Pulse-free blower

Details Pulse-free blower Pulse-free blower

1977-11-14

1980-08-05

Vrablik, John J.

Rotary expansible chamber devices

Methods

418 78, 418180, 418206, F04C 1704, F04C 2908

Patent

active

042159776

ABSTRACT:
A three-lobe Root's blower is provided with feed back structure to bring the gas trapped in the impeller well volumes up to the discharge pressure prior to delivery. An essentially uniform and pulse-free discharge is produced by having a constant feed back flow rate which is achieved by always having a trapped impeller well volume in communication with the outlet via feed back structure which is sized to yield a continuous feed back flow rate.

REFERENCES:
patent: 1252160 (1918-01-01), Pagel
patent: 2489887 (1949-11-01), Houghton
patent: 2665057 (1954-01-01), Walter
patent: 2871794 (1959-02-01), Mosbacher
patent: 3531227 (1970-09-01), Weatherston
patent: 3667874 (1972-06-01), Weatherston et al.

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