Patent ID: 11892093
Assignee: BAKER HUGHES OILFIELD OPERATIONS LLC
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC E  F

Claim 18:
19. A device for generating pressure pulses, the device comprising:
a valve member disposed in a fluid passageway, the fluid passageway including a restriction, the valve member movable by an actuator relative to the restriction to generate a pressure pulse in a fluid in the fluid passageway based on varying a relative position between the valve member and the restriction and creating a differential pressure across the fluid passageway, the differential pressure applying a first force on the valve member; and
a piston member in hydraulic communication with the differential pressure, the differential pressure applying a second force on the piston member and moving the piston member in a piston member stroke direction, the piston member having a locomotive connection to the valve member, wherein the locomotive connection is configured to transmit the first force to the piston member and apply the first force to the piston member in a direction opposite a direction of the second force and move the valve member in a valve member stroke direction opposite the piston member stroke direction.