Abstract: A transmission case has a wall portion defining an oil pressure chamber of a fluid operated friction device, and an end portion having a threaded hole receiving a bolt for fastening a side cover to the case. In order to make the wall portion impervious to oil notwithstanding defects formed by casting, the wall portion is separated from the end portion by a U-shaped groove. Furthermore, the end portion is shaped into an outward flange through which the threaded hole passes from one side to the other.

Abstract: A slip control system for a torque converter of an automatic transmission includes lock-up clutch device provided in a torque converter for connecting an input and output members of the torque converter directly. A torque detecting device detects a transmitted torque introduced into the output member of the torque converter, a speed difference setting device sets a target value of a rotation speed difference between the input and output members, a pressure difference control device controls a pressure difference between a releasing chamber and an engaging chamber of the lock-up clutch device, based on a predetermined relationship between the input torque and the speed difference so as to accomplish the target value of the speed difference, and a speed difference detecting device detects an actual speed difference between the input and output members.

Abstract: A method of controlling a speed changing operation wherein the method is preferably employable for a caterpillar drive type construction machine including a direct transmission is disclosed. When a shift-up speed changing operation is to be performed, the method is practiced by way of the steps, i.e.

Abstract: A hand operated automobile brake and accelerator operation assembly for the handicapped can be readily transferred from car to car without tools and is adaptable to various models of cars. It is installed by clamping onto the brake pedal shaft with manually operable wing nuts or the like as the sole fixed connecting bracket on the car. The brake pedal and accelerator pedal are respectively operated by pushing and pulling by hand an operating rod to move an operating lever fulcrumed on a pivot axis fixed relative to the brake pedal shaft. This operating lever moves an accelerator operating shaft into contact with the accelerator pedal to depress it as the hand operated rod is pulled. Conversely when pushed the hand operated rod depresses the brake pedal and release the accelerator. To accommodate different car models an accelerator operating shaft has a manually operated lock to fix its length, and the acclerator assembly distance from the brake is adjustable.

Abstract: An operation control system of an automotive working vehicle has a self-resetting switch as a switch for stationary operation and a self-holding circuit. The self-holding circuit is set by operating the self-resetting switch to a predetermined set state when the following predetermined conditions are satisfied: detection of a driver's seat being unoccupied, detection of a transmission being in neutral, and detection of a PTO shaft for stationary operation being selected. In the predetermined set state of the self-holding circuit, the engine of the automotive working vehicle can operate even when a PTO clutch is engaged, provided that the above predetermined conditions are satisfied. In another form of the invention, the predetermined conditions further include detection of a parking brake being locked.

Abstract: In a lock-up torque converter, first and second input shells are rotatable and axially movable relative to each other. The second input shell is integrally provided with a pump impeller. A turbine runner is rotatable but axially fixed relative to an output shaft. A first clutch engages the turbine runner with a lock-up clutch plate during disengagement of the lock-up clutch plate from the first input shell and disengages the turbine runner from the lock-up clutch plate during engagement of the lock-up clutch plate with the first input shell. A second clutch engages the first and second input shells while allowing them to be axially movable relative to each other during disengagement of the lock-up clutch plate from the first input shell and disengages the first and second input shells during engagement of the lock-up clutch plate with the first input shell.

Abstract: A viscous coupling having a flushing pump for a drive assembly, in which the abrasion particles occurring as a result of friction between the plates are flushed out of the coupling housing. This is achieved by connecting the viscous coupling to a storage and a supply channel, and the flushing pump is driven as a result of relative movement of the two sets of plates in the viscous coupling and ensures that the viscous fluid flushes the interior of the viscous coupling.

Abstract: A fluid coupling device is provided of the type including a housing member (15) and a cover member (17), and a valve plate (31) disposed therebetween to define a fluid operating chamber (33) and a fluid reservoir chamber (35) containing fluid defining a fluid level (F), when the device is shutdown in the disengaged condition. The valve plate defines a discharge opening (47) through which fluid is pumped from the operating chamber back into the reservoir. In accordance with the invention, the cover member (17') defines an annular groove (57; 57'), including a upstream portion (59; 59'), and the cover defines a downstream portion (67; 67') in open communication between the annular groove and the reservoir. The circumferential extent of the annular groove is at least about 180 degrees, such that either the upstream portion or the downstream portion is above the fluid level for any rotational orientation of the device.

Abstract: The invention relates to a viscous coupling 1 in the case of which one of the two coupling parts, i.e. either the coupling hub 9 or the coupling housing 2, is produced of plastics. To permit non-rotating accommodation of the associated coupling plates 11 or 12, metallic round bars 18 are embedded in the plastic coupling part 2 or 9 so as to be circumferentially distributed. The inner circumference or the outer circumference of the associated coupling plates 11, 12 is provided with an adapted profile. This measure ensures that in spite of the high loads occurring in the course of the transmission of torque it is possible to use plastic parts.

Abstract: A clutch/brake system for a manual transmission motor vehicle, having an additional brake master cylinder attached to the conventional clutch master cylinder, and associated hydraulic lines and valves whereby depression of the clutch pedal first causes disengagement of the clutch, and then causes engagement of the brakes through engagement of the additional brake master cylinder. The system is particularly useful when starting a vehicle on an upward incline, to allow the operator to prevent the vehicle from rolling backward when one foot must be on the clutch pedal while the other is on the accelerator pedal. The system is also useful in the event that a sudden stop is necessary while the operator is using the clutch pedal for frequent gear shifting, as in heavy traffic.

