Patent Number: 8,869,521

Title: Fluid working machine with cylinders coupled to split exterior ports by electrohydraulic valves

Abstract: An apparatus includes a first plurality of cylinders, each coupled to a shared first port by a separate first valve and to a shared second port by a separate second valve. Each first and second valve has a chamber to which pressure from either the associated cylinder or the respective port is dynamically applied to select different operating modes. Each one of a second plurality of cylinders is coupled to the first port by a separate third valve and to a shared third port by a separate fourth valve. Each third and fourth valve has a chamber to which pressure from either the associated cylinder or the respective port is dynamically applied to select different operating modes. Selecting an operating mode enables the apparatus to act as a bidirectional pump or a hydraulic motor. Selectively controller the valves can deactivate an individual cylinder, while other cylinders remain active.

Inventors: Stephenson; Dwight B. (Oconomowoc, WI), Rajput; Prashant K. (Maharashtra, IN)

Assignee: Husco International, Inc.

International Classification: F16D 31/02 (20060101)

Expiration Date: 2018-10-28 0:00:00