Abstract: A reversing drive unit used in association with a clutch/brake unit and a motor driven in only one direction comprising a first shaft, a housing around at least a portion of the shaft with a second shaft extending from a position interior the housing to a position exterior of the housing, a gear disposed at the end of the second shaft engageable with one or the other of a first and second annular gears disposed on and coaxially encircling the axis of the first shaft, and a mechanism to engage one or the other of the annular gears, with the second shaft gear moving the gears between a first position for affecting engagement of the first annular gear with the second shaft gear to provide relative rotation between the second shaft and the first shaft in one direction and a second position for affecting engagement of the second annular gear with the second shaft gear to provide relative rotation between the second shaft and the first shaft in a second direction opposite to said first direction.

Abstract: A first input shaft and an output shaft are supported in axial alignment by a housing which contains oil and also supports an annular second input shaft coaxial with the output shaft. The input shafts may be selectively coupled to the output shaft by compressing corresponding clutch sets of interfitting annular plates and discs, and the output shaft may be quickly stopped by compressing a brake set of interfitting annular plates and discs. The brake set is disposed between the two clutch sets, and a pair of non-rotating fluid actuated pistons are arranged between the corresponding clutch sets and the brake set. The output shaft has fluid impeller hub portions for recirculating oil outwardly between the sets of plates and discs and the input shafts are driven by corresponding electric motors or by a single double-ended electric motor.

Abstract: A transmission coupling 1 for location between an electric motor 2 and a gearbox 3, comprises a rigid housing 4, an input shaft 5 rotatably supported within the housing 4, an output shaft 6 also rotatably supported within the housing 4 and connectable to the input shaft 5 by operation of a hydraulically actuated, multi-plate clutch 11, the output shaft 6 also carrying some elements of a multi-plate brake 22, other elements being carried by the housing 4, the brake 22 being spring loaded into operative position and hydraulically displaceable into a non-operative position, a constant pressure pump 31 to provide hydraulic pressure fluid to effect operation of the clutch 11 and brake 22, in accordance with the fluid volume demanded by clutch and brake operation, the pump volume output automatically being adjusted in response to such demand, and at least one control valve 35 to control the flow of the hydraulic fluid to the working circuit 39.

Abstract: A clutch and brake system for starting and stopping a power press uses hydraulically actuated brake and clutch mechanisms. To start the press, the brake is hydraulically released while the clutch is hydraulically engaged at a predetermined intermediate torque level which is less than the full clutch torque level. The clutch is maintained at that intermediate torque level until the present drive shaft has attained its substantially full speed, and is then increased to the full clutch torque level. To stop the press, the clutch is hydraulically disengaged while the brake is hydraulically engaged at a predetermined intermediate torque level which is less than the full brake torque level. The brake is maintained at this intermediate torque level until the press drive shaft has substantially stopped, at which time the brake torque is increased to the full brake torque level.

Abstract: A clutch drum for an automatic transmission features a large diameter portion in which a plurality of first slots define castle-like projections about one end thereon and a second set of slots which originate in the projections near the tops thereof and which extend to and terminate in an essentially frusto-conical portion which interconnects the large diameter portion and a small diameter portion containing a piston therein. The first slots serve to mount clutch discs within the drum while the second slots mount discs about the drum. The relatively wide castle-like projections allow the production of the drum from relatively light gauge sheet metal, which has adequate structural rigidity and a reduced maximum diameter.

Abstract: An improved clutch and brake unit in combination with a rotatable flywheel, the clutch and brake unit having a housing assembly forming a reservoir chamber around a portion of the drive shaft of a machine and surrounding the clutch and brake unit which permit the housing assembly, clutch and brake unit, and shaft to be removably secured as one unit to the rotatable flywheel. A universal coupling is also disclosed, used in combination with an output shaft of a drive assembly and an extension shaft of a driven assembly, comprising radially outwardly extending flanges at the adjacent ends of each shaft, a mating boss on one shaft matable into a recess in the other shaft to dispose the shafts such that the flanges are adjacent one another, a key inserted in a transversely disposed keyway disposed in part within each shaft, a retainer to hold the shafts together at the flanges and retain the key and securement to secure the retainer to the shafts.

