US 12,264,659 B2
Piston assembly
Luca Fontanesi, Reggio Emilia (IT); Alessandro Sassi, Reggio Emilia (IT); and David Gambuzzi, Reggio Emilia (IT)
Assigned to DANA MOTION SYSTEMS ITALIA S.R.L., Reggio Emilia (IT)
Filed by Dana Motion Systems Italia S.R.L., Reggio Emilia (IT)
Filed on Nov. 2, 2023, as Appl. No. 18/500,912.
Claims priority of application No. 20 2022 106 185.8 (DE), filed on Nov. 3, 2022.
Prior Publication US 2024/0151216 A1, May 9, 2024
Int. Cl. F04B 1/295 (2020.01); F04B 1/124 (2020.01); F04B 1/143 (2020.01); F04B 53/16 (2006.01)
CPC F04B 1/143 (2013.01) [F04B 1/124 (2013.01); F04B 1/295 (2013.01); F04B 53/162 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A piston assembly, comprising:
a cylinder extending along an axis and having an open axial end,
a cap assembly closing the cylinder at its open axial end, the cap assembly comprising an insertion portion received in the cylinder at its open axial end, and
a piston axially movably disposed within the cylinder and partially received in the insertion portion of the cap assembly;
a first biasing member for biasing the piston in a first direction along the axis, and
an axially displaceable zeroing member limiting axial movement of the first biasing member; and
a worm screw or leadscrew engaged with the zeroing member so that the zeroing member is displaceable along the axis by rotating the worm screw.
 
16. A piston assembly, comprising:
a cylinder extending along an axis and having an open axial end,
a cap assembly closing the cylinder at its open axial end, the cap assembly comprising an insertion portion received in the cylinder at its open axial end, and
a piston axially movably disposed within the cylinder and partially received in the insertion portion of the cap assembly;
a first biasing member for biasing the piston in a first direction along the axis, and an axially displaceable zeroing member limiting axial movement of the first biasing member; and
a rotatable gudgeon including an eccentric pin engaged with the zeroing member so that the zeroing member is displaceable along the axis by rotating the rotatable gudgeon.