US 11,814,874 B2
Locking device
Jochen Stegelmann, Scharbeutz (DE); Borgar Pfeiffer, Schwentinental (DE); and Lukas Nuppenau, Elmenhorst (DE)
Assigned to KENDRION KUHNKE AUTOMATION GMBH, Malente (DE)
Filed by Kendrion Kuhnke Automation GmbH, Malente (DE)
Filed on Jan. 19, 2022, as Appl. No. 17/578,742.
Claims priority of application No. 21 152 964 (EP), filed on Jan. 22, 2021.
Prior Publication US 2022/0235579 A1, Jul. 28, 2022
Int. Cl. E05B 47/00 (2006.01); D06F 39/14 (2006.01); E05B 47/02 (2006.01)
CPC E05B 47/0006 (2013.01) [D06F 39/14 (2013.01); E05B 47/026 (2013.01); E05B 2047/0016 (2013.01); E05B 2047/0035 (2013.01); E05B 2047/0073 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A locking device comprising:
a tappet having a first end drivable in a linear direction by an actuator between an extended position and a retracted position;
a locking pin engaged with a second end of the tappet to move the locking pin in the linear direction between an unlocked position and a locked position corresponding to the extended position and the retracted position, respectively; and
a clamping device indirectly coupling the tappet to the locking pin;
wherein the clamping device having an inner spring and an outer spring arranged coaxially relative to each other in the linear direction, and the inner spring is at least partially surrounded by the outer spring in a radial direction orthogonal to the linear direction;
a coupling body is formed in a sleeve shape arranged between the inner spring and the outer spring in the radial direction to indirectly couple movement between the second end of the tappet and locking pin via the inner spring and the outer spring; and
the outer spring is arranged between the coupling body a portion of the locking pin surrounding the second end of the tappet.