediate link to the arm.

Abstract: An actuator for positioning a solar array to track the sun includes a motor and a single-stage cycloidal gearbox operatively coupled to the motor. The single-stage cycloidal gearbox includes a drive shaft rotationally coupled to the motor to rotate the drive shaft about a drive axis at a first input speed, an input gear coupled to and driven by the drive shaft, and an output gear configured to be engaged and driven by the input gear at a second output speed. The single-stage cycloidal gearbox is configured to reduce the first input speed to the second output speed within a single rotation of the drive shaft. The first speed is reduced to the second speed by a factor of at least 60 within the single rotation of the drive shaft.

Abstract: A planetary wheel drive uses: main bushings affixed to a rotatable housing between a stationary spindle permitting the rotatable output housing to rotate with respect to the stationary spindle, and, planet bushings affixed to rotatable planet gear between a planet pin permitting the planet gear to rotate with respect to the planet pin. The main bushings have two sides, a first side which is press fit into the rotatable output housing and a second side which includes a sliding layer which mates with a surface of the stationary housing.

Abstract: A planetary gear train of an automatic transmission may include an input shaft receiving power, an output shaft outputting power, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth and sixth rotation elements, a third planetary gear set including seventh, eighth and ninth rotation elements, a fourth planetary gear set including tenth, eleventh and twelfth rotation elements, a fifth planetary gear set including thirteenth, fourteenth and fifteenth rotation elements, and first to ninth shafts for connecting the rotation elements of the first to fifth planetary gear sets to each other.

Abstract: A planetary gear train may include input and output shafts, first to fifth planetary gear sets respectively having first to third, fourth to sixth, seventh to ninth, tenth to twelfth, and thirteenth to fifteenth elements, a first shaft fixedly connected to the first, eighth, and thirteenth elements and the input shaft, a second shaft fixedly connected to the fourteenth element and the output shaft, a third shaft fixedly connected to the fifth element, a fourth shaft fixedly connected to the sixth element, a fifth shaft fixedly connected to the ninth element, a sixth shaft fixedly connected to the eleventh and fifteenth elements, a seventh shaft fixedly connected to the second and fourth elements, an eighth shaft fixedly connected to the third, seventh, and tenth elements, and a ninth shaft fixedly connected to the twelfth element.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include: an input shaft; an output shaft disposed in parallel with the input shaft; a first planetary gear set having first, second, and third rotation elements; a second planetary gear set having fourth, fifth, and sixth rotation elements; a first shaft fixedly connected to the first rotation element and selectively connected to the input shaft and a transmission housing; a second shaft fixedly connected to the second rotation element; a third shaft fixedly connected to the third rotation element; a fourth shaft selectively connected to the input shaft; a fifth shaft fixedly connected to the fourth rotation element and fixedly connected to the output shaft; a sixth shaft fixedly connected to the fifth rotation element; and a seventh shaft fixedly connected to the sixth rotation element, selectively connected to the fifth shaft.

Abstract: A vehicle powertrain includes first and second power sources and a transmission assembly having first and second input members and an output member. The transmission assembly also includes a first multiple node planetary gear-set connected to both input members and a second multiple node planetary gear-set connected to the output member. The transmission assembly additionally includes a transmission housing retaining the first and second gear-sets. Furthermore, the transmission assembly includes a first torque-transmitting device for connecting one second gear-set node to the transmission housing and a second torque-transmitting device for connecting one first gear-set node to one second gear-set node. One first gear-set node is directly and continuously connected to one second gear-set node. The first and second power sources are connected to the first gear-set, and the first power source is connected to the first gear-set node not directly and continuously connected to the second gear-set.

