Shiv E Gupta

US Patent:

8113784, Feb 14, 2012

Filed:

Mar 20, 2009

Appl. No.:

12/407818

Inventors:

Shiv C. Gupta - San Diego CA, US

Assignee:

Hamilton Sundstrand Corporation - Windsor Locks CT

International Classification:

F01D 5/30

US Classification:

416193A, 415 95, 415115, 416 96 R, 416 97 R, 416220 R

Abstract:

A rotor blade suitable for use in a gas turbine engine includes an attachment section which defines at least one internal cooling passage along a passage axis through the attachment section.

US Patent:

8172510, May 8, 2012

Filed:

May 4, 2009

Appl. No.:

12/387535

Inventors:

Loc Q. Duong - San Diego CA, US
Shiv C. Gupta - San Diego CA, US
Xiaolan Hu - San Diego CA, US

Assignee:

Hamilton Sundstrand Corporation - Rockford IL

International Classification:

F03D 11/00
B64C 11/04
B63H 1/26
B63H 7/02

US Classification:

415119, 416241 R, 416500, 416228

Abstract:

A gas turbine engine includes a radial compressor having first and second blades. The first blade has a tuned leading edge that prevents either blade from exciting at a natural frequency at speeds within an expected operating speed range.

US Patent:

8172511, May 8, 2012

Filed:

May 4, 2009

Appl. No.:

12/387536

Inventors:

Loc Q. Duong - San Diego CA, US
Shiv C. Gupta - San Diego CA, US
Xiaolan Hu - San Diego CA, US

Assignee:

Hamilton Sunstrand Corporation - Rockford IL

International Classification:

F03D 11/00
F01D 29/00
B63H 1/16
F03B 3/12
B64C 27/20

US Classification:

415119, 416241 R, 416500, 416185

Abstract:

A gas turbine engine includes a radial compressor with first and second blades. The first and second blades have tuned leading edges that prevent natural frequencies from exciting at speeds within an expected operating speed range.

US Patent:

8042406, Oct 25, 2011

Filed:

Jun 16, 2009

Appl. No.:

12/485218

Inventors:

Ron Harvey Rosenfield - San Diego CA, US
Shiv C. Gupta - San Diego CA, US

Assignee:

Hamilton Sundstrand Corporation - Windsor Locks CT

International Classification:

G01M 5/00

US Classification:

73802, 73760

Abstract:

A method and system for determining the reliability of a rotating component compares a normalized stress curve with a normalized strength curve. The resulting overlap corresponds with the reliability of the rotating component.

US Patent:

20110280731, Nov 17, 2011

Filed:

May 17, 2010

Appl. No.:

12/781510

Inventors:

Xinwen Xiao - San Diego CA, US
Shiv C. Gupta - San Diego CA, US
Venkata S. Bandaru - Manchester CT, US
Gordon F. Jewess - San Diego CA, US
Davin Hansen - Vista CA, US

Assignee:

Hamilton Sundstrand Corporation - Windsor Locks CT

International Classification:

F01D 5/30

US Classification:

416214 A

Abstract:

A blade retainer clip for retaining a foot of a turbine blade in a shoe of a turbine disc of a turbine wheel includes: a clip shank that fits into a mating slot in the blade foot; a protuberance along a central portion of the clip shank that fits into a mating recess along the mating slot in the blade foot; a clip heel on one end of the clip shank that engages a heel of the blade foot and a heel of the disc shoe that expands radially from at least opposite sides of the clip shank; and a clip toe that extends beyond a toe of the disc shoe that is deformable to contact at least the toe of the disc shoe.

US Patent:

20110311358, Dec 22, 2011

Filed:

Jun 17, 2010

Appl. No.:

12/818081

Inventors:

Xinwen Xiao - San Diego CA, US
Venkata S. Bandaru - Manchester CT, US
Shiv C. Gupta - San Diego CA, US
Gordon F. Jewess - San Diego CA, US

Assignee:

Hamilton Sundstrand Corporation - Windsor Locks CT

International Classification:

F01D 5/18
F01D 5/30

US Classification:

416 1, 416214 A

Abstract:

A blade retention system for retaining a foot of a turbine blade in a shoe of a turbine disc of a turbine wheel includes: a hook on a heel end of the blade foot that protrudes from a bottom of the blade foot to engage a heel end of the turbine disc shoe; and a compound fillet that engages the hook with the bottom of the blade foot.

US Patent:

53331869, Jul 26, 1994

Filed:

Sep 5, 1991

Appl. No.:

7/755465

Inventors:

Shiv K. Gupta - Red Bank NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H04M 342

US Classification:

379201

Abstract:

A sponsored-call service feature enables callers to obtain network-provided telecommunication services toil-free or at a subsidized rate. The sponsored-call service permits a third party sponsor to convey commercial messages to and interact with a caller prior to the caller's access to the network-provided services. After the caller's interaction with the sponsor, the network gives the caller a sponsored-specified restricted access to the network-provided services.

US Patent:

47887192, Nov 29, 1988

Filed:

Nov 13, 1987

Appl. No.:

7/119881

Inventors:

Shiv K. Gupta - Red Bank NJ

Assignee:

AT & T Information Systems Inc. - Murray Hill NJ

International Classification:

H04M 1516

US Classification:

379114

Abstract:

A call charge allocation arrangement is implemented for a business communication system to track those situations in which a toll call is transferred from a first station to a second station. The arrangement tracks such transfers by establishing a first call record at the time the call is placed and establishing a second call record at the time the call is transferred, such that call charges which accrue prior to the transfer are entered in the first call record and call charges which accrue subsequent to the transfer are entered in the second call record.