Abstract: A clutch/brake unit with a modular heat exchanger apparatus, the apparatus including a heat exchanger, oil flow control to the heat exchanger, low oil temperature and high oil temperature sensors associated with a control mechanism for starting and stopping the flow of cooling fluid through the heat exchanger, and an over temperature oil sensor associated with a control to stop the clutch/brake unit if the oil temperature is too high for proper utilization of the unit. The clutch/brake unit also includes a flywheel brake which can be readily pneumatically controlled, having a modular control mechanism.

Abstract: A friction interface unit is shown according to the teachings of the present invention for use with a clutch, a brake, or a clutch-brake. The unit includes a hub having an annular friction flange and adapted to receive a shaft. A first housing portion is rotatably supported by a pair of bearings interposed between and in radial alignment with the hub and the first housing portion. The first housing portion is adapted to be associated with a sheave, an anchor mount for a brake, or a ring disc for a caliper brake. A second housing portion is further provided which has a central circular portion and which is bolted to the first housing portion thereby forming a full housing. Also included is a piston having an annular flange extended over said central circular portion to form a cylinder with a single O-ring.

Abstract: The mechanism comprises a main shaft 4, a drive wheel 5 non-rotatable thereon, a clutch 2 having a disc carrier 6 non-rotatable with respect to the drive wheel 5, and a parking brake 3 lockable with respect to the drive wheel 5 and disc carrier 6. A spring 7 through a transmission piston 9 acting on the carrier 6 closes the clutch 2, and a hydraulic piston 8 with a pressure chamber 55 opens the clutch 2. Wet multi-disc clutches and brakes are preferred. The transmission piston may be connected to the power piston 9. The mechanism is suitable for vehicles drivable by more than one axle.

Abstract: A two-speed transmission with hydraulic actuation of the shifting operations under load for hydrostatically operated work machines, particularly caterpillar-track excavators, having a planetary gearing provided with double planet gears, and having packs of discs which are arranged coaxially around the axis of the sun gear of the planet gearing and which act as a clutch or as a brake, respectively. The planet carrier of the planetary gearing is formed as a flywheel and the shifting step of the transmission which serves for starting the work machine is shifted by means of compression springs, and the parking brake, biased by springs, connects the clutch and the brake non-rotatably relative to the housing of the transmission.

Abstract: In a power take-off a spring engages a hydraulically actuated clutch-activating pressure plate to force the same into a neutral position. In one embodiment of the invention a hydraulically operated spring-loaded piston for arresting the rotational motion of an output shaft engages the pressure plate upon shifting thereof into its neutral position and consequent uncoupling of the output shaft from an input or drive shaft. In another embodiment of the invention an annular friction disk slidably connected or splined to the output shaft for stopping the same is clamped between a brake housing and a hydraulically actuated piston. The pistons automatically retract under the action of respective springs upon shut-off of the vehicle engine driving the input shaft and energizing the hydraulic system actuating the plates and the pistons, whereby the angular position of the output shaft may be manually adjusted.

Abstract: A rotatable cutting drum of a mineral mining machine is supported by a pivotable arm and is operably associated with a blade or the like which is positionable to assist in loading mineral detached by the drum. The blade is carried on a ring-like support which is itself mounted for pivoting about the axis of the drum to position the blade. Apparatus serves to couple the blade and its support selectively to the drum when it is desired to re-position the blade so that the latter moves around the axis of rotation of the drum with the drum itself. The apparatus is composed of piston and cylinder units provided in the blade support. The piston rods of these units extend outwardly from either side of the blade support and carry first and second abutment or friction rings. These respective friction rings either couple the blade support to the arm supporting the drum or to the drum.

Abstract: A drive mechanism having a clutch assembly and a brake assembly comprising a housing, an input shaft rotatably supported by the housing, an output shaft rotatably mounted relative to the housing through the brake assembly, the clutch assembly being spring-engaged and hydraulically disengaged and the brake assembly being spring-actuated and hydraulically released wherein a fluid passage for lubricant is formed in the input shaft and in the clutch assembly and which fluid passage is open to a mounting surface of annular plates of the clutch assembly for lubricating the annular plates and associated clutch disks and another fluid passage is formed in a stationary section of the brake assembly and is open to a mounting surface of annular plates of the brake assembly for lubricating the annular plates and associated brake disks.

