1
Karl Gaffal, DE, Hans Dieter Sturm, DE: Pump with hydrostatic bearing. Michael S Striker, November 16, 1971: US3620639 (24 worldwide citation)

The hydrostatic bearing of an impeller pump is lubricated by a part of the pumped liquid. An auxiliary internal screw pump, pumps an amount of liquid from the main pump outlet to the center of the gap between inner and outer bearing parts. Half the amount lubricates one half of the gap and is discha ...


2
Karl Gaffal: Pressure equalizing device for the electric motor of an encapsulated motor-pump assembly. Klein Schanzlin & Becker Aktiengesellschaft, Peter K Kontler, September 30, 1986: US04614482 (16 worldwide citation)

A submersible motor pump wherein the thermal barrier between the pump housing and the motor housing contains at least one bellows or at least one cylinder and piston unit storing a supply of liquid for admission into the motor housing so as to maintain the motor housing in filled condition. The cont ...


3
Herbert Diederich, Karl Gaffal, Hugo Scherzer: Submersible motor pump assembly. Klein Schanzlin & Becker Aktiengesellschaft, Kontler Grimes & Battersby, November 22, 1983: US04416586 (13 worldwide citation)

A submersible motor pump assembly has a motor which is installed at a level below the pump. The shaft which is driven by the motor and rotates the impeller or impellers of the pump is spacedly surrounded by a tubular member of a thermal barrier in the region between the upper end of the motor housin ...


4
Karl Gaffal: Floating-ring seal. KSB Aktiengesellschaft, Darby & Darby, May 21, 1996: US05518256 (7 worldwide citation)

The invention concerns a floating-ring seal in which the ring is disposed so that it can move freely inside an annular chamber. Of the four walls of the chamber enclosing the ring, two walls disposed at an angle to each other are stationary while the walls opposite them rotate at the speed of the dr ...


5
Karl Gaffal: Hydrostatic shaft seal. Klein Schanzlin & Becker Aktiengesellschaft, Peter K Kontler, March 27, 1979: US04146238 (7 worldwide citation)

A hydrostatic seal for the upright shaft of a coolant circulating pump in a nuclear reactor plant has a first sealing element which is affixed to the shaft and a second sealing element which is axially movably mounted in the pump housing and defines with the first sealing element an annular control ...


6
Karl Gaffal, Christian Klepp: System for sealing passages in the walls of glandless circulating pumps or the like. Klein Schanzlin & Becker Aktiengesellschaft, Kontler Grimes & Battersby, March 13, 1984: US04436950 (7 worldwide citation)

The passage in a wall which separates the interior of the housing of a glandless submersible motor pump from the surrounding atmosphere is normally sealed by an annular seat which is placed against the end face of a muff forming a detachable part of the wall, and by a temperature- and pressure-resis ...


7
Wolfangang Schneider, Josef Peters, Karl Gaffal: Motor-pump aggregate. Klein Schanzlin & Becker Aktiengesellschaft, Kontler Grimes & Battersby, October 4, 1983: US04407631 (5 worldwide citation)

A motor-pump aggregate whose pump is a glandless centrifugal pump and is intended for use in a nuclear reactor plant has hollow coaxial pump and motor shafts which are sealingly coupled to each other. To this end, the first end portion of the pump shaft extends into the adjacent first end portion of ...


8
Karl Gaffal, Frank Etzold: Assembly for lubricating thrust bearings of machines. Klein Schanzlin & Becker Aktiengesellschaft, Peter K Kontler, February 17, 1987: US04643593 (2 worldwide citation)

The rotor of a thrust bearing for the horizontal shaft of a centrifugal pump is installed in a housing which is mounted in an oil-containing vessel and has an inlet below and an outlet above the oil level. The peripheral surface of the rotor has a groove which receives a portion of an annular stator ...


9
Karl Gaffal, Rolf Martens, Peter Havekost: Pump construction. Michael J Striker, April 13, 1976: US03949971 (1 worldwide citation)

An outer tubular member is adapted to be connected at one end with the wall of a pressure vessel, such as a reactor, and an inner tubular member is rigidly connected with and extends coaxially through the outer tubular member. A portion of the inner tubular member extends beyond the outer tubular me ...


10
Frank Etzold, Karl Gaffal: Device for lubricating shaft bearing. Klein, Schanzlin &Amp Becker Aktiengesellschaft, SONG MIN, November 19, 1986: CN86102128

The invention relates to a bearing oil supply device. A bearing chamber 2 which is provided with a thrust disc 5 and a corresponding thrust bearing 9 is arranged in an oil tank 1. The central lines of the bearing chamber 2 and the oil tank 1 are not in the same height. A cirque 7 on the internal wal ...