| Patent Number |
Title Of Patent |
Date Issued |
| 4995790 |
Vertical barrel pump |
February 26, 1991 |
| A vertical barrel pump wherein the barrel casing is not provided with an integral flange. The flange is a separately produced part whose upper side is engaged by an external shoulder of the barrel before the pump housing is mounted in and is attached to the barrel by way of the flange. T |
| 4834559 |
Multiple-face radial plain bearing |
May 30, 1989 |
| The bearing shell of a multiple-face hydrodynamic radial plain bearing has an internal surface which is composed of several identical arcuate sections whose radii of curvature slightly exceed the radius of curvature of the rotary component within the shell. The central portion of each |
| 4828457 |
Elbow casing for fluid flow machines |
May 9, 1989 |
| A casing which admits the fluid medium into the range of the impeller or first impeller in a fluid flow machine, particularly in a centrifugal pump, is made of several sections which have abutting surfaces. At least one such surface has a recess forming part of a fluid flow passage, and |
| 4806078 |
Device for transmitting torque to brittle impellers of fluid flow machines |
February 21, 1989 |
| A centrifugal pump wherein the back shroud of a brittle impeller of ceramic or glass is coupled to the radially outwardly extending disc of a metallic adapter whose hub receives torque from the pump shaft. The adapter has a flange which surrounds the peripheral surface of the impeller or |
| 4799857 |
Casing for fluid flow machines |
January 24, 1989 |
| A fluid flow machine, particularly a centrifugal pump, wherein the casing has a tubular first portion serving to convey a stream of fluid radially toward a pump shaft which drives one or more impellers. The casing has a second portion with an arcuate band-like wall which spacedly surroun |
| 4792119 |
Valve |
December 20, 1988 |
| A valve wherein the housing has an internal seat having a sealing face which surrounds a seat area that is inclined with reference to the axis of a stem for the valving element. The sealing face is tapered and forms part of a conical surface. In order to ensure that the valving element i |
| 4778314 |
Method of machining grooves in shafts and like workpieces |
October 18, 1988 |
| A method of machining an axially parallel groove in the periphery of a shaft includes fixedly mounting the shaft in the main spindle of a CNC turning machine, moving a rotating milling tool (whose diameter decreases in a direction from its free end and whose maximum diameter is less than |
| 4775297 |
Non-clogging impeller for use in axial and mixed-flow centrifugal pumps |
October 4, 1988 |
| The vane of the impeller in a high-speed or mixed-flow centrifugal pump for the conveying of liquids which contain high or low concentrations of strands or strips of vegetable, plastic or other material has a convex inlet edge whose curvature increases gradually in a direction radially |
| 4775295 |
Centrifugal pump casing |
October 4, 1988 |
| The subject of the invention is a casing jacket for centrifugal pumps in which the suction side connecting flange is integrated in the casing jacket and the actual suction nozzle is located inside the casing jacket. A high degree of pressure resistance is obtained by embossed, corrug |
| 4753571 |
Liquefied gas pump |
June 28, 1988 |
| A liquefied gas pump wherein a vessel contains a supply of liquefied gas which is pumped from its inlet to its outlet by a multi-stage upright centrifugal pump whose first stage is immersed in the supply of liquefied gas in the vessel. The shaft seal at the upper end of the pump housing |
| 4752187 |
Radial impeller for fluid flow machines |
June 21, 1988 |
| A radial impeller for use in centrifugal pumps wherein a reduction of the outer diameter entails a change in the total head but does not affect the capacity because the front coverplate of the impeller is inclined with reference to a plane that is normal to the impeller axis. The inclina |
| 4720248 |
Thermal barrier for submersible pump and motor assemblies |
January 19, 1988 |
| A thermal barrier which is interposed between the casing of a pump and the housing of a motor has a first section which resembles a spool and includes a first flange sealingly connected to the casing, a second flange sealingly connected to the housing and a hollow cylindrical core spaced |
| 4653721 |
Device for coupling the shank and the valving element of a shutoff valve to each other |
March 31, 1987 |
| The valving element of a valve has an axially projecting tubular extension with an open-ended socket for one end section of a shank which has a larger-diameter cylindrical portion in the deepmost portion of the socket, a smaller diameter cylindrical portion adjacent the open end of the |
| 4646579 |
Shaft seal assembly |
March 3, 1987 |
| A shaft seal assembly wherein the end portions of two coaxial shafts carry two components of a torque transmitting unit. One component is a disc which is eccentrically secured to the end portion of the respective shaft and extends into an eccentric circular recess of the other component |
| 4643593 |
Assembly for lubricating thrust bearings of machines |
February 17, 1987 |
| 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 a |
| 4614482 |
Pressure equalizing device for the electric motor of an encapsulated motor-pump assembly |
September 30, 1986 |
| 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 conditi |
| 4606547 |
Composite machine housing and seals therefor |
August 19, 1986 |
