Pneumatic motor success with pneumatic motors in the locomotive industry. In 1911 he designed a pneumatic locomotive and sold the patent to the H.K. Porter Company in Pittsburgh for use in coal mines. Because pneumatic motors do not use combustion they were a much safer option in the coal industry. Many companies claim to be developing Compressed air cars, but none are actually available for purchase or even independent testing. Impact wrenches, pulse tools, nutrunners, screwdrivers, drills, grinders, die grinders, sanders, dental drills and other pneumatic tools use a variety of air motors. These include vane type motors, turbines and piston motors.
Dunlop Pneumatic Tyre Co Ltd v New Garage & Motor Co Ltd damages and not as a penalty’. The judge held the £5 sum was liquidated damages and enforceable. The Court of Appeal held the clause was a penalty and Dunlop could only get nominal damages. Dunlop appealed. The House of Lords held the clause was not a penalty, and merely a genuine preestimate of Dunlop’s potential loss, and so Dunlop could enforce the agreement. Lord Dunedin set out the following principles. Dunlop Pneumatic Tyre Co Ltd v New Garage & Motor Co Ltd It should not be confused with "Dunlop Pneumatic Tyre Co Ltd v Selfridge & Co Ltd", which held