Patents by Inventor Steven C. Walko
Steven C. Walko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 6775900Abstract: A stator and a method of forming the stator comprises providing a stator frame having a frame plate, and connecting key bars to the frame plate at respective connection points, each of the key bars having a dovetail. The stator and method further includes providing a stator core comprising laminations each having a dovetail slot formed therein. Each dovetail is engaged into a respective dovetail slot so that at least some of the dovetails contact respective laminations at respective contact points. The locations of the contact points are controlled such that a force load transmitted by the contact points is evenly distributed among the contact points to thus minimize the maximum force transmitted. The location of the contact points is controlled such that a key bar stress at the connection points is also minimized.Type: GrantFiled: February 13, 2002Date of Patent: August 17, 2004Assignee: General Electric CompanyInventors: Richard Nils Dawson, John A. Petti, Steven C. Walko, Robert J. Nygard
-
Patent number: 6766572Abstract: A stator comprises a stator frame, a plurality of key bars connected to the stator frame and a stator core. Each of the key bars has a dovetail. The stator core is formed by a pre-packaged stator core section including laminations each having a dovetail slot for engaging a respective dovetail. The stator core also includes a manually stacked stator core section including manually stacked laminations each having a dovetail slot for engaging respective dovetails. The cross-sectional area of the dovetail slots in the pre-packaged stator core section is larger than the cross-sectional area of the dovetail slots of the manually stacked stator core section.Type: GrantFiled: January 17, 2002Date of Patent: July 27, 2004Assignee: General Electric CompanyInventors: Richard Nils Dawson, John A. Petti, Steven C. Walko, Robert J. Nygard
-
Patent number: 6597081Abstract: A stator and a method of forming the stator comprises providing a stator frame having a frame plate, and connecting key bars to the frame plate at respective connection points, each of the key bars having a dovetail. The stator and method further includes providing a stator core comprising laminations each having a dovetail slot formed therein. Each dovetail is engaged into a respective dovetail slot so that at least some of the dovetails contact respective laminations at respective contact points. The locations of the contact points are controlled such that a force load transmitted by the contact points is evenly distributed among the contact points to thus minimize the maximum force transmitted. The location of the contact points is controlled such that a key bar stress at the connection points is also minimized.Type: GrantFiled: December 8, 2000Date of Patent: July 22, 2003Assignee: General Electric CompanyInventors: Richard Nils Dawson, John A. Petti, Steven C. Walko, Robert J. Nygard
-
Patent number: 6448686Abstract: A stator comprises a stator frame, a plurality of key bars connected to the stator frame and a stator core. Each of the key bars has a dovetail. The stator core is formed by a pre-packaged stator core section including laminations each having a dovetail slot for engaging a respective dovetail. The stator core also includes a manually stacked stator core section including manually stacked laminations each having a dovetail slot for engaging respective dovetails. The cross-sectional area of the dovetail slots in the pre-packaged stator core section is larger than the cross-sectional area of the dovetail slots of the manually stacked stator core section.Type: GrantFiled: December 8, 2000Date of Patent: September 10, 2002Assignee: General Electric CompanyInventors: Richard Nils Dawson, John A. Petti, Steven C. Walko, Robert J. Nygard
-
Publication number: 20020070629Abstract: A stator comprises a stator frame, a plurality of key bars connected to the stator frame and a stator core. Each of the key bars has a dovetail. The stator core is formed by a pre-packaged stator core section including laminations each having a dovetail slot for engaging a respective dovetail. The stator core also includes a manually stacked stator core section including manually stacked laminations each having a dovetail slot for engaging respective dovetails. The cross-sectional area of the dovetail slots in the pre-packaged stator core section is larger than the cross-sectional area of the dovetail slots of the manually stacked stator core section.Type: ApplicationFiled: December 8, 2000Publication date: June 13, 2002Inventors: Richard Nils Dawson, John A. Petti, Steven C. Walko, Robert J. Nygard
-
Publication number: 20020070628Abstract: A stator comprises a stator frame, a plurality of key bars connected to the stator frame and a stator core. Each of the key bars has a dovetail. The stator core is formed by a pre-packaged stator core section including laminations each having a dovetail slot for engaging a respective dovetail. The stator core also includes a manually stacked stator core section including manually stacked laminations each having a dovetail slot for engaging respective dovetails. The cross-sectional area of the dovetail slots in the pre-packaged stator core section is larger than the cross-sectional area of the dovetail slots of the manually stacked stator core section.Type: ApplicationFiled: January 17, 2002Publication date: June 13, 2002Applicant: General Electric CompanyInventors: Richard Nils Dawson, John A. Petti, Steven C. Walko, Robert J. Nygard
