Abstract: Torque is normally transmitted between driving and driven members of a ratchet-type slip clutch by a plurality of equiangularly disposed banks of radial pins reciprocably mounted in a cylindrical hub of the driving member and normally spring biased into the bottom of a plurality of equiangularly disposed pockets located in a cylindrical shell of the driven member. Located so as to cooperate to operate completely out of phase relative to the operation of the pins and associated pockets for transmitting torque during normal operation of the clutch so as to maintain positive torque transfer during slipping operation of the clutch is a snubbing mechanism comprising a further set of pins reciprocably mounted in the cylindrical hub and having associated pockets located in the cylindrical shell.

Abstract: A torque limiting wrench is provided having an input member and an output member coupled to each other so as to limit the transmitted torque therebetween. The coupling is provided by spring rods supported in the output member surrounding the input member, the spring rods being arranged along a pitch circle disposed concentric with respect to the input member and, in the tension-free state, disposed within the zone of axial catches arranged on the circumference of a collar provided on the input member. When a sufficient input torque is admitted, the spring rods are bent outwardly by the flanks of the catches and out of the range of the catches when the predetermined torque is reached.

Abstract: A drive assembly including first and second shafts, the shafts being normally aligned axially in an end to end relationship, a connector portion operatively connecting adjacent ends of the first and second shafts, the connector portion including a resilient section extending between the adjacent ends of the first and second shafts, a first end section extending from one end of the resilient section, the first end section including an axial opening, the adjacent end of the first shaft engaging and being affixed within the first end section opening, a second end section extending from the opposite end of the resilient section, the second end section including an axial opening, the adjacent end of the second shaft engaging and being affixed within the second end section opening; whereby the connector portion provides a flexible positive drive connection between the first and second shafts.

Abstract: An electric hoist includes an electric motor, a driving shaft connected to a rotor shaft of said electric motor, a reduction gear train for transmitting rotation of the driving shaft to a load sheave, and a mechanical brake assembly in the reduction gear train.

Abstract: A hoist includes a shaft driven by external force, a driving shaft connected to the shaft, a reduction gear train for transmitting rotation of the driving shaft to a load sheave, and a mechanical brake assembly in the reduction gear train. According to the invention in the reduction gear train is arranged an overload safety device comprising a driven gear having a one-way clutch and rotatively driven by the driving shaft and radially inward and outward dual friction plates located between the driven gear and an element of the mechanical brake assembly so as to transmit torque through the radially outward friction plates in winding-up and through both the radially inward and outward friction plates in winding-off. With this arrangement, the electric hoist according to the invention is able to automatically prevent lifting, lowering and dragging a load under overload condition, and enables the once lifted load to be securely lowered irrespective of its light or heavy weight.

Abstract: Clutch engagement members radially movable to bring a clutch sleeve and a clutch hub into and out of driving engagement are displaced by radially movable spring loaded cam members having inner contact faces which engage cam surfaces on the radially inner ends of the engagement members, the cam surfaces on the engagement members being formed to include a first cam surface extending obliquely relative to the direction of movement of the cam members at a different angle than a second cam surface.

Abstract: A freewheeling clutch assembly wherein pawl members are mounted for pivotal movement in one of a driven and driving member of the clutch assembly and wherein ratchets are formed in the other member. When the driven member overruns the driving member, pivotal movement of the pawls causes their disengagement with the ratchets and the clutch will freewheel. When the driving member commences again to overrun the driven member, resilient annular means interposed between the members will cause the pawl members to be pivoted back into their torque transmitting position.

Abstract: A clutch particularly suitable for machine drives in agricultural implements including a clutch hub, a clutch sleeve, and spring-loaded dog members operative to engage and disengage within tapered recesses in said clutch sleeve for controlling torque transmission through the clutch. The recesses are formed with a circumferential dimension large enough to accommodate therein movable control members together with engagement heads of the dog members. The control members cooperate with the dog members within the recesses to effect disengagement of the clutch when a maximum torque is exceeded and to automatically effect re-engagement of the clutch upon achievement of a nominal speed whereupon the dog members, which are spring-loaded in the clutch hub, may automatically re-engage within the recesses.

Abstract: This disclosure relates to a torque limiter for use in connecting a rotational drive to a part to be driven.

Abstract: A valve structure is provided which can be opened and closed under operating conditions without any adjustment in conditions existing in the system in which the valve is an element. The valve element can be turned with respect to the seat to provide for proper relation between the valve element and the valve seat to grind one with respect to the other during the operating cycle. The valve also includes a clutch having a radial acting trip overload that prevents the valve seat from being damaged during grinding which is effected by turning the valve through the clutch while moving the valve toward the seat during the closing cycle and produces a controlled grinding operation independent of pressure within the valve.When the valve is operated in the opposite direction, the clutch disengages and the actuator mechanism encounters only the thrust forces during the opening cycle. This allows the valve to be easily opened without overloading the system.

Abstract: This torque-limiting drive coupling in the annular hub of a drive sprocket has an oppositely-disposed pair of oblique internal notches in one of which is tightly seated one end of a steel driving leaf spring, the opposite end of which loosely fits the opposite notch. The central portion of this spring resiliently engages one of the flat sides of a hexagonal driven shaft for driven transmission of a conveyor roller mounted thereon under normal circumstances. This leaf spring, however, yields so as to slip over the corner ridges between the flat sides of the hexagonal shaft so as to permit the sprocket to continue rotation upon anti-friction bearings pressed therein while the shaft is halted or slowed by an obstacle, such as work accumulating on the rollers of an accumulating conveyor driven thereby.