Patent ID: 8597242

Claim:
Apparatus ( 1 ) for establishing the penetration depth of a tubular or rod-shaped sliding part ( 2 ), particularly of a medical aspiration needle carrier part, in an accommodation part ( 3 ), by means of an adjustment element ( 4 ) that surrounds the sliding part ( 2 ), which element is adjustable in the longitudinal direction of the sliding part ( 2 ), and can be locked in the accommodation part ( 3 ), in its position, in each instance, by means of a clamping device ( 5 ), establishing the penetration depth of the sliding part ( 2 ), wherein the clamping device ( 5 ) is formed in that at least one rocker element ( 6 ; 7 ) is disposed between the adjustment element ( 4 ) and the sliding part ( 2 ), which element can be moved, by means of rotating the adjustment element ( 4 ) crosswise to the longitudinal direction of the sliding part ( 2 ), between a first rotational position that permits displaceability of the adjustment element ( 4 ) in the longitudinal direction of the sliding part ( 2 ), and a second rotational position that inhibits such displaceability, which is different from the first rotational position.