David W Colvin

US Patent:

6373058, Apr 16, 2002

Filed:

Aug 13, 1999

Appl. No.:

09/374361

Inventors:

Richard A. McKinney - Clarksville VA 23927
Yvonne G. Bryant - Raleigh NC 27610
David P. Colvin - Cary NC 27513

International Classification:

F41H 300

US Classification:

250342, 250343, 2504821, 359360, 252587

Abstract:

A method of camouflaging an object emitting infrared radiation by absorbing radiation or by altering its emissive pattern reduces its viewability by an infrared detector. An infrared radiation absorbing and/or altering layer containing microcapsules ( ) is positioned proximate the infrared radiation source. The radiation is absorbed by means of a phase change material or plastic crystals. Concentrations and/or phase change materials are varied to enhance camouflage.

US Patent:

6938290, Sep 6, 2005

Filed:

Apr 21, 2003

Appl. No.:

10/419560

Inventors:

Richard A. McKinney - Clarksville VA, US
Barbara J. McKinney - Clarksvile VA, US
David P. Colvin - Cary NC, US

International Classification:

A47C020/02

US Classification:

5654, 5652, 56553, 29745227

Abstract:

Impact energy forces to the spine are reduced through the use of multiple overlying pliable impact energy absorbing layers. Each layer comprises a plurality of cells that are in fluid communication which provides for a valved transfer of fluid between the cells. Additionally, each layer has a different durometer.

US Patent:

44455020, May 1, 1984

Filed:

Apr 21, 1982

Appl. No.:

6/370468

Inventors:

Algernon G. Swan - Albilene TX
Eugene A. Stead - Clarksville VA
William P. Thompson - Anderson IN
David P. Colvin - Apex NC

International Classification:

A61H 102

US Classification:

128 25R

Abstract:

In this system an inertial reel is mounted beneath a platform, which is carried by a pair of trucks that roll along an overhead rail which is fastened to the ceiling of a hospital corridor or the like. Two, adjustable, rigid handles project downwardly from the platform to be gripped by a patient, who in turn is adapted to be connected by a harness to a retractable tether or cord, which extends downwardly from the inertial reel behind the patient. While gripping the handles the patient may walk beneath the overhead rail, thereby causing the trucks to roll on the rail and to maintain the platform above the patient. If the patient should suddenly stumble or fall, an hydraulic mechanism in the reel automatically brakes the trucks against movement on the rail and resists withdrawal of the cord from the reel, so that the patient is slowly lowered to the floor. The platform is rotatable by the patient 180. degree. relative to the overhead trucks so as to enable the patient to reverse his or her direction of movement.