Patents Assigned to Flygt AB
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Patent number: 5250863Abstract: The stator housing of an electric motor has its central, rotary axis offset from, and parallel with, the longitudinal axis of its enclosing casing. The housing and casing define a cooling liquid chamber therebetween which, due to the offset axes, define the chamber of different widths. A wall, of arcuate configuration is joined to the casing to render the chamber of uniform width thereabout and therealong, and to form a separate, lateral compartment for conduits for conducting cooling liquid into the chamber.Type: GrantFiled: August 10, 1992Date of Patent: October 5, 1993Assignee: ITT Flygt ABInventor: Bengt A. Brandt
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Patent number: 5237228Abstract: A submersible machine has an electrically driven rotating mixer. The electric motor and hydraulic part are connected by a rotary shaft. The shaft end opposite from the hydraulic part is resiliently supported in a stator casing which surrounds the motor.Type: GrantFiled: November 13, 1991Date of Patent: August 17, 1993Assignee: ITT Flygt ABInventor: Hjalmar Fries
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Patent number: 5221182Abstract: The vanes (6) of a pump housing (5) are designed with strongly back swept leading edges (7) as seen in the direction of the flow, the vanes (6) being given a bulb form in the outward direction.Type: GrantFiled: October 1, 1992Date of Patent: June 22, 1993Assignee: ITT Flygt ABInventor: Ulf Arbeus
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Patent number: 5181729Abstract: Two identical mechanical seals (6, 7) and (8, 9) respectively and an intermediate spring device (17) are arranged in a holder which is easily replaceable. The spring (17) is common for the two seals and is connected to sockets (13) and (14) respectively which anchor the rotating seal rings (6) and (8) respectively. The oil containment area (20) of the machine is connected to the area containing the spring (17).Type: GrantFiled: August 26, 1991Date of Patent: January 26, 1993Assignee: ITT Flygt ABInventors: Alf Forssberg, Boris Fredriksson
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Patent number: 5174652Abstract: A mixer (1) is provided with a cover (6) on its upside for diminishing the risk for air intake when the mixer operates near a liquid surface (10).Type: GrantFiled: September 24, 1991Date of Patent: December 29, 1992Assignee: ITT Flygt ABInventors: James Fischer, Tore Strandberg
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Patent number: 5161958Abstract: The pressure side of a submersible pump unit is provided with a valve device which during certain periods of operation opens a connection between the submersible pump and the pump station to obtain the necessary circulation of the waste water in the station. The opening and closing of the valve device is effected by a ball which is controlled by the submersible pump pressure.Type: GrantFiled: August 13, 1991Date of Patent: November 10, 1992Assignee: ITT Flygt ABInventor: Folke Landquist
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Patent number: 5145254Abstract: At the bottom of the tank there are provided supports (4), (5), while the under side of the mixer is provided with corresponding surfaces (6), (7) for receiving the supports. In order to prevent the reaction force from the propeller (2) from tilting the front end of the mixer upwards, at least one of the supports (5) is arranged at a level above the level of the propeller shaft.Type: GrantFiled: September 24, 1991Date of Patent: September 8, 1992Assignee: ITT Flygt ABInventor: Gunnar Hovstadius
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Patent number: 5141392Abstract: The driving shaft (3) of a pump impeller (4) is extended beyond the impeller and supports the mixer (5) at its end. In order to minimize the risk for extensive damage if the mixer should hit a solid body, the shaft (6) of the mixer is very slim and manufactured of an elastic material such as spring steel.Type: GrantFiled: February 21, 1991Date of Patent: August 25, 1992Assignee: ITT Flygt ABInventor: Peter Uvemo
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Patent number: 4981417Abstract: An impeller for pumps, turbines, fans, etc., of the closed type, having a number of vanes arranged between cover discs. In order to reduce the secondary flows within the impeller, the secants between the suction side of the vane and the cover discs are displaced with respect to the intersections at the pressure side of the vane. This impeller is rotationally non-symmetrical.Type: GrantFiled: August 8, 1989Date of Patent: January 1, 1991Assignee: Flygt ABInventor: Ulf Arbeus
