English to Italian Law/Patents Mechanics / Mech Engineering clutches

... employ a variety of clutch mechanisms on various engine accessories, including cooling pumps, cooling fans and air conditioning compressors, which may be employed to selectively couple the engine accessory to a source of rotary power.

At least a portion of the rotary power input to be wrap spring is transmitted through an axial end face of the second end of the wrap spring and into a surface of the second rotary clutch portion against which the axial end face of the second end is abutted. Placement of the actuator member in the first position permits frictional engagement between two components of the clutch assembly that causes the first rotary clutch portion to tend to rotate with the input member such that the wrap spring drivingly engages the inner clutch surface and transmits rotary power to the second rotary clutch portion