Donald H Sheffield

US Patent:

8029471, Oct 4, 2011

Filed:

Aug 19, 2005

Appl. No.:

11/208318

Inventors:

Donald H. Sheffield - Farmers Branch TX, US
Thomas G. Fulbright - Keller TX, US

International Classification:

A61M 5/178

US Classification:

60416401

Abstract:

An access device is disclosed that comprises two main assemblies. The first assembly is the cylindrical cannulation assembly. This is the needle-point-bearing assembly which facilitates cannulation (i. e. , insertion of the assembly into the arm of the patient). The cylindrical cannulation assembly comprises a cannulation cylinder which has an insertion point (i. e. , the needle puncture point) at a first end. The second main assembly of the invention is the cylindrical conduit assembly. This is the assembly that facilitates fluid flow during treatment free of the worry that the very needle which facilitated access will internally lacerate the blood vessel. The cylindrical conduit assembly comprises a cylindrical conduit which is telescopically positioned within the cannulation cylinder. The cannulation cylinder and cylindrical conduit longitudinally move relative to one another.

US Patent:

39643808, Jun 22, 1976

Filed:

May 16, 1975

Appl. No.:

5/578046

Inventors:

Charles H. Meyer - Dallas TX
Donald H. Sheffield - Dallas TX
George N. Willman - Dallas TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

B65B 1302

US Classification:

100 9

Abstract:

An apparatus for handling sheets of material of various lengths such as consecutive plots from a computer printout device. The apparatus is comprised of a housing adapted to be affixed to a source such as the output section of a computer printout device. A takeup roller is mounted in the housing and is adapted to receive the material as it is fed from the source. When all of the material of a particular sheet has been rolled, a means ejects the material off the roller. As the roll of material is ejected from the roller, a securing means, e. g. , elastic band, is automatically applied to the material to secure it in a rolled condition.