Patent ID: 7534066

Claim:
Interlocking coupling system ( 1 ) for overhead aligned rails ( 4 , 5 ) of which at least one rail ( 4 ) is displaceably arranged, said coupling system comprising a first coupling part ( 2 ) and a second coupling part ( 3 ), each of said coupling parts ( 2 , 3 ) for arranging at an end part of a respective rail ( 4 , 5 ) and arranged for interlocking when arranged on said rails ( 4 , 5 ) in an aligned position, wherein each of said coupling parts ( 2 , 3 ) comprises a pivotal gate member ( 23 , 33 ), and said first coupling part ( 23 ) comprises an axially protruding locking bolt member ( 21 ) with a tapered end part ( 214 ) comprising an axially forwardly open recess adapted to receive a pin ( 334 ) projecting from said gate member ( 33 ) of said second coupling part ( 3 ) when in said aligned position and an opposite end of said locking bolt member ( 21 ) is adapted to retractably engage with a recess ( 234 ) in said pivotal gate member ( 23 ) of said first coupling part, and when said coupling system is activated into a locked position both said gate members ( 23 , 33 ) are activated to axially retract said locking bolt member ( 21 ) within said first coupling part gate member and lockably retain said pin within said recess in said locking bolt member, wherein each of said coupling, parts ( 2 , 3 ), furthermore, comprises a pivotally mounted spring loaded key plate member ( 22 , 31 ) with at least one ball bearing ( 224 , 225 , 313 ) adapted to engage with said key plate member ( 22 , 31 ) on the opposite coupling part ( 2 , 3 ) by pressing against the ball bearing on said opposite key palate member when the coupling parts are in said aligned position, thereby activating said key plate members from a spring loaded position, pivoting each key plate member into a locked position such that said first coupling part plate member pivots to axially retract the locking bolt member, locking said pin in said recess in said locking bolt member and locking the coupling parts together.