David J Hart

Address:

594 Oaklawn Cir, Corbin, KY 40701

VIN:

1GNFK13057R375174

Make:

CHEVROLET

Model:

TAHOE

Year:

2007

US Patent:

6499858, Dec 31, 2002

Filed:

Apr 27, 2001

Appl. No.:

09/842885

Inventors:

David Alan Hart - Dallas TX 75205

International Classification:

F21V 3300

US Classification:

362183, 362253, 362190, 362191, 116 63 C, 340908

Abstract:

An illumination device for use with a safety marker to increase the visibility of said safety marker is described. The illumination device includes a generally circular and hollow bracket supporting an illumination source (e. g. , bulb) and having at least one flange associated therewith. The flange of the bracket is shaped and positioned to removably fit between at least two protruding feet of a traditional safety marker without inhibiting the desired nesting or stacking feature of the safety marker. The illumination source may be powered by a variety of power sources (e. g. , solar panel) and, when attached to the safety marker, provides illumination of the exterior surfaces of the body of the safety marker, thereby greatly increasing the visibility of the safety marker.

US Patent:

20210131218, May 6, 2021

Filed:

Jan 13, 2021

Appl. No.:

17/148292

Inventors:

David Hart - Dallas TX, US

International Classification:

E21B 33/12
E21B 41/00
E21B 33/126

Abstract:

A wellbore tool includes a rod with a plurality of rod sections. The rod is configured to be placed within a wellbore casing of a low-pressure hydrocarbon well. A plurality of sealing elements are positioned at a downhole end of the rod. Each sealing element is configured to provide a gas-tight seal between the sealing element and an inner wall of the wellbore casing. A handle positioned at an uphole end of the rod provides a hand grip for a user of the wellbore tool.

US Patent:

20180238135, Aug 23, 2018

Filed:

Feb 17, 2017

Appl. No.:

15/436350

Inventors:

DAVID HART - Dallas TX, US

International Classification:

E21B 33/12
E21B 17/042
E21B 41/00
E21B 29/10

Abstract:

A wellbore tool includes a rod with a plurality of rod sections. The rod is configured to be placed within a wellbore casing of a low-pressure hydrocarbon well. A plurality of sealing elements are positioned at a downhole end of the rod. Each sealing element is configured to provide a gas-tight seal between the sealing element and an inner wall of the wellbore casing. A handle positioned at an uphole end of the rod provides a hand grip for a user of the wellbore tool.