Reversible gear pump with invariant flow direction

Details Reversible gear pump with invariant flow direction Reversible gear pump with invariant flow direction

1978-09-19

1980-04-29

Vrablik, John J.

Rotary expansible chamber devices

Self-acting unidirectional flow with reverse rotation or...

418166, F04C 106, F04C 1502

Patent

active

042004276

ABSTRACT:
A gear pump for unidirectionally transporting a fluid such as oil has a stationary housing with an inlet port and an outlet port on opposite sides of the axis of a cylindrical chamber in which a ring with an eccentric inner periphery is rotatable through an arc of 180.degree. between two limiting positions. Freely rotatable within the inner ring periphery is an annular outer rotor with internal gear teeth entrainable by a driven inner rotor with external gear teeth, the latter numbering one less than the internal gear teeth of the outer rotor. A face of the ring has one or more shallow depressions open toward the outer rotor, each depression being spanned by a leaf spring which is anchored to the ring and defines with the outer periphery of that rotor a wedge-shaped gap diverging symmetrically toward its ends to form alternate lodgments for a rotary coupling member such as a ball or a roller. With the ring in one of its limiting positions and the rotors being driven in a direction in which the pumping spaces formed between the coacting rotor teeth move the fluid from the inlet port to the outlet port, the coupling member lies free or under light spring pressure in the downstream lodgment as seen in the direction of rotation. When the rotor drive is reversed, leakage fluid present at the contact surface between the outer rotor and the ring builds up sufficient pressure to drive the coupling member toward the narrow waist of its gap to entrain the ring into its other limiting position in which it is arrested as the coupling member moves past that waist into its opposite lodgment.

REFERENCES:
patent: 3039677 (1962-06-01), Nissley
patent: 3118387 (1964-01-01), Aldrich
patent: 3303783 (1967-02-01), Neubauer

Affiliated with

Also associated with

Rating

Reversible gear pump with invariant flow direction does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reversible gear pump with invariant flow direction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reversible gear pump with invariant flow direction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1682632