| Two components of the housing of a centrifugal pump have adjoining surfaces and define an opening for an annular insert which surrounds a rotary shaft. The insert is surrounded by a sealing ring which is biased into sealing engagement with the peripheral surface of the insert and against |
| 4599487 |
Cable gland |
July 8, 1986 |
| A gland which is installed in the hole of a wall between two different atmospheres to prevent the leakage of a fluid from the one side to the other side of the wall along the outer sheath of an electric cable has a tubular metallic housing which is sealingly installed in the hole and int |
| 4596510 |
Centrifugal pump for handling of liquid chlorine |
June 24, 1986 |
| A machine for pumping liquid chlorine employs an upright shaft sump pump which is confined in a hermetically sealed housing and has a tubular supporting element surrounding the pump shaft. The latter is mounted in overhung position and is adjacent to a pressure pipe which conveys the |
| 4596476 |
Lubricating system for shaft bearings |
June 24, 1986 |
| The thrust bearing for the shaft of a boiler feed pump in a nuclear reactor plant is cooled by a first stream of lubricant which is drawn from a sump by an impeller receiving motion from the shaft. The first stream constitutes one branch of a larger second stream which flows from the |
| 4572474 |
Mounting assembly for machines |
February 25, 1986 |
| An assembly for mounting a driven machine and drive includes a support frame on a foundation. The drive is secured to a set of mounting plates which are disposed directly on the support frame. The driven machine is carried by a set of mounting units each of which comprises a pair of |
| 4564334 |
Guide wheel for multistage centrifugal pumps |
January 14, 1986 |
| The follow-up guide wheels of a multistage centrifugal pump define flow paths whose cross-sectional area increases exclusively in the axial direction of the respective stages, or axially and radially inwardly, to thus allow for a reduction of the outer diameters of the guide wheels w |
| 4563801 |
Method of reinforcing the edges of impeller vanes or the like |
January 14, 1986 |
| The inlet and/or outlet edge of a blank which is to be converted into the vane of an impeller for use in a centrifugal pump is reinforced by providing an exposed surface of the blank with a pair of contiguous recesses which extend along the edge and the deeper of which is immediately |
| 4536128 |
Barrel housing for centrifugal fluid machines |
August 20, 1985 |
| The barrel housing of a multistage centrifugal pump has an elongated cylindrical main section and a discrete annular section which is inserted into one end portion and defines an annular shoulder facing the other end portion of the main section. The shoulder is engaged by the inner casin |
| 4518311 |
Centrifugal pump |
May 21, 1985 |
| A centrifugal pump has a casing with a cylindrical shell surrounding a volute-type inner section which is formed with a hollow radial extension for admission of fluid into a nipple of the shell. The extension forms part of or constitutes a separable sealing device between a passage of th |
| 4468176 |
Turbine driven pump |
August 28, 1984 |
| A turbine driven pump wherein a multi-stage centrifugal pump unit is coaxial with and mounted on a common shaft with a turbine unit. The two units are connected to each other by a low-pressure section which defines a hydrostatic seal between the interior of the pump unit and the interior |
| 4436950 |
System for sealing passages in the walls of glandless circulating pumps or the like |
March 13, 1984 |
| 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 |
| 4435126 |
Centrifugal pump impeller with replaceable wear ring |
March 6, 1984 |
| A centrifugal pump impeller, particularly for use in pumps for effecting forced circulation of contaminated fluids in the primary circuits of nuclear reactor plants, has an impeller body which is surrounded by a cylindrical wear ring. The wear ring has an exposed end face and a second |
| 4433947 |
Slurry feed pump for coal liquefaction reactors |
February 28, 1984 |
| A slurry feed pump which delivers a highly pressurized suspension of coal particles, coal oil and a catalyst to a liquefaction reactor is installed in a plenum chamber which is filled with pressurized coal oil and surrounds the pump housing. The suspension-supplying conduit sealingly |
| 4433825 |
Stress-resistant mount for the casing of a centrifugal pump |
February 28, 1984 |
| The casing of a centrifugal pump which is subjected to pronounced external stresses is secured to a foundation or to a base plate by one or more rings which surround the casing and receive stresses therefrom. Each ring has lugs which transmit the stresses to the support; one surface of e |
| 4416586 |
Submersible motor pump assembly |
November 22, 1983 |
| 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 |
| 4407631 |
Motor-pump aggregate |
October 4, 1983 |
| 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 en |
| 4406583 |
Centrifugal pump with double volute casing |
September 27, 1983 |
| A centrifugal pump comprises a casing which has two volutes disposed substantially diametrically opposite each other in such a way that the end of the first volute is adjacent to the start of the second volute. The outer diameter of the casing approximates or equals the diameter of the |
| 4386780 |
Apparatus for cleaning liquids in centrifugal pumps or the like |
June 7, 1983 |
| An apparatus which removes contaminants from the liquid in a centrifugal pump has a housing connected with the pump shaft and having a cleaning chamber connected with a first space containing contaminated liquid and a second chamber connected with a second space for cleaned liquid as wel |
| 4383800 |
Centrifugal pump with open double volute casing |
