RING CAM AND FLUID-WORKING MACHINE INCLUDING RING CAM
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United States of America Patent
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N/A
Issued Date -
Oct 18, 2012
app pub date -
Jul 19, 2011
filing date -
Aug 17, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A fluid-working machine comprising a ring cam, at least one piston defining a working chamber, and at least one valve associated with the or each working chamber for connecting the working chamber alternately to low and high pressure manifolds in phased relationship to cycles of working chamber volume. The ring cam has a wave-like cam working surface for operative engagement with the at least one piston. The waves of the wave-like cam surface each having a leading face and a trailing face and discontinuities, such as apertures to retain bolts, are located in the working surface on whichever of the leading face and the trailing face the at least one piston does least work during normal operation resulting from the flow of fluid into and out of the working chamber in phased relationship to cycles of working chamber volume.
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