HYDRAULIC MOTOR Russian patent published in 1997 - IPC

FIELD: oil and gas industry. SUBSTANCE: hydraulic motor has housing provided with passageways for supplying and discharging fluid, cross- piece and cylindrical hollow in the housing in front of the cross-piece, valve hydraulic apparatus received in the hollow, and loaded hollow plunger. The rod of the valving hydraulic apparatus has axial through passageway and spring-loaded valving member for interaction with the hollow plunger that form a chamber together with the rod. The chamber is in communication with the through passageway in the rod. The rod is provided with two projections and springs axially mounted between the cross-piece and each of the projections . The cylindrical hollow is provided with a shaped bore that define a braking chamber together with the top projection. In addition, the cylindrical hollow receives a double-sided piston loaded from both sides with springs received in the hollow and provided with a tubular rod axially alined with the valuing member and interacting with the latter. The piston space is in communication with the space of the housing from the side of the rod of the valving hydraulic apparatus. The opposite piston space is in communication with the space of the rod. EFFECT: enhanced efficiency. 2 dwg