Patent ID: 9102414
Filing Date: 2015-08-11
Classification: B64D,F15B,F16H,Y10T

Abstract:
1. A hydraulic motor assembly for an aerial refueling system, comprising: a supply conduit for conveying hydraulic fluid from an aircraft hydraulic system, a return conduit for conveying hydraulic fluid to the aircraft hydraulic system, and a pump conduit for conveying hydraulic fluid between the supply conduit and the return conduit; a valve comprising an inlet coupled to the supply conduit, and an outlet coupled to the pump conduit; a variable displacement motor-pump comprising a first port coupled to the return conduit, a second port coupled to the pump conduit, and a spline shaft coupled to a hose reel of an aerial refueling system, wherein the variable displacement motor-pump operates in a pump mode to convey hydraulic fluid from the first port to the second port when the hose reel rotates in a trail direction, and wherein the variable displacement motor-pump operates in a motor mode to convey hydraulic fluid from the second port to the first port when the hose reel rotates in a retract direction; and a pump-motor relief valve comprising: