Screw spindle pump with a reduced pulsation effect

Details Screw spindle pump with a reduced pulsation effect Screw spindle pump with a reduced pulsation effect

1990-11-26

1992-06-23

Bertsch, Richard A.

Rotary expansible chamber devices

Interengaging rotating members

Three or more

4182013, F04C 216

Patent

active

051238217

ABSTRACT:
In a displacement pump having at least one screw spindle which is mounted in an opening in a housing surrounding same between a suction chamber and a pressure chamber, the profile termination of the spindle, at the pressure end, is turned off in a conical configuration at the outside diameter (d), and the angle of inclination (w) of the conical surface (43) is below 10.degree.. In addition the spindle is to be provided at its end on the suction side with a conical surface with an angle of inclination (w.sub.1) which is below 5.degree., preferably below 3.degree..

REFERENCES:
patent: 2652192 (1953-09-01), Chilton
patent: 2952216 (1960-09-01), Wildhaber
patent: 3103894 (1963-09-01), Sennet
patent: 3814557 (1974-06-01), Volz
patent: 4018549 (1977-04-01), Segerstrom
patent: 4522576 (1985-06-01), Carre et al.

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