Patents by Inventor Val A. Kagan

Patent number: 7034263
Abstract: A system and method for inductive heating, in which a power source provides current pulses with high-frequency harmonics to a heater coil, the coil generating a magnetic flux for inductive heating of an article. The high-frequency harmonics enhance a relative proportion of inductive heating, compared to resistive heating of the heater coil. Providing these high-frequency harmonics, occurring above the border frequency of the heating system, enables the system to deliver an increased proportion of inductive heating, compared to resistive heating, without requiring an increase in the Root Means Square (RMS) current in the coil. Providing better coupling between the coil and the core, such as by embedding the coil wholly or at least partially in the core, and providing a magnetic yoke to close the loop with the core, can provide a significantly decreased border frequency.
Type: Grant
Filed: July 2, 2003
Issued: April 25, 2006
Assignee: iTherm Technologies, LP
Inventor: Val Kagan
Application number: 20050067084
Abstract: A thermoplastic article is produced by welding or injection molding. The mechanical performance of the article is optimized by a method employing a plurality of test samples also produced by welding or injection molding. For welding, each test sample comprises two thermoplastic workpieces welded at an interface having a preselected shape. The test samples are prepared using different welding conditions and tested. The results are used to select injection molding conditions for the first and second workpieces. For injection molding, each test sample is prepared with a knit line having a preselected shape. The test samples are injection molded using different conditions and tested. The results are used to select welding conditions for the first and second workpieces. The test samples are much easier to prepare than samples that have to be machined from full-scale articles made under the requisite variety of experimental conditions heretofore required for process optimization.
Type: Application
Filed: September 3, 2004
Issued: March 31, 2005
Inventors: Val Kagan, Christopher Roth
Application number: 20050000959
Abstract: A system and method for inductive heating, in which a power source provides current pulses with high-frequency harmonics to a heater coil, the coil generating a magnetic flux for inductive heating of an article. The high-frequency harmonics enhance a relative proportion of inductive heating, compared to resistive heating of the heater coil. Providing these high-frequency harmonics, occurring above the border frequency of the heating system, enables the system to deliver an increased proportion of inductive heating, compared to resistive heating, without requiring an increase in the Root Means Square (RMS) current in the coil. Providing better coupling between the coil and the core, such as by embedding the coil wholly or at least partially in the core, and providing a magnetic yoke to close the loop with the core, can provide a significantly decreased border frequency.
Type: Application
Filed: July 2, 2003
Issued: January 6, 2005
Inventor: Val Kagan
Patent number: 6726790
Abstract: A frictionally welded, filled thermoplastic article is strengthened by restricting lateral flow of molten material out of the gap between the workpieces, so that a molten pool of substantial depth is maintained from the beginning of melting to the onset of solidification. The restriction to lateral flow of material is provided by dams (projections) of essentially rectangular cross-section at each lateral edge of one of the workpieces, while the other workpiece has a substantially flat mating surface.
Type: Grant
Filed: June 17, 2002
Issued: April 27, 2004
Assignee: BASF Aktiengesellschaft
Inventors: Val A. Kagan, Chul S. Lee
Patent number: 6705268
Abstract: A co-injection molded air intake manifold shell comprises an inner and outer skin layer separated by a sound absorbing or sound insulation core. Each skin layer is composed of a polyamide resin which, optionally, contains glass fiber reinforcement and high specific gravity fillers such as barium sulfate or tungsten. The sound insulating core is composed of a high density material having a foam structure, such as a polyamide resin. Skin layers are provided with a plurality of pockets to permit distribution of localized lumped masses at predetermined locations tailored to increase noise transmission losses. A single layer air intake manifold shell having non-uniform thickness is also provided. The thickness of the single layer air intake manifold shell is larger over preselected noise sources of larger amplitude to maximize noise attenuation for a nominal air intake manifold shell thickness.
Type: Grant
Filed: September 21, 2001
Issued: March 16, 2004
Assignee: BASF Aktiengesellschaft
Inventors: Emile N. Homsi, Thomas J. Krolick, Chul S. Lee, Peter K. Han, Val A. Kagan
Application number: 20030219602
Abstract: A first workpiece having a first mating surface and a second workpiece having a second mating surface are joined by an ultrasonic welding method to form a joined article. Each of the workpieces is composed of a thermoplastic material. Joining is accomplished by a method comprising the steps of: (i) placing an auxiliary energy director in contact with the first mating surface; (ii) bringing the second mating surface into close proximity with the first mating surface and into contact with the auxiliary energy director; (iii) imposing a compressive force urging the first and second mating surfaces into contact; (iv) activating a source that applies ultrasonic vibration to one of the workpieces for a time sufficient to cause melting of at least a portion of each of the first and second workpieces; (v) discontinuing the application of ultrasonic vibration; and (vi) cooling the workpieces to allow the melted portions to solidify, thereby forming the joined article.
Type: Application
Filed: March 28, 2002
Issued: November 27, 2003
Inventor: Val A. Kagan
Application number: 20030155062
Abstract: A frictionally welded, filled thermoplastic article is strengthened by restricting lateral flow of molten material out of the gap between the workpieces, so that a molten pool of substantial depth is maintained from the beginning of melting to the onset of solidification. The restriction to lateral flow of material is provided by dams (projections) of essentially rectangular cross-section at each lateral edge of one of the workpieces, while the other workpiece has a substantially flat mating surface.
Type: Application
Filed: June 17, 2002
Issued: August 21, 2003
Assignee: Honeywell International Inc.
Inventors: Val A. Kagan, Chul S. Lee
Application number: 20030062012
Abstract: A co-injection molded air intake manifold shell comprises an inner and outer skin layer separated by a sound absorbing or sound insulation core. Each skin layer is composed of a polyamide resin which, optionally, contains glass fiber reinforcement and high specific gravity fillers such as barium sulfate or tungsten. The sound insulating core is composed of a high density material having a foam structure, such as a polyamide resin. Skin layers are provided with a plurality of pockets to permit distribution of localized lumped masses at predetermined locations tailored to increase noise transmission losses. A single layer air intake manifold shell having non-uniform thickness is also provided. The thickness of the single layer air intake manifold shell is larger over preselected noise sources of larger amplitude to maximize noise attenuation for a nominal air intake manifold shell thickness.
Type: Application
Filed: September 21, 2001
Issued: April 3, 2003
Inventors: Emile N. Homsi, Thomas J. Krolick, Chul S. Lee, Peter K. Han, Val A. Kagan
Patent number: 6447866
Abstract: A frictionally welded, filled thermoplastic article is strengthened by restricting lateral flow of molten material out of the gap between the workpieces, so that a molten pool of substantial depth is maintained from the beginning of melting to the onset of solidification. The restriction to lateral flow of material is provided by dams (projections) of essentially rectangular cross-section at each lateral edge of one of the workpieces, while the other workpiece has a substantially flat mating surface.
Type: Grant
Filed: December 23, 1999
Issued: September 10, 2002
Assignee: Honeywell International Inc.
Inventors: Val A. Kagan, Chul S. Lee
Patent number: 6193133
Abstract: Two polygon shaped articles having walls of different thicknesses are mated and welded together. Specimens cut from this composite part are used to evaluate the performance of welded joints with the influence of design, processing conditions such as welding, molding, and the like, and material composition. The evaluation advantageously provides an accurate predictor for linear vibration, orbital vibration, hot plate, hot gas, hot gas extrusion and infrared welding at a variety of bead thicknesses.
Type: Grant
Filed: November 19, 1999
Issued: February 27, 2001
Assignee: AlliedSignal Inc.
Inventors: Val A. Kagan, Chul S. Lee