Abstract: A friction clutch includes side plates connected to an output hub and being adapted to receive a torque through a friction facing from a flywheel of an engine, and a clutch cover supporting a control mechanism of the clutch. At least one of the clutch cover and the side plates is integrally provided at outer peripheral portions with small portions which are surrounded by a groove and a slot connected to the groove so that one or more of the small portions can be removed for balancing the clutch in an unbalance-correcting process. The side plates are rigidly connected together by stop pins and are connected to the hub through springs disposed in openings formed in the side plates and a radial flange of the hub. One of the side plate is provided at outer peripheral portions circumferentially between the openings and the stop pins with the small portions.

Abstract: A clutch for a cooling fan for a motor vehicle and method of making the same are provided, the clutch comprising a shaft having a knurled portion that press-fittingly receives an inner race member of a bearing, the shaft having a solid ring shaped portion disposed adjacent the knurled portion and being provided with an outer diameter about equal to that of the outer diameter of the knurled portion and having part of the inner race member of the bearing press-fitted thereon whereby the solid ring shaped portion is adapted to block the flow of viscous fluid out of an enclosed chamber of a housing of the clutch by way of the slots which define protuberances of the knurled portion.

Abstract: A friction clutch wherein a clutch disc is disposed between a flywheel, and a pressure plate fixed to the flywheel via a clutch cover secured to the flywheel, such that the clutch disc is normally held in pressed contact with the flywheel and pressure plate, with the pressure plate biased by a diaphragm spring against the clutch disc. The diaphragm spring engages the clutch cover at its outer end and engages a releasing member at its inner end, such that the spring normally biases the pressure plate at its intermediate portion. The clutch disc is released from the flywheel and pressure plate when the releasing member is operated to free the pressure plate from the biasing action of the spring. The friction clutch has a stopper device for limiting a maximum permissible length of axial displacement of the pressure plate toward the clutch disc due to wear of the clutch disc. This length is determined to the smaller than X.multidot.

Abstract: The clutch disc for a motor vehicle friction clutch comprises a friction lining carrier mounted rotatably on a hub, a torsional vibration spring means and a torsional vibration friction damper. The friction damper is arranged between side discs of the friction lining carrier and includes a spring of annular disc form and at least one friction ring seated in the support path. The installation height of the axially acting spring is variable after the assembly of the clutch disc, by an adjusting device. The adjusting device can be two adjusting elements rotatable in relation to one another, which vary the installation height of the spring by steps or steplessly. The adjusting device can also comprise permanently deformable adjusting elements or adjusting elements seated with press fit on the hub.

Abstract: A viscous coupling for a drive shaft has an elongated tubular first shaft and an elongated cylindrical second shaft extending into and cooperating with the first shaft to define a cylindrical clearance therebetween. Bearings for accommodating both relative rotation and axial displacement of the first and second shafts are interposed therebetween at opposite ends of the clearance. Seals are associated with the bearings to hermetically seal the ends of the clearance, which is filled with a viscous fluid. The viscous resistance of the fluid to rotation of one shaft relative to the other provides a means of transmitting torque therebetween.

Abstract: An electromotive control drive mechanism, in particular for industrial sewing machines, comprises a continuously drivable motor and a brake/clutch unit connected therewith. A clutch disk connected in a rotationally fixed manner with a driven shaft can, by axial movement and by overcoming a clutch air gap, be brought into frictional engagement with a clutch support which is connected in a rotationally fixed manner with the rotor of the motor. A brake disk connected in a rotationally fixed manner with the driven shaft can be brought into frictional engagement with a brake support which is rotationally fixed. A clutch coil and a brake coil are also provided. In order to reduce the expense of the brake/clutch unit without burdensome actuation noises arising, only one clutch/brake disk is provided, and mechanisms are provided for adjusting the clutch air gap and the automatic readjustment of the clutch air gap.

Abstract: There is disclosed a transmission structure for an agricultural tractor wherein a clutch housing and a gear transmission case are interconnected by a transmission housing formed of sheet metal. The transmission housing contains an inner and outer double shaft construction comprising a propelling system drive shaft and a power takeoff system drive shaft. These drive shafts are connected to corresponding input shafts extending from the gear transmission case by means of a ball coupling and a flange type elastic coupling, respectively.

