Patent ID: 6920669

Claim:
A catch for first and second objects moveable in relation to one another, comprising: a cylinder for connection to the first object; a fiction surface carrier for connection to the second object, said friction surface carrier being moveably connected to said cylinder such that said friction surface carrier is movable relative to said cylinder; a friction element arranged between said cylinder and said friction surface carrier, said friction element being actuatable in response to an electrical voltage signal applied thereto for creating a frictional grip between said cylinder and said friction surface carrier to prevent relative movement between said cylinder and said friction surface carrier, said friction element changing in volume as a function of the electrical voltage signal applied thereto; and a sensor assembly for registering a relative movement of said cylinder and said friction surface carrier, wherein said sensor assembly comprises a mechanism having an input part and an output part, one of said input and output parts is connected to said friction surface carrier and the other of said input and output parts is connected to said cylinder.