Abstract: An over-the-road type vehicle for transport and powering of a seismic hydraulic vibrator which is adapted to operate in either one of two modes of operation. A first mode is the conventional mode wherein the vehicle is operated over large distances at varying road speeds, obtained by use of multiple gear ratios, and varying engine speeds. The second mode of operation is in a single value of road speed, with engine under control of a governor, to operate at constant high speed, and the movement of the vehicle is by successive short traverses at constant speed. In this second mode of operation the single engine alternately powers the hydraulic vibrator, and with the engine still at high speed, then moves the vehicle to a new vibration point a short distance away. A high energy efficiency is provided by the use of a mechanical, rather than hydraulic drive system, and a high time efficiency is provided by a novel style of clutch that can start the vehicle from rest with the engine at maximum speed.

Abstract: The drum of a winch suitable for cranes is driven by gearing compactly arranged within the drum, leaving room also for a free fall dog clutch when desired. The gearing is of the compound planetary type which can provide very high ratios with low friction. The low friction yields greater efficiency, and permits retaining the gearing in operation idly during free fall, ready for fail-safe braking using it. A separate brake is provided for stopping free fall, when free fall is provided. The winch motor is preferably of the two unit type, with valving for two speeds. Operation of either manual valve (normal operation or free fall) from its neutral position neutralizes the other. Numerous automatic valves are included in a valving block, providing simplicity of piping.

Abstract: A combined hydrodynamic retarding brake and oil-cooled driveline flywheel clutch, the clutch (72) being integral with a retarding brake impeller (52) rotatable in a body of oil (58) contained within a housing (22) having a retarder flow circuit (118) therein, the amount of retardation being controllable by varying the amount of oil present in the circuit (118), the retarder impeller (52) operating to supply a flow of cooling oil through the clutch (72), and a clutch brake (102) operable to apply a braking action to the clutch, as the clutch (72) is disengaged operating to stop clutch output, and cut off oil flow to the clutch thereby reducing viscous drag at the clutch.

Abstract: The present invention relates to a multiple-disk clutch comprising an input shaft; an output shaft having splines formed thereon; a plurality of clutch disks slidably disposed on the output shaft for engagement with the splines; a clutch plate, provided on the output shaft, for pushing the plurality of clutch disks into engagement with the splines; a first rod for transmitting driving force from the input shaft to the output shaft through the plurality of clutch disks; and a second rod for pushing the output shaft in the opposite direction of the first rod so as to cancel the thrust force caused by the first rod moving in the direction in which the clutch is moved for power engagement. The advantages obtained by this structural engagement of these elements making up the opposition forces include the reduction of bearing wear.

Abstract: A ratarder for a power transmission shaft comprises a liquid immersed coupling between the shaft and a drag member, the drag member being normally entrained to rotate with the shaft by viscous drag in the coupling. A dry brake mechanism, having a frictional drag greater than that of the coupling, is provided to restrain the drag member for relative movement to take place in the coupling. In the embodiments shown, the coupling comprises a friction disc pack alternately connected to the shaft and the drag member, the brake mechanism firstly restraining the drag member and subsequently shifting it axially to engage the friction disc pack.The coupling is suitable for use in heavy motor vehicle transmission systems.

Abstract: Disclosed is a drive assembly (10) for an electrically powered vehicle (12). The assembly includes a transaxle (16) having a two-speed transmission (40) and a drive axle differential (46) disposed in a unitary housing assembly (38), an oil-cooled prime mover or electric motor (14) for driving the transmission input shaft (42), an adapter assembly (24) for supporting the prime mover on the transaxle housing assembly, and a hydraulic system (172) providing pressurized oil flow for cooling and lubricating the electric motor and transaxle and for operating a clutch (84) and a brake (86) in the transmission to shift between the two-speed ratios of the transmission. The adapter assembly allows the prime mover to be supported in several positions on the transaxle housing. The brake is spring-applied and locks the transmission in its low-speed ratio should the hydraulic system fail. The hydraulic system pump is driven by an electric motor (212) independent of the prime mover and transaxle.

Abstract: Disclosed is a drive assembly (10) for an electrically powered vehicle (12). The assembly includes a transaxle (16) having a two-speed transmission (40) and a drive axle differential (46) disposed in a unitary housing assembly (38), an oil-cooled prime mover or electric motor (14) for driving the transmission input shaft (42), an adapter assembly (24) for supporting the prime mover on the transaxle housing assembly, and a hydraulic system (172) providing pressurized oil flow for cooling and lubricating the electric motor and transaxle and for operating a clutch (84) and a brake (86) in the transmission to shift between the two-speed ratios of the transmission. The adapter assembly allows the prime mover to be supported in several positions on the transaxle housing. The brake is spring-applied and locks the transmission in its low-speed ratio should the hydraulic system fail. The hydraulic system pump is driven by an electric motor (212) independent of the prime mover and transaxle.