Abstract: A shim cap device provides an apparatus for achieving clutch lever adjustment. In a preferred form, a plurality of shim caps are each selected for an appropriate thickness of a shim portion thereon. Each selected cap is interposed between one tail end of the several clutch release levers and a pressure plate boss normally directly engageable by that particular tail end. Each shim portion has a selective thickness for the purpose of establishing an initial adjustment of each associated clutch release lever. In a preferred form, the shim portion of each cap is disposed for planar contact with the radial surface of its associated boss, and is integral with a wall portion disposed orthogonally to the shim portion. The wall portion extends about the perimeter of the shim portion for press fit engagement of the sides of the associated boss.

Abstract: A friction clutch wherein the mechanical advantage or lever ratio can be varied without changing the construction of the release levers. This is achieved by changing the location of the pivot pins that connect the levers to the pressure plate, and by elongating the release lever holes through which the pivot pins pass. Changing the location of a pivot pin with respect to its supporting lugs on the pressure plate will cause a change in the location of the pin along the length of the elongated pivot pin holes in its corresponding release lever, and this in turn operates to change the mechanical advantage exerted by the lever on the pressure plate.

Abstract: The clutch disc for a motor vehicle friction clutch comprises a friction damper with friction linings resiliently braced in axially between disc parts. The friction linings have surface regions with different coefficients of friction which can be brought into operative engagement according to choice by control means for the adjustment of the friction torque of the friction damper. In this way the friction torque can be adjusted for the compensation of construction tolerances of the clutch disc, without variation of the spring stress of the friction damper.

Abstract: The clutch disc for a motor vehicle friction clutch comprises a hub and a friction lining carrier mounted rotatably on the hub. A torsional vibration spring means is arranged in the torque transmission path between the friction lining carrier and the hub. A torsional vibration damper comprises at least two friction elements lying axially resiliently flat against one another. One of the friction elements is connected non-rotatably with the hub and the other friction element is connected non-rotatably with the friction lining carrier. One of the friction elements is held displaceably in the radial direction, along the friction face of the other friction element, on the hub or the friction lining carrier. By radial adjustment of the friction element the friction torque can be adjusted and construction tolerances of the clutch disc can be compensated.

Abstract: The pedal carrier is so arranged as to permit mounting it and dismantling it in an easy manner with no use of a tool. For this purpose, each end of the pin (7) carrying the pedals is engaged in a sleeve (10,11) including a generally circular-shaped bearing surface (12) with two parallel flat portions, each bearing surface cooperating with the inner contour of an aperture (15) which has the same diameter and is provided in the side wall and communicates with the edge of this wall through a passage whose width is slightly greater than the distance between the flat portions, means being provided for immobilizing the assembly formed by the pin (7) and the sleeves (10,11) relative to the side walls (5, 6).

Abstract: A clutch assembly for automobiles and includes a clutch mechanism, a pivotally mounted operator coupled to the clutch mechanism and pivotable between positions that alternatively produce either engagement or disengagement thereof, a pivotally mounted actuator, and a hydraulic control comprising a piston coupled to the actuator and operable to produce pivotal movement thereof. Also included is an operator positioning means for establishing a predetermined position of the operator and adapted to permit pivotal movement thereof from said predetermined position, an actuator positioning means for establishing a given position thereof relative to the operator means and adapted to permit pivotal movement of the actuator positioning means from the given position, and a manually adjustable coupling operatively coupling the operator and the actuator.

Abstract: An activating device, in particular a clutch activating device for vehicles equipped with a clutch pedal mounted on a stationary pivot. The clutch pedal is connected to a drive mechanism controlling the activating force of the pedal. The drive mechanism includes a control lever on which an intermediate lever connected to the clutch pedal is held. The drive mechanism includes a first lever joint with the control lever, which is acted upon by a compression spring and which is swivel mounted on a stationary pivot, as well as the attached intermediate lever. This forms a second lever joint with an activating lever of the pedal. The assembly forms an increasing effective lever arm when the pedal is depressed such that the activating force of the clutch pedal is maintained at a substantially constant level for at least a portion of the clutch disengaging process.

