Yes there is. Pneumatic valve springs. They are metal bellows that have air in them. Their use is in replacing metal wire springs in a high-speed combustion engine. An example would be formula one engines.
There are two types of pneumatic systems currently used in naval aircraft
When you need to inflate the tires.
To use a foot pump for a bicycle, first attach the pump nozzle to the valve on the tire. Step on the foot pedal to pump air into the tire. Keep pumping until the tire reaches the desired pressure level. Disconnect the pump nozzle from the valve and secure the valve cap back on. Your bicycle tire is now ready to ride.
Thre's really no way of answering that, as the capacity of bicycle pumps isn't defined. So, you'd have to look at the human powering the bicycle pump. And given that you can only use your arms powering the pump Id say 1 kW tops.
on buses for brakes and in engineerring
Hydrolic
Yes, but it will take you ages
Pneumatic = Air! There are brake systems that use a combination of both pneumatic and hydraulic components. In those combination braking systems you would use the hydraulic brake fluid that the manufacture specifies.
To create a Lego pneumatic suspension, you'll need pneumatic components such as pumps, cylinders, and tubing. Begin by connecting the pneumatic cylinders to a base and attaching them to the Lego chassis to serve as the suspension. Use a pump to control air pressure, allowing the cylinders to expand and contract, simulating a suspension system. Finally, fine-tune the setup by adjusting the air pressure for optimal performance.
To properly maintain and use an air pump for a bicycle, regularly check the pump for any damage or wear, ensure the pump is compatible with your bike's valve type, and follow the manufacturer's instructions for proper inflation pressure. Keep the pump clean and store it in a dry place when not in use.
Pneumatic, use of air. Hydraulic, use of oil or other fluid.