In this discussion we will be paying homage to Pascal and exploring some every day applications of hydraulics (or pneumatics).

• Fluids (liquids and gasses) are both used to lift or move loads, or to transfer energy or gasses from one area to another. Liquids cannot be compressed; the transmission of force through a liquid can be incredibly powerful. Gasses can be compressed, when gasses are compressed the pressure of gas within the container increases. Due to entropy all particles will travel from areas of high pressure to low pressure, this allows gasses and energy to be transferred.
• Hydraulic and pneumatic systems are often associated with heavy machinery, but there are numerous applications of both types of systems all around us.
• Use a Small bit of research and find an unexpected item that uses hydraulics or pneumatics.
  • should include:
    • A brief description of the object, and a brief description of the hydraulic/pneumatic system within the object.
    • You must also include a link to the source of your information.
    • You can include an image if you like.
• Your example cannot be any hydraulic/pneumatic systems that are found in cars/trucks/large pieces of construction equipment. Your object cannot be an office chair or barber chair, or a dishwasher.
• Here is an example hydraulics and pneumatics in chairs!

Every wonder how adjustable office chairs or adjustable barber chairs work? Maybe only when one did not work when you wanted it to. Older barber chairs have hydraulic systems, but most barber chairs and office chairs now have pneumatic systems. These types of chairs typically have a hollow cylindrical-shaped base that is underneath a flat seat area. There is a cylinder inside the base of these chairs that holds gas, often nitrogen. These are often called "gas springs" or "pneumatic springs". There is a lever connected to the cylinder, when the lever is pressed gas is either pushed into, or out of the cylinder. This allows the seat of the chair to slide up and down. If your chair stops moving when you press the level, you probably need to replace the gas cylinder.Below is an image that depicts the gas cylinder in the base of the chair.

FILL/RELEASE PIN HEAVY DUTY ALLOWS GAS TO FLOW BETWEEN CHAMBERS GAS LIFT CYLINDER OPEN / CLOSE VALVE TRIGGERED BY THE FILL/RELEASE DIN STAINLESS STEEL PISTON ROD STRONG, SILENT & SMOOTH HEAVY DUTY HYDRAULIC CYLINDER SMOOTH SWIVEL BALL BEARINGS RUBBER BUSHINGS FOR PROTECTION & COMFORT HEAVY DUTY STEEL CYLINDER COLUMN HIGH QUALITY PREMIUM DESIGN