US 12,241,993 B2
Piston and cylinder unit including a piston position detection unit and a collimator
Karl-Wilhelm Herwig, Witzenhausen (DE); Alexander Pik, Eschwege (DE); and Günter Leicht, Stegaurach (DE)
Assigned to Pacoma GmbH, Eschwege (DE)
Filed by Precision Nanosensors Inc., Millbrae, CA (US)
Filed on Aug. 13, 2021, as Appl. No. 17/401,621.
Claims priority of application No. 20191865 (EP), filed on Aug. 20, 2020.
Prior Publication US 2022/0057477 A1, Feb. 24, 2022
Int. Cl. G01S 7/03 (2006.01); G01S 13/32 (2006.01); H01Q 9/04 (2006.01); H01Q 19/06 (2006.01)
CPC G01S 7/03 (2013.01) [H01Q 19/062 (2013.01); G01S 13/32 (2013.01); H01Q 9/0407 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A piston and cylinder unit, comprising:
a cylinder, the cylinder including an interior extending axially in the cylinder and a mounting bore extending radially in the cylinder;
a piston, the piston being supported in the interior of the cylinder to be axially movable along a longitudinal center axis;
a piston position detection unit, the piston position detection unit being arranged in the mounting bore and being designed and arranged to detect the axial position of the piston in the cylinder by high frequency technology, the piston position detection unit including an antenna for sending and receiving high frequency signals along a beam path, the antenna having a main sense of direction of radiation extending parallel to the longitudinal center axis of the piston, wherein the antenna is arranged in a housing having a longitudinal housing axis, and wherein the longitudinal housing axis is perpendicular to the longitudinal center axis of the piston; and
a collimator, the collimator being arranged in the beam path of the antenna.