Patents by Inventor Carl A. Bergman
Carl A. Bergman 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).
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Publication number: 20040250713Abstract: The present invention relates to a press which comprises a pressure vessel having an internal closure. The internal closure comprises a cover, a number of elements for transmitting forces in pressurised operation between the cover and the inner wall of the pressure vessel. Each element has a first contact surface adapted to fit a contact surface of the cover and a second contact surface adapted to fit a contact surface of the inner wall of the pressure vessel. Said elements are movable away from said contact surface of the cover and said contact surface of the inner wall of the pressure vessel in the direction of the longitudinal centre axis of the pressure vessel. The invention also relates to a method for opening a pressure vessel.Type: ApplicationFiled: December 3, 2003Publication date: December 16, 2004Inventors: Carl Bergman, Gert Persson
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Patent number: 6558589Abstract: A device for molding objects includes a mold having a molding space enclosed therein and adapted to be filled by a fluid mold material intended to solidify therein. The fluid mold material is injected under pressure into the molding space and solidifies under this high pressure. A chamber receives the mold and is filled with a medium. The medium filling the chamber and surrounding the mold is pressurized. The pressurized medium acts upon the mold from all directions with at least the same pressure magnitude as the pressure of the mold material within the mold. Therefore, the mold is isostatically balanced by the forces acting upon the mold by the mold material and the medium.Type: GrantFiled: July 10, 2000Date of Patent: May 6, 2003Assignee: Flow Holdings GmbH (SAGL) Limited Liability CompanyInventor: Carl Bergman
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Patent number: 6533997Abstract: An isostatic press for hot isostatic pressing having a pressure vessel (1) in which a furnace chamber (2) is arranged with a space (3) between the furnace chamber (2) and the walls of the pressure vessel (2). The furnace chamber (2) has a heat-insulating mantle and heat-insulating top wall and bottom wall, and passageways (5, 6) are arranged in the walls of the furnace chamber (2). A gas outlet means is arranged in the interior of the furnace chamber (2). Gas is removed directly from the furnace chamber (2) by the gas outlet means. Advantages include that treated articles (11) are cooled rapidly, as cooling takes place during the same time as decompression. Articles (11) may also be rapidly cooled to a temperature at which they are easily handled.Type: GrantFiled: May 31, 2001Date of Patent: March 18, 2003Assignee: Flow Holding GmbH (SAGL) Limited Liability CompanyInventor: Carl Bergman
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Patent number: 6514066Abstract: A device in hot isostatic pressing has first, second and third pumps. The first pump is adapted to pump a cooled pressure medium emanating from a cooling loop in the pressure vessel upwardly from a first space to a second pump which is arranged in a second space located above the first space but below a load space. The second pump is arranged to pump a mixture of the cooled pressure medium and a warm pressure medium emanating from the second space upwardly through the load space. The third pump is arranged in the second space to pump a warm pressure medium emanating from this space to the second pump for pumping the warm pressure medium by the second pump.Type: GrantFiled: July 7, 2000Date of Patent: February 4, 2003Assignee: Flow Holdings GmbH (SAGL) Limited Liability CompanyInventor: Carl Bergman
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Patent number: 6512208Abstract: A device in a pressure vessel for hot isostatic pressing utilizing a furnace chamber (3) surrounded by a heat insulating member (4), a carrier (5) arranged in the furnace chamber and adapted for carrying loads (6) and which has lateral walls (8) with a space with respect to said member. An arrangement (12) for heating gases present in the furnace chamber is arranged in the bottom region (11) of the chamber and the lateral walls of the carrier are provided with layers (17) having a high heat insulating capacity.Type: GrantFiled: July 10, 2000Date of Patent: January 28, 2003Assignee: Flow Holdings GmbH (SAGL) Limited Liability CompanyInventor: Carl Bergman
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Patent number: 6331271Abstract: A method of treating parts (34) in a treatment chamber (33) by hot-isostatic pressing with an inert gas as pressure medium and in the presence of a purifying agent (25a) for the inert gas comprises the steps of reducing the pressure in the treatment chamber (33), increasing the pressure again by introducing the inert gas, increasing the temperature in the treatment chamber (33) by activating heating elements (9a), and, after a certain holding time, reducing the pressure and the temperature again. Especially if the purifying agent (25a) is of the same material as the parts (34) being treated, the purifying effect of the purifying agent becomes insufficient. The effect of the purifying agent (25a) is improved according to the invention by bringing the inert gas, at least when being introduced, to circulate such that it is heated, passes through the purifying agent and is thereafter cooled before contacting the parts. The invention also relates to a device for carrying out the method.Type: GrantFiled: June 28, 2000Date of Patent: December 18, 2001Assignee: Flow Holdings GmbH, (SAGL) LLCInventor: Carl Bergman