Abstract: A power transmission for tractors or the like and having change speed gear mechanism and also having a power take-off shaft for driving auxiliary equipment. A hydraulically actuated clutch is utilized in the transmission for selectively engaging various gear ratios. A hydraulically actuated brake is provided for disconnecting the drive shafts and locking the power take-off to the transmission housing. Operating control valve means are provided for controlling the power take-off brake and a hydraulic detent is provided for the valve. The power take-off shaft is controlled by a modulatable clutch of the duplex type which enables the operator to modulate the speed of the power take-off shift and automatically insures that the power take-off shaft is locked and the power take-off brake is disengaged. The control valve for the power take-off brake includes a hydraulic detent that can lock the operator shifted control valve in the clutch operative position.

Abstract: A rotary centrifuge basket or container is suspended from a center drive shaft depending from a part-spherical bearing assembly mounted on a frame whereby the rotating container may also gyrate about the center point of the bearing. An oil shear clutch-brake unit includes a housing mounted on the frame and has a vertical output shaft formed as an extension of the container drive shaft. An aligned vertical input shaft is rotatably supported by the housing and projects upwardly to connect with the vertical drive shaft of an electric motor supported by the housing. A clutch includes a series of annular clutch plates which rotate with the input shaft and interfit between a series of annular clutch discs which rotate with the output shaft. A brake includes a series of brake discs which also rotate with the output shaft and interfit between a series of brake plates connected to the housing.

Abstract: Power take-off gearing for separate drives, for the propellers of an amphibious vehicle, or the like: A main drive shaft drives two separate driven shafts through respective slip clutches. Each clutch comprises a set of interleaved disks. A respective plunger selectively presses or does not press each set of disks together to drive each driven shaft at a speed dependent upon the plunger pressure. Hydraulic means which are solenoid valve controlled selectively activate and deactivate the clutch plungers, each clutch has its own control valve. A brake for both driven shafts is also activated by the solenoid valve.

Abstract: A piston stroke adjusting arrangement for disc-type friction clutches or brakes used most advantageously in forging machines and presses where rapid engagement and disengagement of clutches and brakes is essential. The arrangement includes a housing and a cylinder flange, fast with each other, the cylinder receiving the piston reciprocating therein. Axial displacement of the piston is limited by a washer arrangement in a groove made in the housing and having radially running recesses of different depths. The flange of the cylinder carries an abutment engageable in one of the radial recesses of the washer. The disclosed construction simplifies the structure of the arrangement, as a whole, and provides for both rapid and reliable adjustment of the piston stroke value.

Abstract: An apparatus and a method for controlling the braking operation of a machine having a large moment of inertia. The machine is driven by a motor through a coupling device. The control circuitry initiates first an uncoupling of the coupling device followed by a braking of the input side of the coupling device. Thereafter, and after the input side of the coupling has come to a stop, the coupling device is reactivated to couple the output side to the input side. Since the input side is blocked, this will effectively bring the machine to a halt.

Abstract: A rotary centrifuge basket or container is suspended from a center drive shaft depending from a part-spherical bearing assembly mounted on a frame whereby the rotating container may also gyrate about the center point of the bearing. An oil shear clutch-brake unit includes a housing mounted on the frame and has a vertical output shaft formed as an extension of the container drive shaft. An aligned vertical input shaft is rotatably supported by the housing and projects upwardly to connect with the vertical drive shaft of an electric motor supported by the housing. A clutch includes a series of annular clutch plates which rotate with the input shaft and interfit between a series of annular clutch discs which rotate with the output shaft. A brake includes a series of brake discs which also rotate with the output shaft and interfit between a series of brake plates connected to the housing.

Abstract: A vehicle brake system having service brakes and a transmission with internal brakes in the transmission including an output brake and a gear reaction brake system providing friction braking of the transmission output. The transmission has planetary gearing in a housing and a first ratio fluid-operated reaction brake for braking a reaction gear for first ratio drive, and second and third ratio fluid-operated friction devices for establishing second and third ratio drives. The service brake system engages the service brakes and provides an output brake pressure increasing with brake demand to engage the output brake to brake the output shaft in all ratio drives.

