JAN S POROWSKI
Engineers in Pittsburgh, PA

5185123, Feb 9, 1993

Apr 10, 1992

7/866412

Jan S. Porowski - Pittsburgh PA
Edward J. Hampton - Pittsburgh PA
Manohar L. Badlani - Pittsburgh PA
William J. O'Donnell - Pittsburgh PA

G21C 1900

376277

Apparatus suitable for annealing the interior walls of a nuclear reactor which comprises a nuclear reactor shell, a cap securely attached to the nuclear reactor shell, wherein the cap has an inlet line for the introduction of a hot gas under high pressure and an outlet line for removing low pressure gas from the interior of the apparatus, means, such as a cylindrical shell, that helps define an annular space adjacent to the vertical walls of the reactor through which gas can flow and means for directing low pressure gas to the outlet line.

4702880, Oct 27, 1987

Jul 7, 1986

6/882256

Jan S. Porowski - Pittsburgh PA
Manu L. Badlani - Pittsburgh PA
William J. O'Donnell - Bethel Park PA
Edward J. Hampton - Murrysville PA

O'Donnell & Associates, Inc. - Pittsburgh PA

G21C 104

376305

A process for improving resistance of control rod guide tube split pins in nuclear reactors to stress corrosion cracking comprising heating the split pin to a critical elevated temperature level, cooling at least the surface portions of the split subject to stress corrosion cracking and then permitting the split pin to come to ambient temperature.

4817441, Apr 4, 1989

May 2, 1988

7/188914

Jan S. Porowski - Pittsburgh PA
Manu L. Badlani - Pittsburgh PA
Edward J. Hampton - Murrysville PA
William J. O'Donnell - Bethel Park PA

O'Donnell & Associates, Inc. - Pittsburgh PA

G01N 100

7386312

A process for obtaining a gaseous sample from a stream containing solid particulate material, a gas, water and steam which comprises withdrawing a stream containing said particulate material, a gas, water and steam from a system containing the same through an elongated tubular member extending into said system and discharging said stream from said tubular member externally of said system, heating said stream in its passage through said tubular member, removing from said tubular member externally of said system a gaseous sample consisting essentially of said gas and said steam through a porous section of said elongated tubular member having openings in the wall thereof smaller in cross-section than the solid particulate material in said stream, and apparatus for carrying out the same.

4662434, May 5, 1987

Jun 12, 1985

6/744049

Jan S. Porowski - Pittsburgh PA

O'Donnell & Associates, Inc. - Pittsburgh PA

F28F 700

165 69

A novel apparatus comprising a plurality of parallel, spaced apart tubes and an expanded closed, flattened, elongated tube extending laterally between the spaced apart tubes and in firm contact with them. The novel process comprises inserting the closed, flattened elongated tube laterally between the spaced apart tubes and then expanding the elongated tube until it comes into firm engagement with the spaced apart tubes.

4612071, Sep 16, 1986

Apr 1, 1985

6/718439

William J. O'Donnell - Bethel Park PA
Jan S. Porowski - Pittsburgh PA

O'Donnell & Associates, Inc. - Pittsburgh PA

C21D 800

148131

A process for reducing the residual welding stresses in the weld metal, heat-affected zone and in the adjacent base metal of steel piping that have been butt welded to each other end to end by means of a circumferential weld which comprises mechanically introducing compressive stresses in said weld metal, heat-affected zone and adjacent base metal higher than their individual yield strengths but not exceeding their ultimate strengths in compression.

5196160, Mar 23, 1993

Mar 23, 1992

7/855575

Jan S. Porowski - Pittsburgh PA

G21C 1300

376260

A process for improving nozzles extending substantially vertically through openings in the head of a nuclear reactor and which are circumferentially welded to the head through a weld lying on an inner surface of the head and on the adjacent outer surface of the nozzle which comprises forming a coaxial, circumferential groove upwardly into at least a portion of the nozzle extending into the reactor and then filling the coaxial, circumferential groove with a weld material. The nuclear reactor head is also claimed.

5354307, Oct 11, 1994

Oct 14, 1993

8/136096

Jan S. Porowski - Pittsburgh PA
Edward J. Hampton - Murrysville PA

A61B 1732

606171

Surgical means for removing a portion of a body comprising means for applying a vacuum upon the portion of the body to be removed sufficient to move such portion away from the remainder of the body immediately adjacent to such portion and means for cutting such portion of the body that has been moved to sever it from the remainder of the body. The invention is also directed to a process for removing a portion of the body wherein a vacuum is applied to such portion and thereafter is severed from the remainder of the body.

4949781, Aug 21, 1990

Mar 20, 1989

7/326010

Jan S. Porowski - Pittsburgh PA

SMC O'Donnell Inc. - Pittsburgh PA

F28D 710, F28F 1100

165 111

A cooling apparatus that comprises a first elongated metal tube, a second elongated metal tube longitudinally disposed within the first elongated metal tube having a substantial portion of its outer surfaces out of contact with the inner surface of the first elongated metal tube, with the inner metal tube being adapted to provide passage through it of a hot fluid, and means for cooling the outer surface of the first elongated metal tube, whereby at ambient temperatures the tubes can be easily separated for inspection and at operating temperatures the tubes are substantially in contact with each other.

4572548, Feb 25, 1986

Oct 4, 1983

6/539074

Jan S. Porowski - Pittsburgh PA
William J. O'Donnell - Bethel Park PA

O'Donnell & Associates, Inc. - Pittsburgh PA

F16L 2106

285 15

A novel pipelock comprising a first pair of rings facing each other axially, with the inner diameter of each ring at the outer face being smaller than the inner diameter of each ring at the inner face, each of said first pair of rings comprising at least two circumferential parts, means to restrain longitudinal movement of facing circumferential parts outwardly from each other, at least one second ring comprised of at least two circumferential parts connected to each other, outwardly surrounding said first pair of rings, and constraining outward radial movement of said first pair of rings.

4781046, Nov 1, 1988

Feb 16, 1988

7/156530

Jan S. Porowski - Pittsburgh PA

O'Donnell & Associates, Inc. - Pittsburgh PA

B21D 3920, B23P 1102, B23P 1526, B23P 1700

72 58

A tube expander capable of simultaneously applying a plurality of selected radial pressures outwardly at a plurality of sections of a tube interior to provide selected expansions of the sections of the tube.