David R Armstrong

US Patent:

42643902, Apr 28, 1981

Filed:

Sep 17, 1979

Appl. No.:

6/076212

Inventors:

David E. Armstrong - Royal Oak MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B31F 129

US Classification:

156205

Abstract:

An apparatus and method for providing permanent pipe sections in a foam-backed material that utilizes two rotating members which cooperate to form alternate ridges and valleys in the material after which the valley portions are bonded to a backing sheet so as to maintain the pipe sections in the material.

US Patent:

D3162516, Apr 16, 1991

Filed:

Dec 19, 1988

Appl. No.:

7/287982

Inventors:

David Y. Armstrong - San Diego CA

Assignee:

Mosaic Semiconductor, Inc. - San Diego CA

US Classification:

D13182

US Patent:

48568481, Aug 15, 1989

Filed:

Jun 30, 1988

Appl. No.:

7/213668

Inventors:

Terence J. O'Sullivan - Sterling Height MI
George W. Mould - Utica MI
David E. Armstrong - Rochester MI
Graham S. Foulkes - Sterling Height MI
Michael B. Davis - Bloomfield Hills MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

A47C 736

US Classification:

297391

Abstract:

The present invention in a preferred embodiment provides an apparatus and method of utilization there of of a fore and aft adjustable vehicle seat headrest. The headrest includes a base providing means of attachment of the headrest to said vehicle seat. A frame is connected with the base. A cushion support with an attached shaft is slidably mounted with the frame for fore and aft movement. The shaft has a series of unidirectional cam slots. A spring biases the cushion support to a rearward position with respect to the frame. Levers pivotally connected with the frame engage with the shaft slots to set the position of the headrest. Release means are provided to remove the levers and retain the levers from reengagement with the slots upon extreme forward movement of the cushion support thereby allowing the spring to return the cushion support to an extreme rearward position. Additionally, means are provided to reengage the levers with the slots whereby the cushion support is reset in the extreme rearward position.

US Patent:

20210238105, Aug 5, 2021

Filed:

Aug 21, 2019

Appl. No.:

17/270238

Inventors:

- Pacific Palisades CA, US
David Armstrong - Carlsbad CA, US

Assignee:

Cortex Composites, Inc. - Pacific Palisades CA

International Classification:

C04B 40/00
B32B 13/04
B32B 7/12
B28B 19/00

Abstract:

A system for making a cementitious composite includes a cementitious material supply system for dispensing a powdered cementitious material or a semi-powdered cementitious material into a receiving material. The receiving material includes a structural layer and a sealing layer. The structural layer includes an open continuous volume extending from a first side to a second side opposite the first side. The sealing layer is coupled to the first side. The cementitious material supply system is configured to dispense the powdered cementitious material or the semi-powdered cementitious material into the open continuous volume to fill the open continuous volume.