Abstract: A combined clutch and double-action braking device for use in intermittently operating machines having a rotational driving shaft and a separate driven shaft, clutch or coupling disks secured to the driving shaft, and two braking disks fixedly arranged on a stationary holder, the device comprising a supporting disk secured to the driven shaft and defining a peripheral part and an intermediate part, the peripheral part projecting between the two braking disks, the intermediate part being extended to form two opposite tubular spaces divided by a fixed partition and each having an axially movable wall portion forming a pressure disk sealingly closing the assigned space; in rest condition, pressure springs resiliently urge each pressure disk against an assigned braking disk, whereas in actuated position pressure fluid is applied into the spaces to disengage the pressure disks from the braking disks and for urging one of the pressure disks against the coupling disk.

Abstract: An automatic transmission for automobiles having a gear means, a clutch and a brake, the engagement and disengagement of the clutch and the brake being changed over four shifting speed stages, wherein one of the mutually engageable friction elements of the brake is mounted to a housing of the transmission so as to be rotatably shiftable with respect to the housing through a small angle so that forward or backward rotary shifting of the friction element mechanically operates a timing valve which controls supply or exhaust of oil pressure to or from the brake.

Abstract: A transmission brake with a lubricating and cooling means whereby a portion of the actuating fluid is used to cool the transmission brake and lubricate the brake disks while the transmission brake is operated.

Abstract: The invention refers to a brake for the main shaft of a loom in which in the transmission of the energy between the driving motor and the main shaft a disconnectable friction coupling controlled by supervisory members for the weaving process is interposed, which has a slidable pressure-piece which in one extreme position, with the weaving process in order, preserves frictional engagement between the main shaft and the driving motor and which in the other extreme position, in the case of disturbances in the weaving process, produces frictional engagement between the main shaft and a brake rigidly connected to the machine frame.

Abstract: A combination clutch and brake unit for an engine driven lift fan propeller system controls power transfer from an engine to a propeller assembly and includes a clutch selectively operated by a hydraulic piston between engaged and disengaged positions to couple a drive input to a drive output and wherein a carriage for a hydraulic piston in a clutch supports a movable brake component and shifts it with respect to a fixed reaction brake member to brake the output shaft of the device to prevent free wheeling of the lift fan propeller when it is decoupled from the engine and wherein the clutch piston is biased into its decoupled position by return springs that also maintain the brake components in an engaged positon when the clutch is decoupled.

Abstract: The specification discloses a clutch and brake system wherein low and high speed clutch assemblies are mounted about a rotatable shaft. A brake assembly is disposed between the low and high speed clutch assemblies and includes friction surfaces mounted about the shaft. The brake assembly is normally biased to an engaged position to prevent rotation of the shaft. A housing is disposed about the brake assembly and annular pistons are slidably mounted in the housing on opposite sides of the brake assembly. The pistons are operable in response to fluid pressure to selectively disengage the brake assembly while engaging a selected one of the clutch assemblies. Structure is provided to interconnect the pistons to prevent simultaneous engagement of both the clutch assemblies. Structure is also provided to sense a temperature above a predetermined level in the pistons in order to cause deenergization of the clutch and brake system.

Abstract: A press drive mechanism is disclosed having primary brake and clutch disc assemblies concentric with respect to the output shaft of the mechanism, and a concentric fluid operated piston-cylinder assembly for alternately actuating the brake and clutch mechanisms. A pre-assembled auxiliary clutch unit is adapted to be removably mounted on one end of the output shaft in order to increase the torque capability of the drive mechanism, and the auxiliary clutch unit includes a fluid operated member cooperable with the primary actuating mechanism to achieve simultaneous operation of the primary and auxiliary clutch units.

Abstract: A clutch-brake unit having aligned input and output shafts, clutch plates carried by the input shaft, brake plates fixed to the housing, two series of friction discs secured to the output shaft and engageable alternately with the clutch or brake plates by means of a piston which actuates clutch and brake actuating members, and oil cooling means for the assembly including a pump, the output of which is proportional to the speed differential between the shafts. The pump is illustrated as being a Gerotor type of pump mounted between the shafts with its external element connected to the input shaft and its internal element to the output shaft.

