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Phil WOOD & Co.
4/6/2006                                            Click on images to see larger version..


Phil WOOD "CHP" Pedals

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Vince Connelly provided additional photos...S

          
 


The Phil disc brake.

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A Phil brake as used on the front of a custom McLean (USA) racing tricycle

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    "The brake operates a lot like an automobile clutch. A splined driver threads on to the hub. That in turn drives a splined friction disc. The body on the brake is a backing plate and a pressure plate. The cable actuating arms rotate cams that in turn cause four radially spaced lever arms to move the pressure plate against friction disc and backing plate.
       The disc floats on the splined driver. There are 4 adjusting screws that move the pressure plate closer to the disc to allow for friction disc wear. The brake assembly slides over the hub axle and is held in place by a rubber "O" ring that seats in the groove in the hub axle. A reaction arm contacts the frame and serves to function the same as the reaction arm on a coaster brake. The brake is somewhat tricky to adjust but once mastered it functions well. The friction disc was made from an asbestos material. Since the use of asbestos is no longer available the discs are no longer available. A suitable replacement materials had been found, and along with the high cost to manufacture it has since been discontinued."

Rodney Moseman

 

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