Patent ID: 7263821

Claim:
A chain lock for link chains with two lock parts ( 1 , 2 ) which can be displaced by limited amounts with respect to each other in a longitudinal direction of the lock in order to open and close the lock, each lock part having opposed ends which are connected to each other via a longitudinal web ( 3 ), one of said opposed ends forming a stud ( 6 ) having a retaining web ( 8 ) extending over part of a circumference of the stud, and the other of said opposed ends being provided with a recess ( 7 ) for receiving the stud and having a retaining groove ( 10 ) for the retaining web ( 8 ), characterized in that the stud ( 6 ) and the recess ( 7 ) have a cross section which continuously widens or expands in the longitudinal direction of the lock.