Abstract: A mechanical, non-fluid-power clutch is disclosed. Inside a clutch housing, a cup element is fixed to a first shaft. First splined discs radiate inwardly from the cup. A second shaft, coaxial with the first shaft, has a second set of splined discs which radiate outwardly in an interleaved arrangement with the first discs, so as to form a disc stack. A collar cam is also carried by the cup element. This collar cam has a fixed element, and a movable element which can squeeze the disc stack and consequently couple the shafts. Interconnector balls move radially outwardly between the collar cam elements to effect the collar cam element movement and shaft coupling. The radially outward movement of the balls is caused by a sleeve cam telescoped upon the second shaft. The sleeve cam can be moved axially by a yoke arrangement, which is controlled by a lever located outside the housing.

Abstract: An hydraulic clutch comprises coaxial input and output shafts with driving and driven discs respectively mounted on the shafts. The mounting of the driven discs on the output shaft includes a one piece member having a cup with an annular wall that surrounds the input shaft and the driving discs. The one piece member also includes the output shaft. An hydraulic piston is used to engage the clutch discs; and pins, around which return springs are mounted, limit the throw of the piston. The arrangement tends to minimize turbulence, heat build-up, and power losses when the clutch is in the disengaged condition.

Abstract: A combination fluid power disc brake and one-way clutch unit is offered. An inner shaft is journalled in a stationary housing, and an outer shaft is journalled upon the inner shaft. A one-way clutch between the shafts causes the inner and outer shafts to rotate together as a unit when the inner shaft is rotated in one direction, but permits the inner shaft to rotate independently of the outer shaft when the inner shaft is rotated in the opposite direction. A disc brake assembly operates upon the outer shaft to selectively retard its rotation. The disc brake assembly is of a failsafe design, and permits outer shaft rotation when a positive hydraulic pressure is applied to the unit. If pressure is lost or removed, the brake is activated, and outer shaft rotation is halted.