Undercut stator for a positive displacment motor
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United States of America Patent
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Jul 19, 2016
Grant Date -
Oct 6, 2011
app pub date -
Mar 30, 2010
filing date -
Mar 30, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A Moineau style stator includes a stator tube having a plurality of rigid helical lobes formed on an inner surface thereof. The helical lobes define a major internal tube diameter that is greater than a pass through diameter of the tube such that the major diameter undercuts the pass through diameter of the tube. A major liner diameter may also be less than the pass through diameter so as to provide a suitable interference fit between rotor and stator.
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International Classification(s)
- B23P:OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVE....
- B21K:MAKING FORGED OR PRESSED PRODUCTS, e.g. HORSE-SHOE....
- F04C:ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DIS....
- F03C:POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- B23H:WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRA....
- F01C:ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR EN....
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