Martin G Clements

US Patent:

6398494, Jun 4, 2002

Filed:

May 10, 2000

Appl. No.:

09/567884

Inventors:

Martin A. Clements - North Royalton OH

Assignee:

Argo-Tech Corporation - Cleveland OH

International Classification:

F04D 2944

US Classification:

415203, 415206

Abstract:

An impeller for a centrifugal pump is provided. It has an inlet side and an outlet side. Additionally, the impeller has a base, a plurality of guide elements extending from the base fluid flow channels, and a centrally disposed inlet opening. The fluid flow channels defined by the guide elements impart energy to the fluid during rotation of the impeller. The second member serves as a shroud and encloses the fluid flow channels. The centrally disposed inlet opening through the shroud admits fluid into the flow channels of the impeller to then be conducted outwardly upon rotation of the impeller.

US Patent:

6402487, Jun 11, 2002

Filed:

Aug 14, 2000

Appl. No.:

09/638685

Inventors:

Martin A. Clements - Parma OH
E. Kent Miller - Kirtland OH

Assignee:

Argo-Tech Corporation - Cleveland OH

International Classification:

E03C 200

US Classification:

418 26, 418 24, 418 25, 418 27, 418 31

Abstract:

The present invention relates to a system that provides independently operated or controlled circuits in a single device. An exemplary application adapts a variable displacement roller pump into an engine geometry control system that uses one circuit of the pump during start-up and then removes the circuit from the system and satisfies other pumping needs with the other circuit of the pump.

US Patent:

6447244, Sep 10, 2002

Filed:

May 10, 2000

Appl. No.:

09/567883

Inventors:

Martin A. Clements - North Royalton OH

Assignee:

Argo-Tech Corporation - Cleveland OH

International Classification:

F01D 302

US Classification:

415 98, 415100, 415102, 415206, 415 1

Abstract:

A method of increasing the pressure of a fluid in an aircraft centrifugal pump by forcing the fluid to make multiple passes through one impeller of the aircraft centrifugal pump is provided. It includes providing fluid through a pump inlet to an aircraft impeller inlet. The fluid then exits the impeller through a first set of discharge ports and the exiting fluid is directed to a second inlet on the same impeller. The fluid then exits the impeller through a second set of discharge ports to a pump outlet. Each pass through the impeller by the fluid increases the pressure thereof.

US Patent:

6447262, Sep 10, 2002

Filed:

May 10, 2000

Appl. No.:

09/567885

Inventors:

Martin A. Clements - North Royalton OH

Assignee:

Argo-Tech Corporation - Cleveland OH

International Classification:

F04B 2500

US Classification:

417251, 417244, 417250, 417286

Abstract:

A pumping system for selectively activating the stages of a multi-stage centrifugal pump is provided. The pumping system has a first stage impeller for receiving fluid into the system and imparting rotational energy into the fluid. The system also has a second stage impeller for centrifugally imparting additional rotational energy into the fluid after the first stage impeller. A valve selectively closes an inlet to the second stage impeller so that the system operates as a single stage centrifugal pump while the second stage impeller remains wetted.

US Patent:

6675570, Jan 13, 2004

Filed:

Jun 15, 2001

Appl. No.:

09/882858

Inventors:

Timothy A. Herbison - Lyndhurst OH
Martin A. Clements - North Royalton OH
Robert J. Nyzen - Munson Township OH

Assignee:

Argo-Tech Corporation - Cleveland OH

International Classification:

F02C 926

US Classification:

60 39281

Abstract:

A fuel system for providing a desired fuel flow to an engine comprises a metering assembly for providing a variable portion of metered fuel flow to an associated nozzle system. The variable portion corresponds to a variable demand signal received by the metering assembly. A centrifugal pumping assembly is adapted to receive fuel from an associated pumping system. The centrifugal pumping assembly is capable of pressurizing and delivering adequate fuel flow to the metering assembly. A throttling valve is in fluid communication between the metering assembly and the centrifugal pumping assembly to maintain a constant pressure rise across the metering assembly. An electronic engine control provides the variable demand signal to the metering assembly.

US Patent:

6810674, Nov 2, 2004

Filed:

Jul 18, 2002

Appl. No.:

10/198488

Inventors:

Martin A. Clements - North Royalton OH

Assignee:

Argo-Tech Corporation - Cleveland OH

International Classification:

F02C 928

US Classification:

60773, 60 39281

Abstract:

A fuel delivery system provides for closed loop mass flow control of fuel between a metering valve and a pump, such as a variable delivery pump. Changes in pressure across the metering valve are monitored and pump operation is altered in response thereto. A thermal controller monitors fuel temperature and recirculates a portion of the fuel flow through a heat exchanger. The fuel delivery system can be provided as original equipment or as a retrofit.

US Patent:

7108493, Sep 19, 2006

Filed:

Mar 27, 2002

Appl. No.:

10/474225

Inventors:

Martin A. Clements - North Royalton OH, US
Lowell D. Hansen - Sagamore Hills OH, US

Assignee:

Argo-Tech Corporation - Cleveland OH

International Classification:

F03C 2/00
F04C 14/18

US Classification:

418 30, 418 1, 418 31, 418152, 418173

Abstract:

Vane pump () mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring () is supported by a journal bearing (). A relatively low sliding velocity is imposed between the cam ring and the vanes (). This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits.

US Patent:

7247008, Jul 24, 2007

Filed:

Jul 21, 2003

Appl. No.:

10/521637

Inventors:

Martin A. Clements - North Royalton OH, US
Robert Nyzen - Chardon OH, US

Assignee:

Argo-Tech Corporation - Cleveland OH

International Classification:

F03C 2/00
F04C 18/00

US Classification:

418 30, 418 31, 418173, 384308

Abstract:

A bearing assembly is provided for a fuel delivery system that includes a pump () having a housing that rotatably receives a rotor () carrying vanes () thereon, a cam ring () received between the housing and rotor (), and a support member of yoke () encompassing the cam ring () to selectively vary fuel flow. The bearing assembly () is a journal bearing between the yoke () and the cam ring () and includes an annular surface having a central opening therethrough. The annular surface includes a first, high pressure pad () and a second, low pressure pad () substantially diametrically opposite the first pad and separated by first and second lands (). The circumferential extent of the first pad () is at least as great as an inner diameter of the cam ring (). Circumferential ends of the second pad () are wider than circumferential ends of the first pad. The first and second pads () are formed by circumferentially extending grooves that extend an entire width of the bearing so that the cam ring moves between the first and second pads, and thereby varies a clearance between the lands () and the cam ring ().