Fluid apparatus of an internal gear type having defined tooth pr

Details Fluid apparatus of an internal gear type having defined tooth pr Fluid apparatus of an internal gear type having defined tooth pr

1996-03-07

1997-02-25

Vrablik, John J.

Rotary expansible chamber devices

Working chamber surface expressed mathematically

418170, F01C 110, F03C 208, F04C 210

Patent

active

056054513

ABSTRACT:
A fluid apparatus of an internal gear type comprising an internal gear 3 rotatively mounted in a housing 1, an external gear 5 meshing with said internal gear 3, and a crescent partition piece disposed between the both gears, each tooth profile of said both gears 3 and 5 being defined by a line equidistant from an inner cycloid described by a rolling circle, the diameter of which is equal to a radius of the intermeshing pitch circle of the internal gear, whereby the load applied to the tooth surfaces between the meshing internal gear and external gear and thus the tooth-contact stress can be reduced, and wear of tooth surfaces and generating noise can also be minimized.

REFERENCES:
patent: 3491698 (1970-01-01), Truninger
patent: 3907470 (1975-09-01), Harle et al.
patent: 4155686 (1979-05-01), Eisenmann et al.
patent: 4386892 (1983-06-01), Stich et al.
patent: 5163826 (1992-11-01), Cozens
patent: 5413470 (1995-05-01), Eisenmann

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