Abstract: A hydraulic auto-tensioner includes a sleeve; a rod vertically movable relative to the sleeve; a spring seat fixed to the portion of the rod protruding beyond the sleeve; a return spring configured to bias the spring seat upwardly; oil passages through which a pressure chamber communicate with a reservoir chamber; a check valve mounted to the oil passages; a tubular plunger vertically movably mounted between the outer periphery of the rod and the inner periphery of the sleeve; a first leakage gap defined between the inner periphery of the tubular plunger and the outer periphery of the rod; an upper stopper configured to restrict the upwardly movable range of the tubular plunger; and a pressure regulating spring disposed above the tubular plunger so as to surround the outer periphery of the rod.

Abstract: A variator comprises first and second races disposed for rotation about a variator axis and at least one rolling element disposed in a cavity between the races. In a drive configuration, drive is transmitted between the races and the at least one rolling element; and in a neutral configuration, the at least one rolling element and races are configured whereby the races can move independently of one another. In a method of operating the variator, the neutral configuration is obtained by moving the at least one rolling element to a position in which it ceases to make contact with at least one of the races. The drive configuration is obtained by moving the at least one rolling element to a position in which it makes contact with both of the races.

Abstract: A ball screw and nut mechanism has a screw in cooperation with a nut via balls that can circulate in a raceway formed by the opposing threads of the screw and nut. The nut has a recirculation insert passing therethrough from the outer face to the thread, the recirculation insert having a first end with a ball transfer groove turned towards the screw. The mechanism has a holding body for holding the recirculation insert in the housing, the recirculation insert having a second end with a shoulder bearing on the nut, the second end of the recirculation insert having an orientation lug having an angular position predetermined and fixed relative to the ball transfer groove, the orientation lug cooperating with a guide relief of the holding body to fix an orientation of the recirculation insert such that the transfer groove is adjusted to the raceway.

Abstract: Disclosed herein are systems, gearing assemblies and methods for controlling a differential rotation rate between shafts of a vehicle using a variable speed reversible motor. An embodiment includes a gearing assembly including a differential configured to engage a first axle shaft, a second axle shaft, and a drive shaft of a vehicle. The gearing assembly further includes a first plurality of alignment gears and a second plurality of adjustment gears configured to engage the differential, configured to be driven by a variable speed reversible motor of the vehicle, and configured to controllably alter a rotation rate of a first axle shaft relative to a rotation rate of the second axle shaft based on rotation produced by the variable speed reversible motor.

Abstract: A drive torque received from a power source is split and output to first and second output shafts through a torque vectoring apparatus including a torque vectoring device that controls a torque ratio of split torques, where the torque vectoring device includes a control motor, a first compound planetary gear set including first and second planetary gear sets having a first rotation element fixed to a housing, a shared second rotation element connected to the first output shaft, and a third rotation element, and a second compound planetary gear set including third and fourth planetary gear sets having a shared fourth rotation element connected to the second output shaft, a fifth rotation element connected to a third rotation element, and a sixth rotation element connected to the control motor.

Abstract: A vibration damping device for a belt drive of an internal combustion engine includes a belt pulley, a hub and a decoupling device. The decoupling device connects the belt pulley and the hub to each other, and has at least two spring members. The spring members can be connected in series.

Abstract: A continuously variable transmission for a utility vehicle includes a drive clutch, a driven clutch operably coupled to the drive clutch, and a housing generally surrounding the drive and driven clutches. The housing includes an inner cover, an outer cover removably coupled to the inner cover, an air inlet positioned on one of the inner cover or the outer cover, and an air outlet positioned on the one of the inner cover or the outer cover.

Abstract: A power transmission system includes a first case, a second case, a first tube, and a shaft. The first tube is configured to supply a lubricating oil to a first bearing and a second bearing. A shaft is rotatably supported by the first bearing and the second bearing. The shaft is provided with a through-hole extending through the shaft in an axial direction of the shaft. The first tube is insertedly fixed to an insertion hole of the first case from an outside of a space where the shaft is disposed. The first tube includes a first opening and a second opening, the first opening is configured to supply the lubricating oil to the first bearing, and the second opening is configured to supply the lubricating oil to the second bearing via the through-hole of the shaft.