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Patent number: 4965409Abstract: A cable (1) entering a submersible machine, such as an electrically driven pump, a turbine etc., is surrounded by a collar (3) of a rigid material, and the collar (3) is secured to the machine shell (2) by bolts (4). Two sockets (5) and (6) of an elastic material surround the cable (1), one of them mounted in the shell (2) and the other in the collar (3). A ring (8) of a rigid material is arranged between the two sockets (5) and (6). The collar (3), during mounting, is moved towards and into contact with the shell (2), thereby causing the sockets (5) and (6) to be compressed axially and expanded radially so that the cable (1) is secured and sealed.Type: GrantFiled: August 1, 1989Date of Patent: October 23, 1990Assignee: Flygt ABInventor: Helge Lindroos
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Patent number: 4948342Abstract: The pressure side of the pump unit is provided with a valve (6) which during certain periods opens a connection between the pump and the pump station to obtain circulation in the station. The valve (6) is opened and closed by a valve ball (9) which is controlled by the pump pressure.Type: GrantFiled: November 29, 1989Date of Patent: August 14, 1990Assignee: Flygt ABInventor: Folke Landquist
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Patent number: 4925375Abstract: A device is provided for obtaining automatic circulation in waste water pump stations. At the pressure side of the pump unit, there is a valve which opens during certain times to form a connection between the pump and the pump station to create a circulation. The valve is opened and closed by means of communicating bellows which are controlled by the pressure difference between two sections in the valve having different areas.Type: GrantFiled: June 22, 1989Date of Patent: May 15, 1990Assignee: Flygt ABInventor: Valdemar Carlsson
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Patent number: 4801244Abstract: A device in a submersible pump or mixer prevents solid bodies from entering a housing containing a mechanical seal. The device has a helically formed groove so directed, that pollutant material is fed in a direction away from the mechanical seal, and the device has a cutting means to cut the pollutant material.Type: GrantFiled: June 4, 1987Date of Patent: January 31, 1989Assignee: Flygt ABInventor: Peter Stahl
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Patent number: 4771699Abstract: A device for transport of a cable in vertical shafts, in which the cable is attached to a number of sliding means at regular intervals and arranged to slide or roll along a vertical guiding rail. The sliding means are also rigidly attached to a lifting wire at regular intervals.Type: GrantFiled: March 31, 1987Date of Patent: September 20, 1988Assignee: ITT Flygt ABInventor: Guido Kaiserfeldt
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Patent number: 4749335Abstract: A rotary joint having a non rotary housing surrounding a rotating shaft and being sealed by a mechanical seal. Monitoring impulses are transmitted by hydraulic fluid which is transported between the housing and the shaft by means of a distribution socket. The socket is arranged so that a number of column seals are formed between the shaft and the socket. The apparatus is supported by two prestressed, reversed roller bearings.Type: GrantFiled: October 16, 1987Date of Patent: June 7, 1988Assignee: Flygt ABInventors: Bengt A. Brandt, Bertil Englesson
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Patent number: 4721392Abstract: A method and a device for installation of a mixer in a liquid tank is provided wherein the mixer is brought downwards into the tank along a guide which is pivotally attached in the upper part of the tank. During operation the reaction force from the impeller will cause the guide to pivot making the mixer take support against the tank wall.Type: GrantFiled: April 3, 1986Date of Patent: January 26, 1988Assignee: Flygt ABInventors: Hjalmar Fries, Roland Narholm, Bengt Thomaeus
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Patent number: 4711199Abstract: A device and a plant for breeding fish, shellfish, etc. includes one or several tanks of a non-rigid material which are lowered into the water. Each tank has at least one inlet and at least one outlet for water. The inlet and the outlet are so arranged that the water level in the tank is somewhat above the surrounding level to maintain the walls of the tank in a tightened out position by the higher static pressure in the tank.Type: GrantFiled: August 21, 1986Date of Patent: December 8, 1987Assignee: Flygt ABInventor: Lars-Erik Nyman
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Patent number: D294030Type: GrantFiled: March 4, 1985Date of Patent: February 2, 1988Assignee: Flygt ABInventors: Andrzej Lichtarowicz, Tom F. Roylance, M. Robert Sinclair, Guido Kaiserfeld
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Patent number: D306033Type: GrantFiled: November 2, 1987Date of Patent: February 13, 1990Assignee: Flygt ABInventors: Hjalmar Fries, Ingvar Karlsson
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Patent number: D341608Type: GrantFiled: October 9, 1992Date of Patent: November 23, 1993Assignee: ITT Flygt ABInventor: Hjalmar Fries