Abstract: A piston stroke adjusting arrangement disc-type friction clutches or brakes used most advantageously in forging machines and presses where rapid engagement and disengagement of clutches and brakes is essential. The arrangement includes a housing and a cylinder flange, fast with each other, the cylinder receiving the piston reciprocating therein. Axial displacement of the piston is limited by a washer arrangement in a groove made in the housing and having radially running recesses of different depths. The flange of the cylinder carries an abutment engageable in one of the radial recesses of the washer. The disclosed construction simplifies the structure of the arrangement, as a whole, and provides for both rapid and reliable adjustment of the piston stroke value.

Abstract: The drive mechanism is installed intermediate a motor and a conveyor drive and comprises a clutch arranged between the driving section and the driven section and a brake arranged to stop the driven section. A pump is drivably connected to the driven section and feeds fluid pressure via a relay control valve to actuate the clutch and the brake, the control valve ensuring that the clutch is not applied before the brake is released.

Abstract: A clutch control valve serves to cut off the supply of hydraulic fluid pressure to a hydraulic operated clutch to render the clutch ineffective in response to the operation of a transmission for obtaining a change of gear ratio and serves similarly also when the brake is applied.

Abstract: A press drive mechanism is disclosed having relatively rotatable output shaft and flywheel components which are independently rotatably supported at their opposite ends by fixed support members. The flywheel is mounted on a sleeve which is concentric with the output shaft and located between the opposite ends of the shaft. Clutch discs are cooperatively supported by the sleeve and output shaft, and brake discs are cooperatively supported by the output shaft and one of the fixed support members. The brake and clutch are alternately engaged and disengaged by means of a pneumatic piston and cylinder assembly concentric with the output shaft inwardly adjacent the other of the fixed support members.

Abstract: A steering clutch and brake power drive assembly wherein a clutch pack and a brake pack formed of a plurality of facially engageable plates are respectively retained between a retaining plate and a housing portion of the assembly by a plurality of bolts which, in the assembled arrangement, provide a preselected stress in biasing springs acting on the clutch plates and brake plates, respectively. A novel arrangement of bolts is provided wherein different size bolts are utilized for facilitating the assembly and disassembly. A small number of the bolts is made to be sufficiently large so that the assembly may be maintained by a single one thereof notwithstanding a high biasing force generated by the spring in the assembled arrangement. An improved lubrication oil transfer structure is further provided to the plate stack from a pressurized oil supply defined by a lubricating oil cavity adjacent the plate stack.

Abstract: An auxiliary drive is provided for a drive mechanism for a conveyor, the mechanism including a brake and clutch arrangement designed to facilitate the starting and stopping of the conveyor. The auxiliary drive is conveniently mounted on the mechanism and has a drive motor driving a gear through an intermediate pinion, a gear wheel fixed to the driven stage of the mechanism. The intermediate pinion is movable to engage both the gear wheel and gear to transmit drive from the motor to the driven stage but is actuable to discontinue such drive. The auxiliary drive is intended to provide a means whereby the driven stage may be run at a speed lower than its normal operating speed, a particular application being to conveyors of the scraper chain type which at times require tensioning or detensioning of the chain for maintenance purposes, but at speeds lower than can be achieved using the main drive motor.

Abstract: A press drive mechanism is disclosed having brake and clutch units including corresponding disc assemblies concentric with respect to the output shaft of the mechanism. A fluid operated piston-cylinder assembly concentric with the output shaft is operable to alternately actuate the brake and clutch units, and an auxiliary fluid operated piston-cylinder assembly is selectively operable to effect simultaneous actuation of the brake and clutch units.

Abstract: A power drive assembly having a housing, a drive mechanism removably installed in the housing, an annular biasing spring installed in the housing for biasing the mechanism, and a wear ring arrangement including an undercut annular groove in the mechanism opening coaxially toward an end of the biasing spring and a wear ring removably installed in the groove to engage the end of the biasing spring in the assembled arrangement of the power drive assembly. The wear ring has a cross section complementary to the undercut groove cross section whereby the mechanism may be installed in the housing with the groove opening downwardly and the wear ring maintained in the groove for facilitated assembly of the power drive.

