Patents Represented by Attorney Cyrus S. Hapgood

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  • Device for opening and closing the outlet of a worm conveyor
    Patent number: 4322021
    Abstract: At its outlet end, a rotary feed screw coacts with a control element which, in a first position relative to the screw, closes a delivery conduit. To effect a dispensing operation, the control element is moved to a second position relative to the screw to form therewith a discharge opening through the delivery conduit, the dispensing being effected by rotating the screw and said opening together to maintain said opening. When the dispensing is to be stopped, the control element is returned to its first position relative to the screw.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: March 30, 1982
    Assignee: Alfa-Laval AB
    Inventor: Rolf Olsson
  • Method and apparatus for making ice blocks
    Patent number: 4315410
    Abstract: Flexible pipes unwound from a supply drum are placed adjacent a wall to be supported, and water is applied to the outside of the pipes while passing through them a cooling medium at a temperature below the melting point of ice, thereby freezing a first ice layer against the wall. Cooling medium at a temperature above the ice melting point is then passed through the pipes to loosen them from the ice; and at least some of the pipes are rewound on the drum to remove them from the first ice layer and are then replaced outside but adjacent thereto, after which the procedure is repeated until enough ice layers are formed to provide a block of desired thickness.
    Type: Grant
    Filed: May 12, 1980
    Date of Patent: February 16, 1982
    Assignee: Stal Refrigeration AB
    Inventor: Ivar Brandin
  • Milk receptacle with discharge valve
    Patent number: 4314526
    Abstract: A milk receptacle is provided at the top with an air outlet and at the bottom with a milk outlet controlled by a float-actuated valve comprising an annular disc engageable with an eccentrically disposed valve seat. The disc is connected at its center to the float and is tiltable in a vertical plane against the valve seat as the float rises, thus ensuring gradual opening of the valve by a small opening force.
    Type: Grant
    Filed: October 17, 1980
    Date of Patent: February 9, 1982
    Assignee: Alfa-Laval AB
    Inventor: Kjell Nordenskjold
  • Milking plant
    Patent number: 4313396
    Abstract: A milking plant of the kind operating at two different vacuum levels is provided with a vacuum source producing a low vacuum, and an ejector connected to the vacuum source and producing a high vacuum.
    Type: Grant
    Filed: May 21, 1980
    Date of Patent: February 2, 1982
    Assignee: Alfa-Laval AB
    Inventor: Hans K. Olofsson
  • Cheese-draining apparatus
    Patent number: 4311087
    Abstract: Multi-cavity molds coact with respective table elements forming a drainage table. Between each mold and the corresponding table element is a connecting means allowing the mold to slide between a normal cheese-draining position against the table element and a cleaning position spaced from the table element. The connecting means include abutments limiting said sliding of the mold and on which the mold is supported in said cleaning position thereof.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: January 19, 1982
    Assignee: Alfa-Laval S.A.
    Inventor: Gerrit E. Brinkman
  • Centrifuge
    Patent number: 4311270
    Abstract: In a centrifugal separator for separating mixtures into at least two fractions, especially one liquid fraction and one solid phase fraction, where there are permanently open outlets from the rotor for the fractions, there is a need for an automatic control of the flow of at least one of the fractions, especially the solid phase fraction. The invention provides in the outlet a vortex fluidic device which is of a type that does not separate the incoming mixture but which controls the flow by increasing same when the viscosity of the flow increases and vice versa. Thus, there is provided an automatic flow control; and there is a restriction of the flow without reduction of the flow area, which is important for the discharge of the solid phase fraction flow in this type of centrifugal separator.
