Gregory Paul Burrett

US Patent:

6807987, Oct 26, 2004

Filed:

Sep 12, 2001

Appl. No.:

09/952664

Inventors:

Steven D. Hill - Battle Creek MI 49017
Gregory Burrett - East LeRoy MI 49051

International Classification:

F16L 5500

US Classification:

138104, 138178

Abstract:

A location marker according to this invention includes a housing that has a top surface and a bottom surface. A pot magnet is secured in the housing. The pot magnet includes a magnet that has a single magnetic pole surface and is positioned in a case component. The pot magnet is positioned in the marker housing so that the magnetic pole surface is in opposition to the bottom surface of the marker housing.

US Patent:

6009897, Jan 4, 2000

Filed:

Jul 29, 1998

Appl. No.:

9/124432

Inventors:

Steven D. Hill - Battle Creek MI
Gregory P. Burrett - East LeRoy MI

International Classification:

F16K 3700

US Classification:

137364

Abstract:

The present invention relates to a valve lock for blocking access to a valve mounted in an access pipe. The valve lock includes a key housing and a key for actuating a valve lock mechanism. The key housing has a diameter less than the inner diameter of the access pipe. The valve lock mechanism includes semi-cylindrical closure wedges having inclined surfaces that are engaged by wedges. The valve lock mechanism is activated by reducing the distances between the wedges forcing the closure wedges radially outwardly so that the outer semi-cylindrical surface of the closure wedges engage the inner wall surface of the access pipe.