Donald L Deptowicz

US Patent:

20130255127, Oct 3, 2013

Filed:

Mar 28, 2012

Appl. No.:

13/432557

Inventors:

THOMAS R. MORELAND - Diamond OH, US
Donald Deptowicz - Berthoud CO, US

International Classification:

F41A 21/20

US Classification:

42 7602, 42 761

Abstract:

An improved barrel for use in a weapon includes a housing which is cast as one piece of a directionally solidified superalloy which is free of generally spherical, randomly oriented crystals. The housing has first properties in a direction extending parallel to its central axis and properties which are different than the first properties in a direction transverse to the central axis of the housing. The superalloy forming the housing may be directionally solidified with a columnar grain crystallographic structure. Alternatively, the superalloy of the housing may be directionally solidified with a plurality of single crystal sections, one or more of which extend between opposite end portions of the housing. As another alternative, the superalloy may be directionally solidified as a single crystal which extends between opposite end portions of the housing.

US Patent:

47672609, Aug 30, 1988

Filed:

Nov 7, 1986

Appl. No.:

6/928236

Inventors:

Douglas H. Clevenger - Palm Beach Gardens FL
Donald L. Deptowicz - Palm Beach Gardens FL

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F01D 904

US Classification:

415115

Abstract:

Judiciously dimensioned slots in feather seals between adjacent edges of platforms of segmented stator vane for a gas turbine power plant serves to allow the flow of cooling air through the slots notwithstanding the feather seal shifting.

US Patent:

55991661, Feb 4, 1997

Filed:

Nov 1, 1994

Appl. No.:

8/333157

Inventors:

Donald L. Deptowicz - Hamden CT
Friedrich O. Soechting - Tequesta FL

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F01D 518

US Classification:

416 97R

Abstract:

An airfoil (20) for a gas turbine engine (10) includes cooling passages (40), (50) extending radially within the airfoil to circulate cooling air therethrough. Pluralities of small crossover holes (48), (66), (72) are formed within the walls (50), (68), (74), respectively, to allow cooling air to flow between the cooling passages. Optimum stiffness parameters are provided to improve producability of the airfoils with small geometric features, such as the crossover holes, as well as to improve the overall cooling scheme without jeopardizing manufacturability of airfoils.

US Patent:

53821335, Jan 17, 1995

Filed:

Oct 15, 1993

Appl. No.:

8/137866

Inventors:

Robert P. Moore - Tequesta FL
Donald L. Deptowicz - Palm Beach Gardens FL

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F01D 518

US Classification:

415115

Abstract:

A film cooling passage through the external wall of a hollow airfoil having in serial flow relation a metering section and a diffusing section, the diffusing section characterized in that it has four inward facing surfaces that define a passage having a generally rectangular cross-section and an outlet over which a hot gas stream flows in a "downstream" direction. One of the surfaces of the diffusing section is generally "downstream" of the other surfaces, and this surface defines a section of a circular cylinder.

US Patent:

20160318816, Nov 3, 2016

Filed:

Apr 28, 2015

Appl. No.:

14/697764

Inventors:

- Beachwood OH, US
Donald Deptowicz - Berthoud CO, US

International Classification:

C04B 41/89
B22C 9/12
B22C 3/00
B22C 7/02
B22C 1/00

Abstract:

A composition of a ceramic shell mold, a method of using the ceramic shell mold in investment casting of a structural part, and a structural part formed therefrom is provided. The ceramic shell mold has one or more investment layers formed from slurries and interlayer barriers formed over the investment layers. The interlayer barriers include a self-lubricating soluble solution and grit having a predetermined grit size that is a function of the feature spacing within the structural part. The grit size of each sequential interlayer barrier is at least as large as the grit size of each preceding sequential interlayer barrier.