Abstract: A clutch cover for use in a clutch assembly wherein a plurality of balance adjusting portions are provided at a periphery of a flange, and the balance adjusting portions are press-formed as bosses or connected to the main body of the clutch cover with deep grooves so that an imbalance of the clutch can be easily corrected or reduced on production line of clutch by removing certain balance adjusting portions.

Abstract: A method is disclosed for adjusting a plurality of release levers in a friction disc clutch. The method ensures that the inner or nose ends of the release levers lie in a common plane upon final clutch assembly. In a preferred form, rivets of varying head thicknesses are affixed to the nose ends of the release levers, one rivet per each lever, each selected according to an actually measured amount of axial deviation in the nose end to which it is to be affixed. Each rivet is preferably visually identifiable by color or other marking to indicate its specific head thickness, which corresponds to an expected deviation range. The invention therefore provides a mass production technique which ensures adjustment of inner nose ends of release levers during the assembly of a friction disc clutch, whereby the inner nose ends of the release levers thereof will lie in a common radially extending plane.

Abstract: The bidirectional, torque-limiting, drive and brake mechanism has an input and output drive shafts and a helical spring which is normally in interference fit with the mechanism housing and, in the torque transmitting mode of operation, is disengaged to permit torque transmission by a direct mechanical coupling between the input and output drive shafts. The torque-limiting component, which functions to interrupt transmission of rotation from the input drive shaft to the output drive shaft upon a predetermined torque load, is adjustable to a selected predetermined torque load in the field.

Abstract: An operation device of a clutch master cylinder including a clutch master cylinder slidably incorporating therein a piston and a clutch lever pivotally supported by a pivot on a lever holder and having a piston operating arm. The clutch lever has a bearing hole formed substantially parallel to the pivot and a rotor is turnably fitted into the bearing hole. A push rod which comes into contact with the piston so as to be able to rock is interconnected to the rotor. To adjust the play stroke of the clutch lever, the length of the push rod is adjustable in one embodiment of the invention. In another embodiment, the pivot is fitted to a shaft hole of the clutch lever and the axis of the pivot is eccentrically disposed with respect to the center of the shaft hole.

Abstract: An electromotive control drive mechanism, in particular for industrial sewing machines, comprises a continuously drivable motor and a brake/clutch unit connected therewith. A clutch disk connected in a rotationally fixed manner with a driven shaft can, by axial movement and by overcoming a clutch air gap, be brought into frictional engagement with a clutch support which is connected in a rotationally fixed manner with the rotor of the motor. A brake disk connected in a rotationally fixed manner with the driven shaft can be brought into frictional engagement with a brake support which is rotationally fixed. A clutch coil and a brake coil are also provided. In order to reduce the expense of the brake/clutch unit without burdensome actuation noises arising, only one clutch/brake disk is provided, and mechanisms are provided for adjusting the clutch air gap and the automatic readjustment of the clutch air gap.

Abstract: An adjustable pedal stop for an automotive clutch includes a stop member 20 which is moved along a ratchet 32 by the first full depression of the clutch pedal 12. The ratchet prevents return movement of the stop member so that the pedal stop 25 is set to a position which ensures a predetermined normal pedal position irrespective of manufacturing tolerances.

Abstract: A method and apparatus for making an axially adjustable connection between a clutch shaft and an armature assembly to enable axial adjusting movement of the armature plate relative the inner body magnetic pole face to precisely set the air gap spacing through which an electromagnetic coil attracts the armature plate into frictional driving engagement with the inner body pole face. The hub of the armature assembly is placed upon the clutch shaft and a feeler gage is positioned between the pole face and the armature plate to establish the desired air gap spacing. An adjusting nut is threadedly advanced along a thread of the clutch shaft for progressive axial advance in the direction toward the inner body and engages the hub to maintain the armature assembly against air gap increasing movement away from the pole face.

