David Edward Ewel

US Patent:

6866348, Mar 15, 2005

Filed:

Apr 5, 2001

Appl. No.:

09/827335

Inventors:

David E. Ewel - Mankato MN, US

Assignee:

Mico, Inc. - North Mankato MN

International Classification:

B60T008/34

US Classification:

3031131, 3031171, 303155

Abstract:

A hydraulic braking system having an electronically controlled full power brake valve is disclosed. The hydraulic braking system supplies a braking output for a vehicle having at least one brake. The hydraulic braking system includes a primary valve assembly that is configured to receive a manually controlled input that varies the braking output of the braking system. The primary valve assembly includes a first spool valve configured to vary the braking output according to the manually controlled input. The hydraulic braking system also includes a secondary valve assembly integral with the primary valve assembly. The secondary valve assembly is configured to receive input signals from a programmable electronic controller and includes a second spool valve configured to operate with the primary valve assembly. The secondary valve assembly also includes an actuator for engaging and actuating the second spool valve according to the input signals received from the programmable electronic controller such that the second spool valve modulates the braking output produced by the primary valve assembly.

US Patent:

20060053957, Mar 16, 2006

Filed:

Jul 8, 2004

Appl. No.:

10/887462

Inventors:

David Ewel - Mankato MN, US
Craig Lapoint - North Mankato MN, US

International Classification:

G05G 1/14

US Classification:

074560000

Abstract:

An electronic pedal assembly including a pedal and a base. The pedal is pivotally mounted to the base by a mounting arrangement. The assembly includes a spring arrangement. The spring arrangement is retained by a number of spring retaining constructions, including arms formed on the pedal and a retaining pin. The pedal rotates relative to the base. Rotation is at least partially limited by a tab form on a bearing structure of the pedal. The base of the electronic pedal assembly includes an integral sensor housing configured to receive a sensor. Assembly is accomplished by inserting the bearing structure of the pedal within a receiving hub formed in the sensor housing of the base.

US Patent:

59606940, Oct 5, 1999

Filed:

Feb 23, 1998

Appl. No.:

9/028218

Inventors:

David W. Thomas - Plymouth MN
David E. Ewel - Eden Prairie MN
Timothy A. Hjelsand - Waconia MN
Jerry F. Carlin - Mound MN
Russell P. Schuchmann - Milwaukee WI

Assignee:

Eaton Corporation - Cleveland OH

International Classification:

F15B 903
F16D 3102

US Classification:

91363R

Abstract:

A hydrostatic power steering system comprising a fluid motor (19) which receives pressurized fluid from a controller (17) in response to the rotation of a vehicle steering wheel (W). As the motor (19) or the steered wheels reach the stops, control logic (31) receives signals (37,77) representing steered wheel and steering wheel position, respectively, and generates appropriate command signals (33,27) to a pressure reducing/relieving valve (15) and to a proportional electromagnetic valve (23), respectively, closing the valve (15) somewhat, and opening the valve (23). A pressure differential is built between an additional fluid path (21) and the high pressure conduit (15c) between the controller (17) and the fluid motor (19). Pressure is communicated through the valve (23) into the conduit (51c), and back into the fluid meter (43) of the controller, preventing any further rotation thereof in response to an attempt to turn the steering wheel, thus eliminating travel limit slip.

US Patent:

20170225665, Aug 10, 2017

Filed:

Feb 6, 2017

Appl. No.:

15/425606

Inventors:

- Mankato MN, US
David E. Ewel - Mankato MN, US

International Classification:

B60T 7/20
B60Q 1/00
H01H 45/02
B60Q 1/26

Abstract:

A trailer break-away switch comprises an electromechanical means to energize a towed trailer brake in the event of unintended decoupling of the trailer from the towing vehicle. When in normal operation, the trailer break-away switch operates as a normally open switch between the stored energy source (the battery) on the trailer and the trailer brake system. In the event of unintended decoupling of the trailer from the towing vehicle, a pin is pulled from the trailer break-away switch, which activates the switch. Activating the switch allows electrical power to be connected to the trailer brake system. In some cases, the switch directly connects a trailer battery to the electromagnetic coils of the electric brakes.