Gregory M Calhoun

US Patent:

7798535, Sep 21, 2010

Filed:

Sep 17, 2007

Appl. No.:

11/856119

Inventors:

Gregory L. Calhoun - Irwin PA, US

Assignee:

Westinghouse Electric Co. LLC - Cranberry Township PA

International Classification:

F16L 21/02

US Classification:

285373, 285328, 285411, 285415, 285419

Abstract:

A pipe clamp for reinforcing a welded joint between two pipes, having a plurality of circumferential clamp segments that are bolted together around the joint. One axial end of the clamp has circumferentially extended ridges that project inward and seat in corresponding circumferential grooves in a pipe on one side of the joint. The other axial end of the clamp has circumferentially spaced fingers that extend inward and fit into corresponding pockets on the other side of the weld joint. Either or both the ridges or the fingers have a taper whose cross-section reduces in an inward direction and fits in complimentary grooves or pockets on either side of the joint. The taper forces the opposite sides of the weld joint toward each other as the clamp segments are tightened together.

US Patent:

61677647, Jan 2, 2001

Filed:

Jun 24, 1999

Appl. No.:

9/339459

Inventors:

Gregory L. Calhoun - North Huntingdon PA

Assignee:

Westinghouse Electric Company LLC - Pittsburgh PA

International Classification:

G01N 308

US Classification:

73837

Abstract:

The tension in a stud is verified by determining the elongation of the stud while attached to a stud tensioner during the tensioning step. The pressure of hydraulic fluid in a hydraulically actuated tensioner is increased from a first low pressure to a higher pressure for elongating the stud while correlating the increase in pressure of the hydraulic fluid with the quantity of hydraulic fluid in the tensioner or with the displacement of a tensioner puller bar or piston. After a nut is tightened on the stud, the pressure of the hydraulic fluid is reduced from the higher pressure to a second low pressure while correlating the decrease in pressure of the hydraulic fluid with the travel of the puller bar or piston or correlating the decrease in pressure of the hydraulic fluid with the change in fluid volume. The elongation of the stud is then determined as a function of the difference in the correlated quantities of hydraulic fluid or the correlated differences in puller bar or piston travel at the first and second low pressures. Finally, the tensioner is detached from the stud.

US Patent:

42386632, Dec 9, 1980

Filed:

Oct 23, 1978

Appl. No.:

5/953658

Inventors:

Gregory L. Calhoun - Monroeville PA
Frank Bauer - Harmony PA
Arthur W. Kramer - Doctor's Inlet FL

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

B23K 900

US Classification:

219121P

Abstract:

One or more pairs of vertically-spaced-apart sidewardly-aimable plasma arc cutting torches, the upper one angled upward and the bottom one downward, on the end of a horizontal boom movable longitudinally fore and aft and angularly sideward, are used to double-cut the tube bundle of a steam generator progressively in a manner clearing a path that accommodates torch assembly advancement.

US Patent:

41920678, Mar 11, 1980

Filed:

Oct 23, 1978

Appl. No.:

5/954041

Inventors:

Gregory L. Calhoun - Monroeville PA
Arthur W. Kramer - Doctors Inlet FL
Frank I. Bauer - Perry Township, Landinburg County PA
William A. Bencloski - Swickley PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

B23D 1906
B23D 2100
B27B 704

US Classification:

30379

Abstract:

Cutting apparatus having spaced apart cutters which can be brought closer together are disposed on one end of a boom which is movable in a plane transverse to the longitudinal axis of a closely packed tube bundle to cut out short segments from the tubes starting at the periphery and working through the tube bundle by bringing the cutters closer together to provide clearance as the cutters move deeper into the tube bundle.

US Patent:

45718024, Feb 25, 1986

Filed:

Apr 30, 1984

Appl. No.:

6/605351

Inventors:

Gregory L. Calhoun - Apollo PA
Michael G. Brunner - Pittsburgh PA
Kevin L. Fields - Pittsburgh PA

International Classification:

B23P 1526

US Classification:

291573R

Abstract:

Both an apparatus and a process for pulling tubes from a tubesheet with two relatively movable gripping means are disclosed herein. The apparatus of the invention is a tube puller which has upper and lower gripping means for gripping the section of the tube surrounded by the tubesheet. The two gripping means are mechanically linked together by means of an extendable connecting assembly. This assembly includes an outer sleeve where the lower gripping means is located, and a middle sleeve where the upper gripping means is located which is slidable a predetermined distance within the outer sleeve. In the process of the invention, a tube puller as heretofore described is inserted into the mouth of a tube. The lower gripping means is then engaged to the mouth of the tube. The upper gripping means is then engaged in a section of the tube beyond the tube mouth with the extendable connecting assembly in a contracted position.