Patent ID: 6102681
Filing Date: 2000-08-15
Classification: F04C

Abstract:
A helicoidal fluid handling device suitable for use as a positive displacement pump or motor, comprising:a) an elongate rotor, said rotor having at least one lobe projecting radially outward and extending helically along the length of said rotor; andb) a substantially cylindrical stator comprising an elastomeric form having an inner surface, first portions of said elastomeric form forming a number of grooves in said inner surface extending helically along the length of said stator, said number of grooves being one more than the number of lobes in said rotor, second portions of said elastomeric form forming a projection on said inner surface between each of said grooves, said projections extending helically along the length of said stator, said stator enclosing said rotor such that relative rotation between said rotor and said stator causes said portions forming said projections to undergo cyclic deformation, said cyclic deformation generating heat within said projections thereby creating a temperature gradient within said elastomeric form; said elastomeric form comprising means for reducing said temperature gradient by distributing said heat from said portions of said elastomeric form forming said projections to said portions forming said grooves, said means for reducing said temperature gradient comprising a network of thermally conductive fibers encapsulated in an elastomeric material, said network of thermally conductive fibers comprising at least a first group of fibers extending from said portions forming said projections to said portions forming said grooves so as to transfer heat from said portions forming said projections to said portions forming said grooves.