US 12,006,646 B2
Fender
Gerrit Van Der Burg, Rotterdam (NL)
Assigned to SHIPYARD ROTTERDAM B.V., Rotterdam (NL)
Appl. No. 16/978,316
Filed by Shipyard Rotterdam B.V., Rotterdam (NL)
PCT Filed Mar. 6, 2019, PCT No. PCT/NL2019/050139
§ 371(c)(1), (2) Date Sep. 4, 2020,
PCT Pub. No. WO2019/172754, PCT Pub. Date Sep. 12, 2019.
Claims priority of application No. 2020540 (NL), filed on Mar. 6, 2018.
Prior Publication US 2021/0002840 A1, Jan. 7, 2021
Int. Cl. E02B 3/26 (2006.01); B63B 21/02 (2006.01); F16F 9/06 (2006.01); F16F 15/023 (2006.01); F16F 15/027 (2006.01); H01F 7/20 (2006.01); H02K 7/18 (2006.01); H02K 11/00 (2016.01)
CPC E02B 3/26 (2013.01) [B63B 21/02 (2013.01); F16F 9/065 (2013.01); F16F 15/023 (2013.01); F16F 15/0275 (2013.01); H01F 7/20 (2013.01); H02K 7/1853 (2013.01); H02K 11/0094 (2013.01); F16F 2222/12 (2013.01); F16F 2228/066 (2013.01); F16F 2230/18 (2013.01); F16F 2232/08 (2013.01); F16F 2236/04 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fender for fending a ship from a mooring wall, the fender comprising
a fender base structure;
a movable fender surface mounted moveable in a fender compression direction relative to the fender base structure;
a hydraulic cylinder and piston assembly operationally connected between the fender base structure and the movable fender surface;
a reservoir filled at least partially with gas;
an overpressure valve configured to pass hydraulic liquid from the hydraulic cylinder to the reservoir when a difference between a pressure of the hydraulic liquid in the hydraulic cylinder and a pressure in the reservoir reaches a first threshold;
a return valve configured to pass hydraulic liquid from the reservoir to the hydraulic cylinder when a difference between a pressure of the hydraulic liquid in the hydraulic cylinder drops below a second threshold lower than the first threshold;
at least one force adjustment device coupled between the fender base structure and the movable fender surface; and
a logic circuit or a microcomputer coupled to the at least one force adjustment device and configured for dynamically varying a force exerted by the at least one force adjustment device during oscillation periods of oscillatory movement of the ship, wherein the at least one force adjustment device is used to increase and reduce a reaction force exerted by the fender respectively during a period of oscillatory movement of the ship to increase the net absorption of energy from the oscillatory movement.