Roots-type fluid machine

Details Roots-type fluid machine Roots-type fluid machine

1986-08-01

1988-01-05

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Seal element between working member and cylinder

418152, 418178, 418206, F04C 1818, F04C 2700

Patent

active

047173220

ABSTRACT:
A Roots-type rotary fluid machine having resin-coated rotors fluid-tightly accomodated in a chamber formed in a housing structure which consists of a generally cup-shaped main housing body having a bore closed at its one end and open the other end, and a covering member which closes the open end of the bore in the housing body. The housing body includes a fillet portion which bridges an inner flat surface defining the bottom of the bore and facing one end face of each rotor, and an inner peripheral surface defining the periphery of the bore and facing the outer peripheral surface of each rotor. The fillet portion is formed along a line of intersection of extensions of the inner flat surface and the inner peripheral surface of the housing body, and inwardly into the bore from this line of intersection. The fillet portion has a generally triangular shape in cross section taken in a direction perpendicular to the above line of intersection.

REFERENCES:
patent: 2491678 (1949-12-01), McCulloch et al.
patent: 2833224 (1958-05-01), Meyer et al.
patent: 2857763 (1958-10-01), Hague et al.
patent: 2944732 (1960-07-01), Lorenz
patent: 4225295 (1980-09-01), Shimizu et al.
patent: 4466785 (1984-08-01), Biswas
Sae Technical Paper Series; "Developments of Volkswagon's Supercharger G-Lader"; B. Wiedemann, et al.; International Congress and Exposition, Detroit, Michigan, Feb. 24-28, 1986.

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