Patent ID: 8841786
Filing Date: 2014-09-23
Classification: B60G,F01C,F03C,F03G

Abstract:
1. A device comprising: a fluid filled housing; a piston head having a first side and a second side and adapted to be disposed in the fluid filled housing thereby being immersed in the fluid, the piston head and the housing defining a compression volume between the first side of the piston and the housing and an extension volume between the second side of the piston and the housing; a hydraulic motor/pump integrated with the piston head or the housing, wherein the hydraulic motor/pump has a first port in fluid communication with fluid adjacent the first side of the piston head and a second port in fluid communication with fluid adjacent the second side of the piston head, wherein the hydraulic motor/pump is a positive displacement hydraulic motor/pump; an electric generator/motor operatively coupled to the hydraulic motor/pump; and a controller operatively coupled to the electric generator/motor, wherein the controller controls a force provided by the electric generator/motor in response to at least one input, wherein the controller controls the force by controlling fluid flow through the hydraulic motor by controlling an electrical characteristic of the electric generator/motor.