Abstract: A power take off, especially for an agricultural or construction type vehicle, in which an input shaft and an output shaft have a train of meshing gears extending therebetween with a normally disengaged friction clutch having input and output parts interposed between the input shaft and the first gear of the train. A brake is provided having a brake body normally engaging the output part of the friction clutch. The brake structure is supported in a stationary tubular element which also forms the journal means for another gear of the series of meshing gears. Fluid operable means are provided for actuating the clutch toward engaged position and the brake toward disengaged position.

Abstract: A modular steering clutch and brake pack for use in a vehicle power drive system. The clutch pack and brake pack comprise independent assemblies with a carrier removably disposed therebetween. The brake pack is removably bolted to a first housing and the clutch pack is removably bolted to a second housing. The brake pack includes a plurality of brake plates and the clutch pack includes a plurality of clutch plates. The carrier further defines a mandrel for maintaining alignment of the brake plates and the clutch plates during adjustment thereof in the make-up of the clutch and brake assembly. Suitable bearings are provided on the carrier for journaling the brake pack and clutch pack. The carrier may be splined to selected plates of the brake pack and clutch pack and to the output shaft of the power drive system.

Abstract: A brake assembly for large mechanical presses of the type which employ large gears and operate at relatively high speeds. The brake assembly is especially adapted to reduce noises emanating from the brake housing of such presses due to sudden shocks and stresses placed on the mechanical gearing and drive means of the press when the reciprocating slide of the press delivers its power stroke for performing work functions on a workpiece supported on the bed of the press. The brake assembly and the clutch of the press are coupled to the main driveshaft of the press, and the brake assembly may comprise an integral unit with the clutch or it may be a separate unit.

Abstract: High and low speed clutch assemblies are spaced apart along a rotatable shaft. Each of the clutch assemblies includes a plurality of annular friction plates which may be engaged by movement of annular pistons. A brake assembly is mounted between the clutch assemblies and includes friction surfaces carried about the rotatable shaft and annular brake plates mounted on opposite sides of the friction surfaces. A stationary housing is mounted about the brake assembly. Adjacent ones of the pistons and the brake plates are interconnected, such that the friction surfaces of the brake assembly are disengaged when either of the clutch assemblies are engaged by application of fluid pressure. The pistons and brake plates are spring-loaded such that when both of the clutch assemblies are disengaged, the brake plates move to engage the friction surfaces with the stationary housing to brake the shaft.

Abstract: A winch drum carrying a cable is supported by drive mechanism which includes a normally disengaged drive input clutch that is engageable in response to pressurized fluid to reel in cable. A normally engaged disconnect clutch disengages in response to fluid pressure to free the drum for rotation independently of the drive mechanism. A normally engaged brake immobilizes the drive mechanism except when released by fluid pressure. A control valve provides for directing pressurized fluid to appropriate ones or combinations of the clutches and brake as necessary to establish any of four operational conditions including Reel-In, Brake-On, Brake-Off and Disconnect modes of operation. A check valve between the flow lines that connect the control valve to the input clutch and to the brake assures that there is no momentary overlapping of engagements of both the input clutch and the brake when the Reel-In mode of operation is initiated or terminated.

Abstract: An internal combustion engine has a projecting crankshaft on which a sleeve is mounted for supporting a set of annular clutch plates disposed in interfitting relation with a set of annular clutch discs. The clutch discs are mounted on a cooling fan support shaft which is aligned with the crankshaft and is rotatably supported by a clutch housing secured to an oil pump housing mounted on the engine block. The lubricating oil for the engine is also pumped axially through the sleeve and outwardly between the clutch plates and discs which are movable between a clamped position and a released position in response to axial movement of an air actuated non-rotating annular piston surrounding the crankshaft. The piston may also be actuated to engage an annular brake surrounding the crankshaft when it is desired to brake the output shaft and prevent rotation of the cooling fan.

Abstract: A power drive assembly having a housing, a drive mechanism removably installed in the housing, an annular biasing spring installed in the housing for biasing the mechanism, and a wear ring arrangement including an undercut annular groove in the mechanism opening coaxially toward an end of the biasing spring and a wear ring removably installed in the groove to engage the end of the biasing spring in the assembled arrangement of the power drive assembly. The wear ring has a cross section complementary to the undercut groove cross section whereby the mechanism may be installed in the housing with the groove opening downwardly and the wear ring maintained in the groove for facilitated assembly of the power drive.