-
Publication number: 20020070630Abstract: A stator and a method of forming the stator comprises providing a stator frame having a frame plate, and connecting key bars to the frame plate at respective connection points, each of the key bars having a dovetail. The stator and method further includes providing a stator core comprising laminations each having a dovetail slot formed therein. Each dovetail is engaged into a respective dovetail slot so that at least some of the dovetails contact respective laminations at respective contact points. The locations of the contact points are controlled such that a force load transmitted by the contact points is evenly distributed among the contact points to thus minimize the maximum force transmitted. The location of the contact points is controlled such that a key bar stress at the connection points is also minimized.Type: ApplicationFiled: December 8, 2000Publication date: June 13, 2002Inventors: Richard Nils Dawson, John A. Petti, Steven C. Walko, Robert J. Nygard
-
Publication number: 20020070631Abstract: A stator and a method of forming the stator comprises providing a stator frame having a frame plate, and connecting key bars to the frame plate at respective connection points, each of the key bars having a dovetail. The stator and method further includes providing a stator core comprising laminations each having a dovetail slot formed therein. Each dovetail is engaged into a respective dovetail slot so that at least some of the dovetails contact respective laminations at respective contact points. The locations of the contact points are controlled such that a force load transmitted by the contact points is evenly distributed among the contact points to thus minimize the maximum force transmitted. The location of the contact points is controlled such that a key bar stress at the connection points is also minimized.Type: ApplicationFiled: February 13, 2002Publication date: June 13, 2002Applicant: General Electric CompanyInventors: Richard Nils Dawson, John A. Petti, Steven C. Walko, Robert J. Nygard
-
Patent number: 6127761Abstract: A seal for a generator stator end winding seals the gap between the annular air shield and a radially inner surface of the stator end winding. The seal includes a first flat piece layer formed of a flexible rubber material and having an inner diameter side and an outer diameter side. A plurality of first radial slits are formed across the outer diameter side. A second flat piece layer is disposed in a layered configuration with the first flat piece layer. The second flat piece layer is formed of the same flexible rubber material. A plurality of second radial slits are formed across the outer diameter side of the second flat piece layer and are offset from the first radial slits in the layered configuration. The seal is secured in a radial groove formed in an end of the air shield by a locking dowel and/or glue. With this arrangement, a reliable seal is configured that is inexpensive to manufacture and easy to install.Type: GrantFiled: October 19, 1999Date of Patent: October 3, 2000Assignee: General Electric Co.Inventors: Liping Shen, James J. Grant, Steven C. Walko
-
Patent number: 5075959Abstract: A method and apparatus for the assembly and disassembly of dovetail shaped wedges into and from the coil slots of dynamoelectric rotors using a fixture attached to a rotor shaft coupling in a selectable radial position so as to be aligned with a rotor slot. The method and apparatus further uses a pulling tool attached to a wedge and also connected to a winch located on the fixture via a winch belt extending between the tool and fixture.Type: GrantFiled: July 26, 1990Date of Patent: December 31, 1991Assignee: General Electric CompanyInventors: Richard J. Keck, Dennis R. Ulery, Steven C. Walko
-
Patent number: 5027500Abstract: A method and apparatus for the assembly and disassembly of dovetail shaped wedges into and from the coil slots of dynamoelectric rotors using a fixture attached to a rotor shaft coupling in a selectable radial position so as to be aligned with a rotor slot. The method and apparatus further uses a pulling tool attached to a wedge and also connected to a winch located on the fixture via a winch belt extending between the tool and fixture.Type: GrantFiled: November 8, 1990Date of Patent: July 2, 1991Assignee: General Electric CompanyInventors: Richard J. Keck, Dennis R. Ulery, Steven C. Walko
-
Patent number: 4859891Abstract: A U-shaped subslot liner is disposed in the bottom of a slot in the rotor of a dynamoelectric machine. A stack of conductors and insulating layers is supported by arms of the subslot liner durig manufacture. The subslot liner, together with the lower conductor, defines a coolant channel for conveying a gaseous coolant to the conductors. A slot armor lines the sides of the slots where it is retained against centrifugal acceleration by the subslot liner. In one embodiment, the slot armor passes completely under the subslot liner. In other embodiments, the slot armor is in two pieces, each affixed to the subslot liner.Type: GrantFiled: April 8, 1988Date of Patent: August 22, 1989Assignee: General Electric CompanyInventors: Thomas B. Jenkins, Dennis R. Ulery, Blake W. Wilson, Steven C. Walko, Lester H. Lee, Robert P. Salerno, Robert W. Nason, John P. Courtney