David Laverne Mccall

US Patent:

6570820, May 27, 2003

Filed:

Jun 18, 2001

Appl. No.:

09/883871

Inventors:

Navin Patel - Friendswood TX
David McCall - Richmond TX

Assignee:

Input/Output, Inc. - Stafford TX

International Classification:

F16K 1100

US Classification:

367144

Abstract:

The present invention provides a pressure-balanced inertial valve assembly for use in marine seismic energy sources such as air guns. The valve includes a poppet having a first seal and a second seal. A pressure chamber containing a fluid under pressure communicating with the first and second seals to substantially balance the pressure across the seals. An inertial mass is coupled to the poppet. A coil assembly is disposed about the inertial mass. A central guide pin provides guided movement for axial translation.

US Patent:

6958314, Oct 25, 2005

Filed:

Mar 5, 2003

Appl. No.:

10/379927

Inventors:

David B. McCall - Detroit MI, US

Assignee:

Master Chemical Corporation - Perrysburg OH

International Classification:

C11D001/66
C11D003/22
C07G003/00

US Classification:

510470, 510471, 510473, 510474, 510475, 510535, 536 41, 536 183, 536 185, 536 43, 536 50, 536 84

Abstract:

A petro-chemical free nonionic surfactant is prepared by the alkylation of an alkyl polyglucoside (APG). Under suitable alkylation reaction conditions, the surfactants are preferably prepared by the reaction of an APG with either alkyl halide or an alkyl tosylate. These surfactants are low foaming and exhibit excellent detergency.

US Patent:

7042803, May 9, 2006

Filed:

Feb 8, 2002

Appl. No.:

10/071105

Inventors:

Shyam Kutty - Stafford TX, US
David McCall - Alvin TX, US

Assignee:

Input/Output Inc. - Stafford TX

International Classification:

G10K 11/00
G01V 1/38

US Classification:

367153, 367 15, 367141, 367144, 367154, 181110, 181118

Abstract:

A marine acoustic source system has relativley densely packed energy sources arrayed in a tandem-like fashion along a horizontal plane. Preferably, a longitudinal axis of each source lies orthogonal to a pre-determined towing direction. The system includes protective tubes that encloses supply lines and auxiliary equipment, and a harness. The harness provides the primary mechanical connection for towing the sources through the water. To minimize bending of the supply lines, connectors having angular portions connect the sources to the supply lines. Further, the sources can be arranged such that source connection interfaces for receiving power, hydraulic fluid, or data point alternately in opposing directions. During use, the sources, e. g. , air guns, are supported at a predetermined depth beneath the water's surface by a floatation buoy.

US Patent:

57031754, Dec 30, 1997

Filed:

Jun 7, 1995

Appl. No.:

8/477146

Inventors:

Donald Borseth - Plymouth MI
David McCall - Detroit MI

Assignee:

Diversey Lever, Inc. - Plymouth MI

International Classification:

C08F 840

US Classification:

525340

Abstract:

A surfactant-modified polymer and method of making the same. The surfactant-modified polymer has a polycarboxylate backbone with nonionic surfactant chemically associated therewith and is formed by the reaction of a reactant compound selected from the group consisting of carboxylic acids, polycarboxylic acids and mixtures thereof in an aqueous media in the presence of a nonionic surfactant.

US Patent:

58689648, Feb 9, 1999

Filed:

Oct 16, 1991

Appl. No.:

7/778458

Inventors:

Donald Borseth - Plymouth MI
David McCall - Detroit MI

Assignee:

Diversey Corporation - Mississauga

International Classification:

B01F 1736
B01F 1752
C11D 106

US Classification:

252356

Abstract:

A surfactant-modified polymer and method of making the same. The surfactant-modified polymer has a polycarboxylate backbone with non-ionic surfactant chemically associated therewith and is formed by the reaction of a reactant compound selected from the group consisting of carboxylic acids, polycarboxylic acids and mixtures thereof in an aqueous media in the presence of a nonionic surfactant.

US Patent:

58257209, Oct 20, 1998

Filed:

Oct 22, 1997

Appl. No.:

8/955827

Inventors:

Earnest R. Harrison - Houston TX
David M. McCall - Richmond TX

Assignee:

Input/Output, Inc. - Strafford TX

International Classification:

H04R 2300

US Classification:

367144

Abstract:

A wear ring assembly for an air gun includes a support ring having a receiving recess of a first length formed in a surface of an end of the support ring. An elastic ring is adjacent an end of the receiving recess. A wear ring seats in the receiving recess and is of a second length, greater than the first length, such that a portion of the wear ring overlaps the end of the support ring, thereby covering and deforming the elastic ring. The wear ring is formed of a thin, low-friction, wear-resistant plastic material having dimensions such that the wear ring does not plastically yield during installation into the receiving recess. Installation is accomplished by attaching a core tool adjacent the seal groove. The wear ring is installed with an expanding pusher tool, over the core tool and into the receiving recess.

US Patent:

48266183, May 2, 1989

Filed:

Jul 9, 1987

Appl. No.:

7/071619

Inventors:

Donald Borseth - Plymouth MI
David McCall - Detroit MI

Assignee:

Diversey Corporation - Mississauga

International Classification:

C11D 1700

US Classification:

25217421

Abstract:

A stable detergent emulsion composed of: (a) a free nonionic surfactant selected from the group consisting of alkylene oxide adducts of polyhydric compounds, alkyl aryl ethoxylates, alcohol ethoxylates and mixtures thereof; (b) a polymeric emulsion stabilizer for the free nonionic surfactant, wherein the polymeric emulsion stabilizer is the reaction product of a reactant compound selected from the group consisting of unsaturated carboxylic acids, polycarboxylic acids, and mixtures thereof polymerized in the presence of a water-soluble nonionic surfactant; and (c) water.