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US 5,759,019 AGranted
Progressive cavity pumps using composite materials
AssigneeSteven M. Wood
InventorsSteven M. Wood, Brian E. Spencer
Life of this patent
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Abstract
The stator, rotor and/or flex shaft of a progressive cavity pump is made up of composite materials, e.g., fiberglass and resin, in a variety of combinations with and without bonded resilient elastomers. The composites are formulated to provide resiliency and non-resiliency where needed. The flex shaft between the rotary power source and the rotor is made of composite materials and designed to absorb the orbital and gyrational movement of the rotor.
Claims17
A progressive cavity pump comprising:
- a stator, said stator formed of a unitary support section having an outer cylindrical surface and a bonded internal helical surface section, said support section comprised of a substantially non-resilient composite material body formed of a filament fiber impregnated with a thermal setting resin;
- and
- said helical surface section comprised of a bonded resilient elastomer material.
A progressive cavity pump comprising:
- a stator, said stator formed of a unitary support section having an outer cylindrical surface and a bonded internal helical surface section, said support section comprised of a substantially non-resilient composite material formed of a filament fiber from the group of carbon fibers, boron fibers, ceramic fibers, glass fibers, thermoplastic fibers, natural fiber, metallic fibers, and synthetic fibers which are impregnated with a thermal setting resin;
- said helical surface section comprised of a bonded resilient elastomer material;
- a helical rotor operational within said stator;
- and
- means to rotate said rotor.
2 more elements
Dependencies are inferred from the claim text.