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Patent number: 6250907Abstract: A method of treating parts (34) in a treatment chamber (33) by hot-isostatic pressing with an inert gas as pressure medium and in the presence of a purifying agent (25a) for the inert gas comprises the steps of reducing the pressure in the treatment chamber (33), increasing the pressure again by introducing the inert gas, increasing the temperature in the treatment chamber (33) by activating heating elements (9a), and, after a certain holding time, reducing the pressure and the temperature again. Especially if the purifying agent (25a) is of the same material as the parts (34) being treated, the purifying effect of the purifying agent becomes insufficient. The effect of the purifying agent (25a) is improved according to the invention by bringing the inert gas, at least when being introduced, to circulate such that it is heated, passes through the purifying agent and is thereafter cooled before contacting the parts. The invention also relates to a device for carrying out the method.Type: GrantFiled: July 29, 1998Date of Patent: June 26, 2001Assignee: Flow Holdings GmbH (SAGL), LLCInventor: Carl Bergman
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Patent number: 5765465Abstract: A high-pressure and a method for high-pressure treatment of substances. The high-pressure press comprises a high-pressure cylinder consisting of a number of concentrically arranged cylinder elements (1, 2, 3). The cylinder elements (1, 2, 3) are radially prestressed to a predetermined prestress and surround a high-pressure chamber (6) for accommodating a pressurized medium. A thin safety liner (3), which is intended to be placed in the high-pressure cylinder until a fracture arises on the safety liner (3), is arranged in the interior of the high-pressure cylinder. Further, means (14, 15) are provided to conduct at least part of the pressurized medium from the high-pressure chamber (6) when a fracture arises on the safety liner (3). The means (14, 15) comprise at least one channel (14) running essentially along the outer envelope surface of the safety liner (3). The method comprises using the high-pressure press without liner replacement until a fracture has occurred on the thin safety liner.Type: GrantFiled: September 5, 1996Date of Patent: June 16, 1998Assignee: Asea Brown Boveri ABInventors: Mats Gardin, Carl Bergman
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Patent number: 5658610Abstract: A method and device for high-pressure treatment of liquid substances, for example foodstuffs. The substance undergoes a cyclic process whereby a limited amount of the substance during each cycle is pressurized in a pressure intensifier (1) to a predetermined pressure and is then maintained at this pressure for a predetermined period of time. After the substance has been pressurized in the pressure intensifier (1), it is conducted to a pressure chamber (10) while maintaining the predetermined pressure. The substance is further caused to reside in the pressure chamber (10) for the predetermined period of time by being caused to pass over a predetermined distance between an inlet (9a) and an outlet (9b), which are arranged in the pressure chamber (10).Type: GrantFiled: September 22, 1995Date of Patent: August 19, 1997Assignee: ASEA Brown Boveri ABInventors: Carl Bergman, Jan Westerlund
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Patent number: 5622105Abstract: A high-pressure press is provided with a high-pressure chamber and an end member located at one end of the high-pressure chamber which serves as a packing holder. The end member is provided with a support surface which, under maximum pressure condition in the high-pressure chamber, faces an opposite end surface on the low-pressure cylinder which serves as a stationary part of the press. In this way, forces acting in a direction from the high-pressure chamber are transmitted to the stationary part when the support surface on the end member is brought into contact with the supporting end surface on the low-pressure cylinder.Type: GrantFiled: September 19, 1995Date of Patent: April 22, 1997Assignee: Asea Brown Boveri ABInventor: Carl Bergman
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Patent number: 5579682Abstract: A device for high-pressure treatment, in particular of liquid substances which contain components with a consistency different from that of the liquid. The device comprises a cylinder member (1), two end members (2, 3), a high-pressure piston (4), two high-pressure seals (8, 9) and connection means comprising channels and valve members to conduct the substance to and from the cylinder member (1). When the substance is pressurized, the cylinder member (1), at least one of the end members (3), the high-pressure piston (4) and the two high-pressure seals (8, 9) delimit a high-pressure chamber (10). The connection means are arranged outside the high-pressure chamber and preferably in respective end members (2, 3).Type: GrantFiled: November 27, 1995Date of Patent: December 3, 1996Assignee: Asea Brown Boveri ABInventors: Carl Bergman, Bertil Malmberg
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Patent number: 5370043Abstract: A high-pressure press, preferably for treatment of foodstuffs by high-pressure, comprising a cylinder element (20), provided in a vessel volume (4) of a pressure vessel (1), with a movable piston (24). The cylinder element is arranged with a gap (21) in relation to the surrounding pressure vessel wall (8), such that the same pressure prevails inside the cylinder element as outside thereof.Type: GrantFiled: October 29, 1993Date of Patent: December 6, 1994Assignee: Asea Brown Boveri ABInventors: Anders Traff, Carl Bergman
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Patent number: 5171515Abstract: A process for inhibiting corrosion caused by the presence of coolant water passing through a pressurized water nuclear reactor by the addition of an effective amount of an aqueous solution of zinc borate to the reactor coolant water. The transport of corrosion products and radioactive cobalt ions through the reactor primary circuit, as well as levels of radioactivity within the primary circuit, are reduced.Type: GrantFiled: February 7, 1992Date of Patent: December 15, 1992Assignee: Westinghouse Electric Corp.Inventors: Armand J. Panson, Carl A. Bergman