Abstract: A vehicle axle includes a housing, differential gearing, and a first clutch. The housing defines first and second cavities. The housing also defines a channel extending between the first and second cavities. The differential gearing is disposed within the first cavity and has a carrier extending into the second cavity. The first clutch is disposed within the second cavity. The first clutch is configured to selectively couple a half-shaft to the carrier. The first clutch has friction plates that include fanned spokes positioned to draw fluid from the channel and into the second cavity.

Abstract: A transmission actuator for tractor includes: a motor which provides power; rails which are movable by operating the motor; a rail sensor which detects a neutral state of the rails; a position sensor which detects a movement displacement of the rails; and a rotation sensor which is mounted to the motor to detect the number of revolutions of the motor.

Abstract: In a transmission control device for controlling a transmission, a controller determines failure of a SOL corresponding to a hydraulic primary-pressure actuator. The controller variably controls line command pressure, and in a case where the failure is determined, continuously changes a speed ratio of a variator by variably controlling the line command pressure. The controller variably controls primary command pressure, and in a case where the failure is determined, fixes the primary command pressure to a primary pressure set value. The controller variably controls secondary command pressure, and in a case where the failure is determined, fixes the secondary command pressure to a secondary pressure set value.

Abstract: A clutch assembly for selectively transmitting torque between an engine and a torque converter is provided. A first plate is non-rotatably connected to a torque converter cover. A second plate is configured to receive a torque input from an engine. A wedge clutch is disposed axially between the first and second plates and is configured to selectively transfer torque between the first plate and the second plate. The wedge clutch includes wedge segments that are configured to collectively radially expand and contract to selectively transfer torque between the first plate and the second plate.

Abstract: A torque converter system of a vehicle for delivering an input torque to a transmission may include a front cover of a torque converter receiving the input torque through a torque receiving shaft, an impeller of the torque converter receiving the input torque through the front cover, a turbine of the torque converter disposed opposed to and coaxially with the impeller and rotated by an operation fluid supplied from the impeller thereby driving a transmission input shaft, a reactor of the torque converter disposed between the impeller and the turbine and redirecting the operation fluid from the turbine toward the impeller, and a lock-up clutch disposed inside a transmission to selectively connecting the front cover and the turbine.

Abstract: A system for determining a torque converter clutch is stuck in an engaged position includes a control module, an engine speed sensor, and a transmission speed sensor. The control module evaluates the torque converter clutch by determining a value of a torque converter clutch command. The torque converter clutch command indicates a position of the torque converter clutch. In response to determining that the value of the torque converter clutch command indicates the disengaged position, the control module calculates accumulated slip based on the transmission speed and the engine speed during an evaluation time. In response to determining the evaluation time is complete, the control module compares the accumulated slip with a calibrated threshold of slip. In response to the accumulated slip being less than or equal to the calibrated threshold of slip, the control module determines the torque converter clutch is stuck in the engaged position.

Abstract: A vehicle control device for controlling a vehicle including a variator provided in a power transmission path between a driving source and a driving wheel of a vehicle and a friction engaging element provided between the variator and the driving wheel, engaged when a running range is selected, while disengaged when a non-running range is selected and shutting off transmission of power through the power transmission path is provided.

Abstract: A park valve performs a multi-plexing function in which an out-of-park circuit is connected to line pressure when the valve is in an out-of-park position and is vented when the valve is in a park position. When particular clutches are released, the out-of-park circuit biases the park valve toward the out-of-park position. To engage park, a controller commands a low line pressure, reducing the forces that bias the park valve toward the out-of-park position. To accelerate the pressure decay in the line pressure circuit, thereby decreasing the time required to achieve park, the controller commands engagement of one or more shift elements.

Abstract: A vehicle includes a transmission having a park-override shaft. The vehicle further includes an override mechanism that includes a cannister disposed about the park-override shaft, a cam rotatably fixed to the park-override shaft, and a pawl rotatably secured to the cam. The vehicle further includes an override cable secured at a first end to the cam and at a second end to an actuator disposed within a cabin of the vehicle. Actuation of the actuator rotates the cam and displaces the pawl.

