Donald Raymond Walker

US Patent:

20020059959, May 23, 2002

Filed:

Jan 8, 2002

Appl. No.:

10/042538

Inventors:

Mohamad Qatu - Bloomfield Hills MI, US
Donald Walker - Lake Orion MI, US
Jack Abner - Columbia City IN, US

International Classification:

F16L055/04

US Classification:

138/030000

Abstract:

Apparatus for reducing fluid-borne noise in a hydraulic system that includes a housing that defines a hollow chamber, and inlet and outlet connections for in-line connecting the apparatus in a hydraulic fluid flow system. A resilient member is disposed within the housing and effectively divides the housing chamber into a first portion adjacent to the fluid inlet and outlet for receiving hydraulic fluid, and a second portion remote from the fluid inlet and outlet for containing gas under pressure. Pressure pulsations in the hydraulic fluid are reduced and at least partially absorbed by the combined effect of resiliency of the elastic member and compressibility of the contained gas.

US Patent:

43130330, Jan 26, 1982

Filed:

Jan 21, 1980

Appl. No.:

6/114138

Inventors:

Donald F. Walker - Anaheim CA
Robert G. Phelps - Fullerton CA

Assignee:

Hughes Aircraft Company - Culver City CA

International Classification:

H03K 1322
H04J 304
H04M 356
H04Q 1104

US Classification:

179 1H

Abstract:

Apparatus and method for processing sound as delta modulated digital data bits. A speaker console communicates with a listener console through a central switching unit. Tri-state generators within the central switching unit convert bipolar data modulated speaker data to tri-state logic which is then multiplexed onto a bus. The bus is sampled by a plurality of listener modules of a majority detector unit according to desired speaker combinations and a majority output is thereby determined for each time slot. A data generator modifies a bipolar delta modulated idle waveform according to the state of the idle waveform and the historical output of a listener module, incrementing and decrementing a carry register and a borrow register in the data generator to reflect storage, insertion or cancelling of majority "ones" or "zeros". The combining logic of the data generator enables the central switching unit to produce a combined output having the initial speaker data bit rate.

US Patent:

52732541, Dec 28, 1993

Filed:

Jul 23, 1992

Appl. No.:

7/918986

Inventors:

James McNaughton - Rochester MI
Donald C. Walker - Pontiac MI

Assignee:

Huron Products Industries, Inc. - Mt. Clemens MI

International Classification:

F16L 3728

US Classification:

2511496

Abstract:

A fluid connection includes a valve which blocks flow into or out of the housing until a tube is fully received within the housing. The valve preferably has structure which is biased against the valve seat in the housing until the tube is moved into the housing. The valve seat is preferably in a plane which is perpendicular to the central axis of the housing. Further, the valve preferably has surfaces which guide fluid between the radially outer surface of the valve and the interior of the tube. In one embodiment, the valve includes a forward ring which contacts a tube and which has two ribs connected to the main valve body. The valve surface is preferably a conical surface spaced axially inwardly from the forward ring. Preferably, additional conical surfaces are disposed between the ribs and guide the fluid between the valve surface and the interior of the tube. In another embodiment, the valve may have an X or Y-shaped cross-sectional ribs which contact the tube.

US Patent:

53259459, Jul 5, 1994

Filed:

Sep 23, 1992

Appl. No.:

7/950583

Inventors:

Donald G. Walker - Sterling Heights MI

Assignee:

Rockwell International Corporation - Pittsburgh PA

International Classification:

F16D 5100

US Classification:

188341

Abstract:

A brake support assembly for a vehicle including a stamped metal spider having a planar mounting portion and a pair of diametrically opposed support portions. A first support portion includes a first pair of ribs extending along opposite edges thereof as involuted ribs. A second support portion includes a second pair of ribs extending along opposite edges thereof to form flanges. A bracket extends across and connects the first pair of ribs. The bracket and the first support portion of the spider include laterally spaced apertures which receive press fit sleeve-type bushings. Anchor pins disposed in said sleeve-type bushings carry one end of a pair of brake shoes each comprised of a pair of spaced generally parallel webs secured to a table. The opposite end of the brake shoes is supported by cam follower rollers. Springs bias the brake shoes into contact with a cam actuator which may be rotated to displace the brake shoes.

US Patent:

52578330, Nov 2, 1993

Filed:

Sep 25, 1991

Appl. No.:

7/766619

Inventors:

James McNaughton - Rochester MI
Donald C. Walker - Pontiac MI

Assignee:

Bundy Corporation - Mt. Clemens MI

International Classification:

F16L 3712

US Classification:

285319

Abstract:

A unique retainer is disclosed having a plurality of resilient arms securing a tube within a housing bore. The arms include a radially inner section having a pair of circumferentially extending braces which increase the strength of the arms. The braces have axial ends which are bent radially outwardly and increase the strength of the arms, and also result in a more consistent, predictable buckling force for the retainer. Arm bends are formed between the arm radially inner section and a radially outer section. The axially outer bends of the braces are generally axially aligned with these arm bends, such that the bends provide a planer surface for positioning the retainer within the housing. Also, "bumps" are defined at a radially inner face of the radially inner sections of the arms to create a high force resisting tube insertion. The bumps are at an angle relative to a central axis that is greater than the angle of the remainder of the radially inner section of the arms.

US Patent:

47145358, Dec 22, 1987

Filed:

May 22, 1986

Appl. No.:

6/865758

Inventors:

Robert L. Coombes - La Canada Flintridge CA
Merrill J. Owen - La Canada CA
Terance C. Colwell - West Covina CA
Donald E. Walker - Upland CA

Assignee:

Crown City Plating Co. - El Monte CA

International Classification:

B05C 1100
B05C 1116
C25D 1708
A47F 508

US Classification:

204297W

Abstract:

A platable plastic product substrate assembly is disclosed. The product substrate assembly comprises a runner system having at least one runner and at least one clip for engaging the framework of a plating rack. A plurality of product substrates are removably attached to gates with clip protruding from the runner.

US Patent:

50006142, Mar 19, 1991

Filed:

May 5, 1989

Appl. No.:

7/347981

Inventors:

Donald C. Walker - Pontiac MI
James McNaughton - Rochester MI

Assignee:

Huron Products Corporation - Mt. Clemens MI

International Classification:

F16B 2112
F16L 3714

US Classification:

403326

Abstract:

A quick connector assembly has a female housing with a hair pin style retaining clip to retain a beaded conduit therein. The female housing includes a pair of slots forming ramped surfaces on the housing to enable legs of the retainer to be transversely positioned within the axial bore of the female housing to retain male fittings therein.

US Patent:

44867468, Dec 4, 1984

Filed:

Nov 24, 1981

Appl. No.:

6/324518

Inventors:

Donald F. Walker - Anaheim CA

Assignee:

Hughes Aircraft Company - El Segundo CA

International Classification:

G09G 100

US Classification:

340750

Abstract:

This invention provides a simple system for simultaneous raster scan display of video and alpha-numeric data on a single screen with provision for periodic image refreshment. It includes means for encoding the electrical signals representing the spatial intensity distribution of the video signal and the alpha-numeric signal. The coded signals are stored in a single bit map memory at the desired addresses. For display, the information is simply read from the memory through a single digital-to-analog convertor.