    Type: Grant
    Filed: January 9, 1980
    Date of Patent: January 19, 1982
    Assignee: Alfa-Laval AB
    Inventor: Oscar G. Hovstadius
  • Plate heat exchanger
    Patent number: 4307779
    Abstract: In a plate heat exchanger, in which the plates are provided with a turbulence generating pattern of grooves and ridges which also form supporting points for plates disposed adjacent to each other, the thermal treatment of a medium will be different in different parts of one and the same passage due to the different length of different flow paths within the passage. In order to equalize the differences of thermal treatment within one and the same passage and/or to provide mutually different treatment of the heat exchanging media, each passage is formed by plates corrugated in a pattern which is unsymmetrical with regard to the central plane of the plates, the ridges and grooves of plates disposed adjacent to each other extending in mutually different directions relative to the longitudinal axis of the plates.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: December 29, 1981
    Assignee: Alfa-Laval AB
    Inventors: Hans Johansson, Kaj Rissler, Dag Rynell, Malte Skoog, Nils Stadmark
  • Plate heat exchanger
    Patent number: 4303123
    Abstract: In a plate heat exchanger in which the flow rates of the two heat exchanging fluids are different, it is possible to obtain an adjustment to differing proportions of the fluid flows, the pressure drops being given. To this end, the heat exchanger is provided with at least two sections of heat exchanging passages, in at least one of said sections the passages for the two respective fluids having essentially different flow resistances. Furthermore, the proportion of the flow resistances of the passages for the respective fluids in one section differs essentially from the corresponding proportion in at least one other section.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: December 1, 1981
    Assignee: Alfa-Laval AB
    Inventor: Malte Skoog
  • Plate heat exchanger
    Patent number: 4301864
    Abstract: In a plate heat exchanger having a large number of heat exchanging passages connected in parallel, the distribution of the flow between the passages will be unequal in that a larger flow passes through passages which are close to the inlets and outlets than through passages far away therefrom. To eliminate this problem, the passages are provided with means for regulating the flow resistance, said means being arranged so that passages which are situated farther away from the inlets and outlets have lower flow resistance than passages closer to said inlets and outlets.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: November 24, 1981
    Assignee: Alfa-Laval AB
    Inventors: Toivelemb Kivikas, Kaj Rissler, Dag Rynell, Malte Skoog
  • Method for producing pulp
    Patent number: 4302281
    Abstract: In the production of pulp, the amount of ballast in the white liquor is reduced by maintaining the concentration of the green liquor, prior to causticizing thereof to convert it to the white liquor used for cooking the wood, at a level of 110.+-.20 grams per liter total titratable alkali counted as NaOH, maintaining the efficiency of the causticizing operation at 92.+-.3%, and concentrating the white liquor, prior to the cooking, by evaporation to a content of 130-200 grams per liter efficient alkali counted as NaOH.
    Type: Grant
    Filed: August 28, 1979
    Date of Patent: November 24, 1981
    Assignee: AB Rosenblads Patenter
    Inventor: Rolf Ryham
  • Production of ethanol
    Patent number: 4287303
    Abstract: In the production of ethanol in plants, comprising a fermenter, a centrifugal separator for the recirculation of the yeast to the fermenter and a plant for the separation of a yeast-free flow, coming from the centrifugal separator, into one flow, rich in ethanol, and into one residual flow, the substrate, that is fed to the fermenter must be rid of solid substance, like fibres etc. In the separation of such solid substance a certain amount of substrate has been lost according to the methods utilized hitherto, or an unnecessarily high consumption of water and energy has occurred. According to the invention the solid substance, which is separated from the raw material flow, is washed, preferably countercurrently with said residual flow, which in turn, enriched in substrate, is fed to the fermenter. If a distillative method is used for said separation the residual flow is called slop.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: September 1, 1981
    Assignee: Alfa-Laval AB
    Inventors: Bengt I. Dahlberg, Lars K. J. Ehnstrom, Carroll R. Keim
  • Method for separation of material mixtures, containing abrasive particles, in a hydrocyclone separator
    Patent number: 4278534
    Abstract: A method is disclosed, intended for usage with double-mantled hydrocyclone separators of the type which is preferably used in the pulp and paper industry for purification of cellulose fiber suspensions, containing abrasive particles, which may, in the long run, cut a hole in the conical part of the hydrocyclone separator. According to the method, the operation of the hydrocyclone separators is continued also after the moment, when a hole has been formed in the conical part of the hydrocyclone separators. It has become apparent, that no deterioration of the separation ability is observed.
    Type: Grant
    Filed: November 16, 1979
    Date of Patent: July 14, 1981
    Assignee: AB Celleco
    Inventor: Karl F. O. Jakobson
  • Valve
    Patent number: 4271860
    Abstract: A valve has a pressure chamber within its housing for remote operation. A stem in the housing has axial passages for power fluid and for cleaning liquid. The valve member is a sleeve, biased closed, which engages a movable seat which is resiliently supported. Leakage around the seals between the sleeve and the stem and between the sleeve and the housing is received in chambers and drained away from the housing to prevent mixing of the cleaning liquid and the processing liquids.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: June 9, 1981
    Assignee: Alfa-Laval AB
    Inventor: Erik H. O. Jeppsson
  • Milk claw
    Patent number: 4253419
    Abstract: A milk claw includes upper and lower body portions forming a milk collecting chamber having a central vertical axis. Four inlet nozzles slant downwardly to said upper body portion while extending tangentially in one direction relative to said axis, whereby milk from these nozzles is caused to spin in said one direction about said axis as the milk descends in a spiral path in said chamber. A discharge nozzle opens into the lower part of the chamber at a region located in the spiral path of the spinning milk and discharges the milk tangentially from the chamber in the direction of said spin.