Abstract: A sliding element, in particular a piston ring has an outer circumferential running surface of the piston ring, has no nitriding layer, preferable no surface hardening the running surface has as an outermost layer, which differs from the intermediate layer, a DLC layer or a metal-based nitride layer, preferable a metal nitride layer, preferably a CrN layer. Provided between the substrate of the sliding element and the DLC layer there is at least one metal-containing intermediate layer, preferably a metal layer, particularly preferable a chromium layer, and at least one further surface of the sliding element, preferably the piston ring flanks, is surface-hardened, preferably has a nitriding layer.

Abstract: A bearing with an integral diverted lantern ring for installation into the seal cavity of a rotary mechanical device to provide a bearing surface and allow for flush fluid to engage the shaft closer to the motor end is provided. The bearing eliminates whip in a rotating shaft and is split to allow easy installation over an installed shaft. The bearing is substantially cylindrical with an inner bore closely approximating the outer diameter of the shaft. The diverted lantern ring includes an outer groove at the impeller end on the outer surface at a flush port and a groove on the inner surface at a location closer to the motor end. Flush fluid channels are provided between the outer groove and inner groove of the bearing. The purpose is to redirect the external flush from the impeller end on the OD to the motor end on the ID, thus repositioning the flush deposit on the sleeve, under the bearing. This allows the throttling characteristic of the close clearance bearing surface to increase.

Abstract: A method of manufacturing a packing cup for a hyper-compressor is described. The method comprises the following steps: providing an inner disc (25), having opposed first front face (25X) and second front face (25Y), a central axial hole (18) and at least one lubrication-oil duct (23); autofrettaging the lubrication-oil duct (23); after autofrettaging, removing a thickness (D) of the inner disc on both faces thereof.

Abstract: The present invention provides a dynamic seal for enclosing a radial gap between coaxial, relatively rotatable inner and outer members. The dynamic seal includes an inner seal part, mountable to the inner member; an outer seal part, mountable to the outer member; and a counterface part radially suspended between the inner and outer seal parts and coaxial therewith. Each of the inner and outer seal parts provides a set of first and second sealing elements, which bear against oppositely oriented axial surfaces of the counterface part. The counterface part is thus axially retained in both directions by the inner seal part at a radially inner contact location, and is axially retained in both directions by the outer seal part at a radially outer contact location.

Abstract: The present invention provides a shaft sealing device for being mounted on a rotating shaft. The shaft sealing device of the present invention includes a stationary member disposed on a housing of the shaft sealing device and having a first sealing surface; and a rotary member corresponding to the stationary member, disposed on the rotating shaft and having a second sealing surface opposite to the first sealing surface of the stationary member. A groove is disposed on the first sealing surface or the second sealing surface, and extends inwardly from the outer peripheral edge. When the groove extends inwardly, an end (a bottom wall) of the groove extends along a tangential direction of an imaginary circle containing the bottom wall of the groove.

Abstract: A mechanical seal, which seals a sealed fluid by interposing an intermediate ring between a rotating ring and a stationary ring, includes a first annular effective seal portion where the rotating ring and the intermediate ring slide with each other and a second annular effective seal portion where the stationary ring and the intermediate ring contact with each other. A load receiving portion is arranged between the intermediate ring and the stationary ring in opposition to a side of the sealed fluid across the sealed fluid of the second annular effective seal portion in a radial direction.

Abstract: An assembly for rotational equipment includes a plurality of seal shoes, a seal base, a plurality of spring elements and a frangible element. The seal shoes are arranged around an axis in an annular array. The seal base circumscribes the annular array of the seal shoes. Each of the spring elements is radially between and connects a respective one of the seal shoes and the seal base. A first of the spring elements includes a first mount, a second mount and a spring beam. The first mount is connected to a first of the seal shoes. The second mount is connected to the seal base. The spring beam extends longitudinally between and connects the first mount and the second mount. The frangible element is configured to restrict radial outward movement of the first of the seal shoes.