US 9,957,961 B2Granted

Concentric rotary fluid machine

AssigneeGreystone Technologies Pty Ltd

InventorsNicholas Ryan Marchand, Jeffery Ronald Clausen

Life of this patent

Estimating the term…

Loading patent…

Abstract

A concentric rotary fluid machine includes a first body and a second body that are rotatable relative to each other and coaxially arranged one inside the other. A plurality of gates are supported by the second body in gate pockets. Each gate pocket includes: a gate retention recess that receives a gate cylinder of a gate; a gate seal recess that receives a sealing portion of a gate; and an intervening land. The sealing portion is configured to reciprocate up and down within a corresponding gate seal recess while maintaining contact with the recess and the second body. A plurality of lobes on the first body cause the gates to swing about respective swing axes as the first body rotates relative to the second body. The lobes and the lands are configured so that a lobe forms a substantial seal against a land when in mutual radial alignment.

Claims21

Dependent claims

A concentric rotary fluid machine comprising:

first and second bodies, the bodies being coaxially arranged one inside the other to define a working chamber there between and wherein the bodies are rotatable one relative to the other about a rotation axis;
at least one gate supported by one of the first body and the second body wherein the body supporting the gate constitutes a supporting body and the body not supporting the gate constitutes a non-supporting body;
at least one lobe provide on the non-supporting body;
and
for each gate, a respective gate pocket formed on the supporting body;
each gate being supported in a manner to swing about a respective swing axis that lies parallel with the rotation axis, each gate having a sealing portion distant its corresponding swing axis, each gate pocket being configured to receive the sealing portion of a corresponding gate;
the gate pockets, sealing portions and non-supporting body being relatively configured such that when the at least one gate is in an extended position the sealing portion of the at least one gate forms a substantial seal against both the gate pocket and the non-supporting body wherein for each gate, the sealing portion is configured to always at least partially reside within a respective gate pocket during rotation of the bodies relative to each other;
wherein the gate pocket comprises a gate retention recess through which the swing axis passes and a gate seal recess within which the gate seal always at least partially resides during rotation of the bodies relative to each other;
wherein the supporting body comprises, for each gate pocket, a land located between the gate retention recess and gate seal recess.

6 more elements

A concentric rotary fluid machine comprising:

first and second bodies, the bodies being coaxially arranged one inside the other to define a working fluid space there between and wherein the bodies are rotatable one relative to the other about a rotation axis;
at least one gate supported by one of the first body and the second body wherein the body supporting the gate constitutes a supporting body and the body not supporting the gate constitutes a non-supporting body;
at least one lobe provide on the non-supporting body;
each gate being supported in a manner to swing about a respective swing axis that lies parallel with the rotation axis, each gate having a sealing portion distant its corresponding swing axis, each gate and the bodies being relatively configured such that when the at least one gate is in an extended position the sealing portion forms a substantial seal against both the supporting and non-supporting body and wherein the gates and lobes are arranged such that on relative rotation of the bodies:
when the machine is operated as a motor, a leading ramp of the lobes contacts the sealing portion of the at least one gate prior to passing a corresponding swing axis of the at least one gate;
and when the machine is operated as a pump, a leading ramp of the lobes passes the swing axis of the at least one gate prior to contacting a corresponding portion of the at least one gate.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/911,771Filed 12 Aug 2014 · us provisional application
Priority: 12 Aug 2013
Published: US 2016/0201668 A114 Jul 2016
Granted: 1 May 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

F04C 15/0007
Sealing arrangements in rotary-piston machines or pumps: radial sealings for working fluid
F01C 1/322
Having both the movement defined in group F01C1/02 and relative reciprocation between the co-operating members: with vanes hinged to the outer…
F01C 1/40
Having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of…:…
F01C 19/02
Sealing arrangements in rotary-piston machines or engines: radially-movable sealings for working fluids