RING CAM AND FLUID-WORKING MACHINE INCLUDING RING CAM
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United States of America Patent
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Issued Date -
Oct 18, 2012
app pub date -
Jul 19, 2011
filing date -
Aug 17, 2010
priority date (Note) -
Abandoned
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Abstract
A ring cam for a fluid-working machine is formed from a plurality of segments. The segments have piston facing surfaces together defining a working surface of the fluid-working machine. The segments comprise a leading cooperating formation which has a piston facing surface which forms part of the working surface, at a trailing end, and which is recessed from the working surface at a leading end, and a trailing cooperating formation which has a piston facing surface which forms part of the working surface at a leading end, and which is recessed from the working surface at a trailing end. The cooperating formations interlock and rollers are thereby handed over smoothly from one segment to the next irrespective of slight variations in alignment due to manufacturing tolerance or wear.
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