Ian A Macleod

US Patent:

6530529, Mar 11, 2003

Filed:

Oct 5, 2001

Appl. No.:

09/972143

Inventors:

Ian J. MacLeod - Ames IA
Guy T. Stoever - Naperville IL

Assignee:

Case Corporation - Racine WI

International Classification:

G05D 2312

US Classification:

236 93R, 236 99 K

Abstract:

The invention provides a method and system for regulating pressure equalization in hydraulic mechanisms. The system includes a main body, a thermal element positioned within the main body, a pin positioned adjacent to the thermal element, and an orifice spool in communication with the pin. The thermal element expands to force the pin to reposition the orifice spool, and restrict fluid flow through the main body. The method includes expanding a thermal polymer when temperature increases, contracting the thermal polymer when the temperature decreases, and metering fluid flow based on the expanding and contracting of the thermal polymer.

US Patent:

20030002972, Jan 2, 2003

Filed:

Jun 27, 2001

Appl. No.:

09/893257

Inventors:

Ian MacLeod - Ames IA, US

International Classification:

E02F003/633

US Classification:

414/695500

Abstract:

A control system for swing cylinders to position a boom on a backhoe or the like includes a pair of double acting hydraulic cylinders on the backhoe frame operatively connected to the boom for swinging the boom with respect to the frame, a closed circuit pump arranged in a closed circuit with the hydraulic cylinders such that the control on the pump is the sole means of controlling the cylinders.

US Patent:

20050060995, Mar 24, 2005

Filed:

Sep 18, 2003

Appl. No.:

10/666218

Inventors:

Ian MacLeod - Ames IA, US

Assignee:

Sauer-Danfoss Inc. - Ames IA

International Classification:

F16D031/02

US Classification:

060452000

Abstract:

An open circuit system that uses a two-position three-way logic valve that automatically compensates for remote pressure in the system. The system has a pump that sends a pump supply through an orifice to the two-position three-way logic valve. Then depending on the load sense signal, the valve either allows the flow of the pump supply to the compensation relief valve or alternatively, the logic valve prevents the flow from the pump supply. The load sensing signal determines whether the valve will allow flow from the pump supply.

Address:

4406 Lorton Ave, Davenport, IA 52807

VIN:

2G1WD58C289288849

Make:

CHEVROLET

Model:

IMPALA

Year:

2008