Helical gear pump and method of manufacturing the same

Details Helical gear pump and method of manufacturing the same Helical gear pump and method of manufacturing the same

1975-04-21

1977-06-21

Vrablik, John J.

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

418220, 291564R, 291568R, 29423, F01C 110, F01C 2108, F04C 106, B23P 1510

Patent

active

040308626

ABSTRACT:
A helical gear pump in which the rotor is made of a wire or bar wound into a cylindrical helix. The rotor is made by twisting two wires or bars around each other, separating the two helices so formed, and using one or both of them as a rotor. The stator is made of a tube of plastics which is formed by inserting into the tube a mandrel having threads correspondng to required internal threads of the stator, causing the plastics tube to soften and applying external pressure to it to make its inside assume a shape corresponding to that of the mandrel. The mandrel is made by winding helically two wires about a third straight wire and securing the first-mentioned two wires to the third wire, all the said wires having about the same diameter as the wire of which the rotor is made.

REFERENCES:
patent: 2463341 (1949-03-01), Wade
patent: 2553548 (1951-05-01), Canazzi et al.
patent: 2874643 (1959-02-01), Bourke
patent: 3603407 (1971-09-01), Clark

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