Abstract: Magnetic flux produced by an electrically energized coil threads radially between a housing and a flange on a rotatable shaft, threads axially between the flange and a control collar for the clutch, threads radially between the control collar and an input hub via a helical spring contracted around the hub, and threads axially between a flange on the hub and the housing to complete the flux circuit. Flux cutting axially between the flange on the shaft and the control collar causes the control collar to shift axially into engagement with the flange so as to effect turning of the collar relative to the input hub and contraction of the spring around an output hub.

Abstract: The core of a liner displacement transducer is coupled to a rotatable movable member by a threaded stem which engages the member for rotation therewith and is axially slidable relative thereto. The stem threadedly engages a nut which is axially located on a fixed part of the transducer and is restrained against rotation by a spring loaded detent. Projections on the stem are engageable with respective abutments on the nut at opposite limits of linear travel of the stem, causing the nut to rotate and preventing further change in the position of the core.

Abstract: A pin-type, double-acting synchronizer mechanism (22) with friction clutches (24,36 and 26,38), jaw clutch (28,14b and 30,16b) and self-energizing ramps. The ramps act between a shaft (12) and a shift flange (32) which is rotatable relative to the shaft and jaw clutch members 28,30. Flange 32 includes radially inwardly extending teeth (32k) defining self-energizing ramps (32m,32n,32p,32s) which act against ramp (12d,12e,12f,12g) formed in shaft splines (12b). Three circumferentially spaced pins (40) include blocker shoulders (40c,40d), for preventing asynchronous engagement of the jaw clutches and pre-energizer surfaces (40e,40f) which each cooperate with a pre-energizer and neutral centering assembly (42). The angles of the self-energizing ramps may be varied to provide substantially the same synchronizing time for several or all of the ratio gears in a multi-ratio transmission.

Abstract: A locking mechanism and system for a vehicle shifter in which the shifting lever is locked in a park lock position until the brakes of the automotive vehicle are applied and/or the steering lockout mechanism located in the steering column of the vehicle is released by the ignition key of the vehicle. In one embodiment of the invention the pawl of the shifting lever is restrained by a lockout arm through which the brake mechanism and the lockout cable extending to the steering column are connected. In another embodiment, the lockout cable is eliminated by providing two electrical control modules operatively connected to the brake mechanism and the ignition key switch which controls the steering lockout mechanism. These two modules are connected in a unique circuit so that the shifting lever cannot be shifted out of park to other gear positions until the brake is applied and the steering lockout mechanism is released by the ignition key switch.

Abstract: A power transmission mechanism for a motorized hand tool, comprising a socket, a first spring set in said socket, a first rotary member inserted in said socket and stopped against said first spring, a revolving shaft inserted through said first rotary member, said first spring and said socket and connected to a power unit, a second rotary member inserted in said first rotary member, a cap attached to said first rotary member at an opposite end, and a second spring retained between said second rotary member and said cap, wherein said gap and said first rotary member are forced to move backwards toward said socket, when the resisting force which acts onto said tool surpasses the driving force from said revolving shaft, causing said second rotary member to disconnect from said first rotary member and said revolving shaft.

Abstract: A dual flywheel structure has a primary flywheel driven by an engine and a secondary flywheel, selectively driven by the transmission input shaft, the secondary flywheel is disconnected from rotation with the transmission input shaft when the transmission input clutch, between the engine and transmission, is disengaged.

Abstract: A clutch cover assembly includes a cover connected to an input drive member, a pressure plate arranged in and connected to the cover, a clutch disk disposed between the pressure plate and the input drive member, a diaphragm spring disposed between the cover and the pressure plate and biasing the pressure plate in the direction of the clutch disk, and a stopper provided at an inward bent portion of the cover and preventing the diaphragm spring from moving in the direction of the clutch disk by more than a certain stroke. The diaphragm spring is prevented from pressing on the clutch disk when the clutch facing is damaged.

Abstract: A pressure control system for a lock-up clutch includes a variable flow restriction orifice disposed in a lubricating circuit. The variable flow restriction orifice is operated depending upon a discharge rate of an oil pump so that working fluid flow through the lubricating circuit is restricted when the discharge rate of the oil pump is smaller than a predetermined value.

Abstract: A twin clutch having two clutch discs between a flywheel and a pressure plate and having an intermediate plate between the two clutch discs. In an engaging operation of the clutch, a flywheel-side clutch disc is first held between the intermediate plate and the flywheel, and a pressure-plate-side clutch disc is then held between the pressure plate and the intermediate plate.

Abstract: An electromagnetic spring clutch has an armature (40) which can be moved to and from in the axial direction thereof and cannot be rotated on the axis, and which is biased by a spring (46), and a coil spring (36) which covers over outer faces of a master driving axle (30) and a slave driving axle (34) and which is capable of being wound tightly in the rotational direction of the master driving axle (30). When an electromagnetic coil (20) is not energized, an engagement section (44a) at the end of the armature (40) and a hook (38) of the coil spring (36) are engaged to expand the inner diameter of the coil spring (36) and disconnect the master driving axle (30) and the slave driving axle (34).