Abstract: A friction clutch for a conveyor roller bearing apparatus wherein a plurality of small thrust springs are disposed between an adjustable nut and a thrust pad to force a drive sprocket against a back-up friction pad connected to the roller axle shaft. Means such as sleeves around the springs or pins between the nut and thrust pad are provided to minimize or eliminate sideloading on the springs. The faces of the thrust and back-up pads are centrally relieved to concentrate the thrust forces in a band which corresponds with the radial locations of the thrust springs. By this arrangement a very uniform breakaway or release torque characteristic is provided about 360.degree. of relative angular travel between the components.

Abstract: A method is disclosed for constructing and adjusting a plurality of release levers of a friction disc clutch. The method ensures that the inner or nose ends of the release levers lie in a common plane upon final clutch assembly. In a preferred embodiment, a rivet is secured to the nose end of each release lever. The resulting lever unit is heat treated in a manner wherein the attached rivet is hardened throughout its entirety, while the lever per se is case hardened to a specified depth.Next, a clutch cover, pressure plate, pressure means for urging the plate, and the plurality of heat treated lever units are installed together to form a clutch cover sub-assembly. Relative movement between the clutch cover and pressure plate is effected against the bias of the pressure means until the levers are in an extreme position relative to the clutch cover.

Abstract: A friction clutch wherein the area pressures on the friction linings can be adjusted within a predetermined range while ensuring an even distribution thereof is provided with an adjustable supporting ring acting to vary the spring pressure within said clutch, the adjustable supporting ring being provided on the surface of the clutch housing and having tongues which point radially outwardly but which extend at an oblique angle to the axis of the clutch which may be turned in one or another direction in order to increase or decrease the nominal torque of the clutch.

Abstract: A pneumatically or hydraulically operated clutch brake assembly for coupling a load to a motor is disclosed.

Abstract: A hydraulically operative clutch type transmission especially for industrial and loading vehicles comprises a casing accommodating shift gear mechanism therein, a housing connected to the casing, an input shaft journalled to the housing, a main shaft connected to the input shaft, a gearing member, a hydraulically operative clutch device which comprises a clutch drum connected to the main shaft and a clutch hub connected to the gearing member, a washer plate interposed between the gearing member and sleeve end of the clutch drum, the main shaft including a large diameter portion having a notch with a plain surface, and a small diameter portion, a gear member of the gearing member being rotatably supported on the large diameter portion, the clutch drum mounted on the small diameter portion, and the washer plate including a fasting portion which is engaged with the notch.

Abstract: An electromagnetic spring-wound clutch includes a first rotary member formed of a hub having an annular flange and a tubular portion integrally combined with the hub and adapted for direct coupling to a rotary shaft of an apparatus for use with the clutch. The tubular portion of the first rotary member is concentrically and rotatably fitted through a stationary annular field core which accommodates an electromagnetic coil and is arranged in facing relation with the annular flange of the hub. A non-magnetic annular member is rigidly fitted on the hub, and an armature is rotatably fitted on the hub and interposed between the annular flange and the annular member. A coil spring is wound around the annular member and a second rotary member rotatably fitted on the tubular portion of the first rotary member, for gripping engagement therewith.

Abstract: In a fly wheel power press having a rotatable drive shaft mounted in a housing and with an H-shaped yoke to which pivot pins are mounted and from which a pair of clutch shoes and brake shoes depend, an adjustment mechanism having a knurled portion on the pin and a cooperating knurled aperture in a lock plate which is in sliding engagement with the knurled portion of the pin so as to permit securement of the lock plate, and thereby the clutch and brake shoes, in a pre-selected adjusted position to one of the uprights is disclosed.

Abstract: This invention pertains to a shaft drive arrangement having an inner shaft which has a first end and a second end. There is also an outer shaft concentric about the inner shaft. The outer shaft has a first end, a second end, and a middle. A clutch means for transmitting rotary power between the inner shaft and outer shaft is provided. The clutch means is cantileverly mounted on the second end of the shafts. A first transmission means for transmitting torque is mounted on the second end of the inner shaft. A second transmission means for transmitting torque is mounted about the middle of the outer shaft.

