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Airport shopping trolleys.

  1. Jun 17, 2006 #1
    Hi there.

    What is the braking mechanism called used in trolleys/ especially in airport trolleys where you pull the handle to stop the wheels? And how does it work?

    Cheers
     
  2. jcsd
  3. Jun 17, 2006 #2

    Danger

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    Gold Member

    I'm afraid that I've never seen one, so I don't know. It's unlikely, however, that they use anything exotic like calipers or brake drums. On 'walkers' for the elderly, or wheelchairs, it's generally just a rubber-coated steel bar that gets pulled against the tire.
     
  4. Jun 17, 2006 #3

    Astronuc

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    Staff: Mentor

    A brake mechanism works by friction. If they have brakes, it may be a leaver system, much like a hand brake in a car. The service carts on planes have a lever type brake system. One lever is pressed to lock the brake on, and another lever is pressed to release the brake.
     
  5. Jun 17, 2006 #4

    FredGarvin

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    Science Advisor

    I have not seen what you are referring to. However, I would think that it would be something similar to what you see in a bicycle.
     
  6. Jun 18, 2006 #5

    brewnog

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    Science Advisor
    Gold Member

    The ones I've seen are just a simple rod-operated brake which clamps the wheel from both sides by two circular rubber discs. You don't really need the progressive control you have with a car or a bike, they're pretty crude, clunky, and on/off.
     
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