Hydraulic rotary piston engine having inproved commutator valve

Details Hydraulic rotary piston engine having inproved commutator valve Hydraulic rotary piston engine having inproved commutator valve

1988-03-24

1990-06-19

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

13762523, F03C 208

Patent

active

049349112

ABSTRACT:
A rotary piston engine having a commutator valve in a cooperating connection with the output shaft so as to supply and remove pressure medium to and from tooth chambers. Said engine further comprises passages which end adjacent to the commutator valve in ellipse shaped control openings. The commutator valve is integrally formed with the output shaft and all control channels are in the outer circumference of the commutator valve in the form of grooves which are parallel to the axis. Lands are provided between said grooves. The width of the lands defining said grooves is selected such that the width of the lands changes alternately, one land having a width approximately corresponding to the smaller width of the control ellipse, while the alternate land has a width which is increased by an oversize over the width of the smaller width of said control ellipse.

REFERENCES:
patent: 3087436 (1963-04-01), Dettlof et al.
patent: 3473437 (1969-10-01), Ohrberg
patent: 3819307 (1974-06-01), Uppal
patent: 4106883 (1978-08-01), Hansen et al.
patent: 4362479 (1982-12-01), Pahl
patent: 4451217 (1984-05-01), White
patent: 4671747 (1987-06-01), Arbterg

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