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Patent number: 5123832Abstract: The invention relates to a device for cooling of the furnace chamber (4) in a hot isostatic press by means of devices (7, 8) for circulation of a coolant in the furnace chamber (4), the coolant having a temperature which is lower, but not considerably lower, than the temperature of the articles.Type: GrantFiled: September 27, 1991Date of Patent: June 23, 1992Assignee: Asea Brown Boveri ABInventors: Carl Bergman, Lars Ohlsson
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Patent number: 5118289Abstract: A hot-isostatic press adapted for rapid cooling of the hot zone after completed pressing and sintering of the material includes a pressure vessel, end closures, and a hot zone surrounded by thermal barriers. Between the thermal barriers and the pressure vessel with end closures there are colder spaces. At least one connection, located in the lower part of the thermal barrier and provided with a valve between the space next to the pressure vessel and the space below the bottom thermal barrier, is provided with an externally controllable valve. In the upper part of the thermal barrier there is an opening with a relatively large cross section and a valve is provided for the opening, which comprises a heat-insulated portion.Type: GrantFiled: January 11, 1991Date of Patent: June 2, 1992Assignee: Asea Brown Bovari ABInventors: Carl Bergman, Lars Ohlsson
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Patent number: 4765166Abstract: A press for shaping a sheet metal blank in a cavity with a forming tool which determines the shape of the finished product. The sheet is pressed against the tool by a diaphragm which is influenced by a pressure medium on the side facing away from the cavity. The forming tool consists of an inexpensive casting material supported in a cup-shaped container. The space between the bottom and sides of the container and the bottom and sides of the cavity is filled with an elastic material.Type: GrantFiled: June 15, 1987Date of Patent: August 23, 1988Assignee: ASEA AktiebolagInventors: Carl Bergman, Lennart Svensson
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Patent number: 4598573Abstract: A press is adapted for the press tool it is to operate, by means of at least one pad of force-transmitting material formed in situ on a surface adapted to transmit the forming force to the press tool. The pad is formed by locating a tool substitute in the space intended for the tool, defining at least one volume between the tool substitute and the said surface adapted to transmit the forming force with a sealing means and injecting the pad forming material in liquid state into the said volume to allow the same to harden there preferably under a force equivalent to that which will be used in forming a blank when the substitute tool is replaced by the press tool.Type: GrantFiled: May 24, 1985Date of Patent: July 8, 1986Assignee: ASEA AktiebolagInventors: Carl Bergman, Goran Holmstrom, Arne Nygard
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Patent number: 4416722Abstract: A sheet stack is bound by applying adhesive with a drum from which adhesive is wiped just before the stack arrives to prevent excess adhesive on its front edge. Other features include a sheet-aligning jog table that moves out of position before the stack reaches the drum, the use of separators between a plurality of stacks that travel past the drum simultaneously, and a bound stack of sheets with a cover having a small, folded-over portion adjacent to the stack.Type: GrantFiled: May 17, 1982Date of Patent: November 22, 1983Assignee: Standard Duplicating Machines Corp.Inventors: Carl A. Bergman, Roy L. Thomas, Richard A. Bourbeau
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Patent number: 4395036Abstract: Apparatus for holding a stack of sheets for entry into a sheet feeder, wherein there is provided a tray for vertically supporting the stack, left and right guide elements moveable toward and away from the lateral edges of the stack for centering the stack in the tray, and a flexible band formed in a loop, the band being attached to the guide elements at two locations, such that the guide elements move inward and outward laterally in unison, and the band being supported beneath the tray, and wherein the band is bent (e.g., around a convex surface) during inward movement of the guide elements so that when the movement stops the band tends to move the guide elements outwardly as it assumes an equilibrium position, thereby preventing overtightening of the guide elements against the stack.Type: GrantFiled: December 7, 1981Date of Patent: July 26, 1983Assignee: Standard Duplicating Machines CorporationInventors: Carl A. Bergman, Roy L. Thomas, Richard A. Bourbeau
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Patent number: 4394009Abstract: Apparatus for feeding single sheets of paper from a stack of the sheets, including fixed upper and lower guide surfaces between which the sheets travel during feeding, a single, centrally-located feed roll, a registration roll downstream of the feed roll, the registration roll being activated at the end of a predetermined delay period beginning when the feed roll is activated, the delay period being sufficient to assure that a single sheet is moved into engagement with the registration roll before the end of the period, the separation between the upper and lower guide surfaces being greater at a location intermediate the separation and registration rolls than at the rolls to define a buckle-restraint region intermediate the rolls wherein buckling of the sheet occurs after engagement with the registration roll and before the end of the delay period, and the moving feed surface of the feed roll being adapted to slip with respect to the sheet after the sheet has buckled against the surface of the region.Type: GrantFiled: December 7, 1981Date of Patent: July 19, 1983Assignee: Standard Duplicating Machines CorporationInventors: Carl A. Bergman, Roy L. Thomas, Richard A. Bourbeau