    Type: Grant
    Filed: May 24, 1979
    Date of Patent: March 3, 1981
    Assignee: The De Laval Separator Company
    Inventor: Denis C. Yang
  • Centrifuge with horizontally journalled rotor
    Patent number: 4251023
    Abstract: A horizontally journalled centrifugal rotor has support bearings at its opposite end portions resting on the bottoms of notches in respective end wall elements of a frame which also includes longitudinal elements extending on each side of the rotor and fixing the end wall elements relative to each other along their entire side edges, the support bearings having flanges parallel with the end wall elements and coacting therewith to fix the support bearings against endwise movement relative to the frame. The upper edges of the end wall elements, the longitudinal elements and the bearing flanges form together an endless contact surface disposed in a single plane and in sealing engagement with a similar contact surface of a top cover for the frame.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: February 17, 1981
    Assignee: Alfa-Laval Separation A/S
    Inventors: Per Hohne, Andreas Kontarinis, Siegfried Titel
  • Rotary compressor with valved liquid injection through the rotor
    Patent number: 4239467
    Abstract: In a rotary compressor of the sliding vane type, the vanes maintain sliding contact with the inner wall of the housing while moving periodically inward and outward in generally radial slots in the cylindrical rotor, which is provided with conduits for injecting oil or other liquid into the working chambers formed by the rotor, the vanes and the housing's inner wall. The housing has inlet ports for a gas to be compressed in the working chambers and has outlet ports for the compressed gas. Valves are provided to open and close said rotor conduits in synchronism with said periodic moving of the vanes, whereby the liquid is injected into the working chambers only during such periods when these chambers are closed to the gas inlet and outlet ports.
    Type: Grant
    Filed: October 12, 1978
    Date of Patent: December 16, 1980
    Assignee: Stal Refrigeration AB
    Inventor: Rune V. Glanvall
  • Apparatus for degassing paper stock
    Patent number: 4238208
    Abstract: The paper-making stock is fed continuously to a tank with two chambers separated by a partition having an opening for passage of stock from the first to the second chamber, evacuation means being provided for maintaining equally low gas pressures in the two chambers. A stock consumer is connected to a stock outlet of the first chamber, and stock from an outlet of the second chamber is returned to the tank via a recycle line. Means for sensing the stock level in the first chamber are provided to control valve means in the recycle line, whereby said stock level is maintained constant.
    Type: Grant
    Filed: November 22, 1978
    Date of Patent: December 9, 1980
    Assignee: AB Celleco
    Inventors: Rune H. Frykhult, Hans O. G. Forsblom
  • Milking machine claw
    Patent number: 4231323
    Abstract: An outlet from the claw housing is controlled by a valve which allows a small discharge flow even in its closed position. The valve is operated by a pneumatic member comprising two flexible diaphragms defining between them a working chamber, the diaphragms having unequal areas and being exposed outside the working chamber to the pressure in the milk manifold of the claw. Thus, the valve operating member is actuated by changes in the difference between the pressures in the manifold and the working chamber.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: November 4, 1980
    Assignee: Alfa-Laval AB
    Inventor: Karl E. Olander
  • Refrigeration system
    Patent number: 4229949
    Abstract: A compressor, a condenser, an expansion valve and an evaporator are interconnected in a refrigeration circuit, the evaporator discharging the refrigerant toward the compressor as a two-phase flow which is a mixture of liquid particles and superheated vapor. A flow disturbing element is located in the circuit downstream from the evaporator and operates to give the two flowing phases an increased mutual relative speed.
    Type: Grant
    Filed: January 31, 1979
    Date of Patent: October 28, 1980
    Assignee: Stal Refrigeration AB
    Inventor: Tore Brandin
  • Bearing arrangement for shaft of rotary compressor
    Patent number: 4227755
    Abstract: A slide bearing journals the rotor shaft in the compressor housing with a clearance radially of the shaft; and an anti-friction bearing mounted on the shaft journals it axially thereof, the housing having a fixed support surface against which the anti-friction bearing abuts axially in one direction and which allows radial movement thereof. Yielding means are provided to press the anti-friction bearing against the support surface with a predetermined precise force.
    Type: Grant
    Filed: October 19, 1978
    Date of Patent: October 14, 1980
    Assignee: Stal Refrigeration AB
    Inventor: Anders Lundberg