Abstract: A device for shaft alignment in a clutch or brake assembly is shown according to the teachings of the present invention. A quick demount bushing for receipt upon the shaft is provided having an outer tapered surface for receipt in an inner tapered bore formed in the assembly. The present invention further includes a shaft mount for receipt upon the shaft and into an axial bore of the assembly for holding the shaft in axial alignment with the assembly during placement of the quick demount bushing in the assembly whereby the friction surfaces are parallely disposed and normal to the longitudinal axis of the shaft. The shaft mount according to the teachings of the present invention is formed of a one piece bushing have a fixed thickness in the radial direction and also in the axial direction.

Abstract: A push rod assembly for a clutch master cylinder having a rod in abutment with a piston of the clutch master cylinder, a clevis operatively connected to a clutch pedal, and a rubber vibration isolator interposed between the rod and the clevis wherein the rod is formed by stamp forging, the clevis is formed by press working and the rubber vibration isolator is secured to the rod and the clevis during forming thereof, thereby decreasing the resulting cost and increasing the intensity of adhesion thereof.

Abstract: A hydraulic clutch actuator has two pistons operatively connected to a force transmitting member which abuts the clutch throw out bearing. The pistons are slidably disposed in respective cylinders which are formed in a housing and interconnected by passages also formed in the housing, whereby pressurized fluid can be delivered to the cylinders. The pistons, when pressurized, slide along their respective longitudinal axes which are parallel to each other and also parallel to and radially displaced from the axis of the clutch output shaft. Each piston has a hook portion on the end thereof, which engages the force transmission member and a flat surface formed parallel to the longitudinal axis for a portion of the piston length. The flat surface cooperates with a pin secured in the wall of the cylinder so that rotation of the piston in the cylinder is prevented.

Abstract: Coupling apparatus for rotatably coupling an input shaft to an output shaft includes an outer assembly having a pair of inner conic friction surfaces mounted for rotation with the input shaft, a pair of opposed annular piston members located within the outer assembly defining a space between them, each of the annular piston members being connected to the output shaft and one of a pair of friction elements having outer conic friction surfaces. A pressurized fluid is directed into the space between the annular piston members to move the same away from each other against the force of respective cup-shaped springs whereby the outer friction surfaces of the friction elements engage the inner friction surfaces of the outer assembly to engage the coupling. A pin-fork arrangement is utilized to interconnect the output shaft with each of the annular piston members in a manner such that the output shaft, which is mounted in a bearing housed within the outer assembly, can be centered with respect to the outer assembly.

Abstract: An electromagnetic clutch device for torque transmission from an input means to an output means which incorporates an air gap adjustment feature between the pole faces and the armature during assembly of the clutch. The air gap adjuster permits the armature to be responsive to magnetic flux formed by a predetermined electromagnetic coil voltage without having to tear down the assembly if the predetermined coil voltage is exceeded at initial try-out. Means are also incorporated to compensate for wear of the torque transmitting material.

Abstract: A free travel adjusting device for a cable-operated clutch release system for an automobile. A cylindrical cable holder for holding a clutch cable is mounted through an impact absorbing member to a dash panel in the engine room of the automobile. The clutch cable has in its portion received in the cable holder an external thread with which a wing nut is threadedly connected. A means for preventing rotation of the wing nut is provided between the wing nut and the cable holder.

Abstract: A torsion spring clutch having coaxial clutch sections rotatable relative to each other, connected by a helical torsion spring which frictionally engages a conical portion of one of the clutch sections. A mounting portion is rotatable with respect to guide surfaces on one of the clutch sections to produce axial movement of the mounting section and spring for adjustment of the clutch force.

Abstract: An electromagnetic clutch comprises a pulley rotatable about a shaft, an armature which is axially movably connected to the shaft and faces a portion of the pulley so as to contact with electromagnetic force thereby coupling the pulley and the shaft, an electromagnet with a winding and a core which has cylindrical face coaxial of the shaft, a part of which core faces to a part of the pulley with small air gap so as to make magnetic circuit, a supporting member which has a cylindrical portion surrounding the shaft with a gap and rotatably supporting the pulley through a bearing, and a flange portion spreading out from the one end of the cylindrical portion. The supporting member is secured to the core of the electromagnet with the flange portion tightly inserted in the cylindrical face of the core, thereby defining an electromagnetic assembly in which a recess for engagement with a machine is formed.