US 12,297,904 B2
Stand-alone, self-purging, hollow-piston hydraulic actuator
Davide Carpi, Caluso (IT); Pier Paolo Rinaldi, Trentino (IT); and Giacomo Faggiani, Rovereto (IT)
Assigned to DANA ITALIA S.R.L., Arco (IT)
Filed by DANA ITALIA S.R.L., Trentino (IT)
Filed on Feb. 22, 2023, as Appl. No. 18/172,942.
Prior Publication US 2024/0280172 A1, Aug. 22, 2024
Int. Cl. F16H 61/30 (2006.01); F16H 63/30 (2006.01)
CPC F16H 61/30 (2013.01) [F16H 63/3023 (2013.01); F16H 2061/308 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A stand-alone block, comprising:
a hydraulic cylinder and one or more valves, wherein one or more adduction lines between the one or more valves and the hydraulic cylinder are configured to allow the hydraulic cylinder to be self-purging, wherein the hydraulic cylinder drives and guides a hollow piston, wherein a pass-through hole of the hollow piston is configured to host a rod axially aligned with respect to a centerline of the hollow piston, wherein the hollow piston has a radial clearance formed between an inner surface of the hollow piston and the rod, wherein the hollow piston has a surface a distance from a hole that forms the hydraulic cylinder, wherein the surface is not enclosed by the stand-alone block, and wherein a circular clip is positioned about the rod and abuts the surface such that the rod is fastened to the hollow piston.