Parker-Hannifin Corporation
Quick-Coupling With Automatic Locking Mechanism

Abstract:

An enhanced quick coupling configuration having a push-to-connect locking mechanism is provided in which holding the outer sleeve does not affect the ability to connect the coupling, and the outer sleeve otherwise does not need to be restrained by additional components. The locking mechanism also does not require the coupling components to overtravel during connection. Such advantages are accomplished using a reduction of design complexity over conventional configurations in the use of a single sleeve spring in the locking mechanism, and the use of smaller restriction slots to house axially offset locking balls in a manner that axially constrains movement of the locking balls. When a male component is inserted into the female component during a connection operation, a shoulder on the male component sequentially contacts the axially offset rows of locking balls, which drive the inner sleeve axially in an inward direction. In the fully connected state, the inner sleeve is biased axially outward so as to push back against the inward locking balls, thereby preventing further movement of the inward locking balls.