Distributing valve on a hydraulic rotary piston engine

Details Distributing valve on a hydraulic rotary piston engine Distributing valve on a hydraulic rotary piston engine

1977-02-25

1978-08-15

Croyle, Carlton R.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

13762524, F04C 1502

Patent

active

041068831

ABSTRACT:
The invention relates to an expansible chamber rotary piston engine of the type having meshing internal and external gears wherein one rotatable gear, which may be an internal gear or an external gear, has rotatable and oribtal movement relative to the other gear which is fixed relative to the housing. The engine has relatively rotatable and cooperable valve members connected respectively to the gears. The cooperable surfaces between the valve members may be either flat or cylindrically shaped. The valve members have respective first and second sets of circumferentially arranged ports with each port in one set moving sequentially into alignment with each port in the other set during relative rotation of the valve members. The ports are generally rectangularly shaped to provide maximum flow capacity between the valve members. In order to prevent the initial port overlap rate from being too high when two ports move into alignment, the edges of one set of ports is orientated at a small angle relative to the edges of the other set of ports. In this way the initial part of the overlapping is at a relatively slower rate and the impact effect of full pressure in the expanding chambers of the engine is minimized.

REFERENCES:
patent: 3473437 (1969-10-01), Ohrberg
patent: 3516437 (1970-06-01), Folkerts

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