Patent ID: 11858126
Assignee: ABB SCHWEIZ AG
Field: Handling (Mechanical engineering)
Classification: CPC B  F | IPC B

Claim 0:
1. A system comprising:
a robot having at least one robot joint, wherein the robot joint includes a first part and a second part arranged to have a relative movement in between, and a joint gap spacing the first part and the second part from each other, wherein the robot joint includes an inflatable seal accommodated in the joint gap to provide a fluid-tight sealing of the joint,
a control unit,
a valve arrangement, and
a tube arrangement fluidly connected to a source of pressurized fluid and to the inflatable seal, wherein the control unit is programmed to pressurize the inflatable seal by means of the valve arrangement and the tube arrangement such that the inflatable seal expands in an axial direction towards the second part to seal the joint gap between the first part and the second part,
and
wherein the control unit is configure to control the valve arrangement to pressurize the inflatable seal in synchronization with the robot operation, such that the inflatable seal is pressurized to a predetermined low pressure when the robot is working, and to a predetermined high pressure when the robot is exposed to high pressure wash down and/or is shut down, wherein the predetermined high pressure is higher than the predetermined low pressure.