May 17, 1983 |
| The double volute casing of a centrifugal pump has a main portion which has first and second volutes extending along arcs of not more than 180 degrees. The outer diameter of the main portion equals or approximates the outer diameter of the end of the first volute, and such end is adjacen |
| 4372337 |
Rotary distributor valve |
February 8, 1983 |
| The housing of a distributor valve has a first inlet for admission of a liquid which is maintained at a first pressure, a second inlet for admission of a liquid which is maintained at a higher second pressure, and at least two outlets. The cylindrical valving element has a first passage, |
| 4334370 |
Method of transporting flowable media of changing consistencies |
June 15, 1982 |
| An arrangement for directly transporting manganese nodules obtained in ocean bottom mining, entrained in carrier water, to a ship includes a riser conduit and a submersible motor-pump arrangement located at the ocean bottom and discharging into the riser conduit in continuous operati |
| 4303249 |
Seal for a plate-shaped closure |
December 1, 1981 |
| A seal for closing a gap which is present between a tubular housing member and a plate-shaped closing member pivotally mounted within the housing member in the closing position of the closing member includes two resilient sealing lips which, even when unstressed, assume substantially |
| 4239462 |
Heat barrier for motor-pump aggregates |
December 16, 1980 |
| A spool-shaped metallic heat barrier is inserted between the motor housing and the pump housing of a motor-pump assembly which conveys fluids at elevated temperatures. The flanges of the heat barrier abut against and are connected to the respective housings by means of bolts, and are |
| 4227043 |
Sealing device for portions of electric cables in the holes of housings of electric motors or th |
October 7, 1980 |
| That part of the sheath of an electric cable which extends through a hole in the housing of a submersible pump motor is surrounded by a metallic sleeve having end portions of reduced diameter. Such end portions and the adjacent portions of the sheath are surrounded by and bonded to tubul |
| 4208169 |
Impeller for centrifugal pumps |
June 17, 1980 |
| A radial or semiaxial impeller for centrifugal pumps has an annulus of vanes whose inlet edges are disposed at the periphery of a circle and are bounded by convex transition surfaces having small radii of curvature. The inner portions of the suction sides of vanes are bounded by flat or |
| 4195655 |
Valve for regulating the flow of hot fluids |
April 1, 1980 |
| A ball valve for controlling the flow of hot fluids in nuclear reactor plants has a tubular body for a spherical valving element which is flanked by two axially movable seats and is turnable between open and closed positions. Discrete bellows are provided to move the seats away from the |
| 4177008 |
Centrifugal pump |
December 4, 1979 |
| A primary recirculating pump for pressurized water or boiling water nuclear reactors has a spherical housing with a radially extending integral outlet, a rotary impeller which is insertable or removable through a sealable opening of the housing, and a composite inlet including an outer |
| 4172690 |
Arrangement for centering the impellers in a multi-stage centrifugal pump |
October 30, 1979 |
| The casings, partitions and impellers of neighboring stages of a submersible motor pump consist of synthetic plastic material and are stacked in a cylindrical pump body consisting of metallic material. The shells of the casings are biased axially so that they bulge outwardly into fri |
| 4168936 |
Stuffing box |
September 25, 1979 |
| A stuffing box which prevents the escape of highly pressurized, hot, solids-containing and/or toxic fluid media from the housing of a centrifugal pump has a receptacle with a flange which is sealingly secured to the housing and with a cylindrical portion spacedly surrounding that par |
| 4154484 |
Apparatus for transporting fragments of ore or the like from a lower to a higher level in a liqu |
May 15, 1979 |
| Apparatus for transporting solid particles from an underground excavation to a level above the ground has a liquid-containing underground vessel which receives solid particles from a conveyor or from lorries and whose lower portion communicates with the receiving ends of two U-shaped pip |
| 4147465 |
Means for abruptly terminating the flow of fluid in closed fluid circuit systems of nuclear reac |
April 3, 1979 |
| A nuclear steam supply system wherein each of a plurality of centrifugal pumps begins to operate with full cavitation in response to an abrupt drop of system pressure in the event of leakage. This is achieved by influencing a net positive suction head of each pump over the entire range |
| 4146238 |
Hydrostatic shaft seal |
March 27, 1979 |
| 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 annu |
| 4136141 |
Method of cushioning commodities in containers with foamed in place cellular plastic material |
January 23, 1979 |
| A commodity to be packaged in a carton, box or another type of container is foamed in place while being held by distancing elements which extend into the interior of the container. The distancing elements are retracted upon completion of the foaming step, either through the open top or t |
| 4115029 |
Centrifugal pump |
September 19, 1978 |
| A primary recirculating pump for pressurized water or boiling water nuclear reactors has a spherical housing with a radially extending integral outlet, a rotary impeller which is insertable or removable through a sealable opening of the housing, and a composite inlet including an outer |
