Uniaxial eccentric screw pump having a flexible plastic shaft

Details Uniaxial eccentric screw pump having a flexible plastic shaft Uniaxial eccentric screw pump having a flexible plastic shaft

1996-09-10

1998-06-23

Vrablik, John J.

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

418182, F04C 2107, F04C 500

Patent

active

057696187

ABSTRACT:
This disclosure relates to a uniaxial eccentric screw pump. A boss 10a is integrally formed on one end (on the side of a pump casing 8) of the rotor 10, the screw pump 100, and one end of a flexible shaft 9 is inserted in the boss 10a and bonded together with the rotor 10 integrally by means of an adhesive. The flexible shaft 9 is made at least in part from a rod-like member which is extruded from PEEK (polyetheretherketone) which is one of the engineering plastics, into a cylinder. A metal rod 17 is provided in the middle of the flexible shaft in the longitudinal direction, or a metal sleeve is mounted over the outer circumference of the flexible shaft.

REFERENCES:
patent: 2621605 (1952-12-01), Mark, Jr.
patent: 4153397 (1979-05-01), Allen
patent: 5108273 (1992-04-01), Romanyszyn, Jr.

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