Patents by Inventor Rudolf P. Fritsch

Rudolf P. Fritsch 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).

  • Patent number: 5020916
    Abstract: Apparatus for the continuous processing, such as mixing, homogenizing, gassing and degassing, polymerizing of liquids, emulsions, suspensions, viscous substances and similar materials, is designed with several shafts (1) arranged vertically in ring fashion, with parallel axes and driven in equal direction. Each shaft carries a number of disk-shaped processing elements (13-15) arranged axially staggered in parallel planes, meshing with elements on adjacent shafts, and enclosing together with the shafts at least one central cavity or chamber (16) in whose area the processing elements are arranged in such a way that their circumferential surfaces are exposed. The material is efficiently mixed and homogenized while being handled gently and evenly, and local shearing stress leading to temperature peaks in the material is avoided by leaving the surfaces (130, 140) of the processing elements exposed on the outside, i.e. on the side facing away from the chamber (16).
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: June 4, 1991
    Inventor: Rudolf P. Fritsch
  • Patent number: 4773654
    Abstract: A shaft seal assembly for an apparatus for continuous processing of very viscous media, in particular for producing high molecular weight polymers, having parallel shafts (1) carrying at least two cooperating processing tools (3), with which shafts feed and removal devices for the product to be processed and one reaction chamber (4), which can be subjected to a vacuum, are associated, has sealing means having at least one slide ring seal (46, 55), by which means the reaction chamber is sealed off, in the vicinity of the shaft ducting devices, from a confining-liquid chamber (11) located on the outside and surrounding the shaft ends, which chamber contains confining liquid.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: September 27, 1988
    Inventor: Rudolf P. Fritsch
  • Patent number: 4749350
    Abstract: An injection molding system for processing thermoplastics and thermosetting plastics has at least one injection unit (1), which is axially movably supported on a support frame and is coupled to positioning means (15) generating the axial movement, and also has at least one turntable (2) supporting a plurality of injection molds (8) disposed in a ring. The turntable is supported on a movable cart (23) such that it is rotatable about a vertical axis (9). The injection unit is provided with axially movably supported rails (19), which have devices for releasable coupling to a mold carrier (28), carrying the particular mold (8), of the turntable (2) and are connected to clamping means (20, 21).
    Type: Grant
    Filed: September 10, 1987
    Date of Patent: June 7, 1988
    Inventor: Rudolf P. Fritsch
  • Patent number: 4686088
    Abstract: An apparatus for the production of long-chain polymers, especially polyesters, is designed with several shafts arranged vertically in ring fashion inside a common housing, with parallel axes and driven in equal direction, each of which carries a number of disk-shaped processing elements arranged axially in a row and in parallel planes, with which adjacent shafts mesh, leaving narrow gaps of predetermined width. These processing elements together with the shafts enclose at least one cavity that is under negative pressure and in whose area the processing elements are arranged in such a way that their circumferential surfaces are exposed.
    Type: Grant
    Filed: April 8, 1986
    Date of Patent: August 11, 1987
    Inventor: Rudolf P. Fritsch
  • Patent number: 4591487
    Abstract: Apparatus for the continuous production of high molecular polymers in which a plurality of parallel screw shafts coupled together for rotary movement in the same direction within a casing are partially disposed in trough-like recesses in the casing wall and enclose a devolatilization chamber having an opening for connection to a vacuum and forming an extrusion unit with the casing and in which the shafts carry spaced noncircular kneading disks oriented in staggered relationship on the shaft axes with the disks of adjacent shafts meshing to scrape the substance to be treated from each other.
    Type: Grant
    Filed: August 10, 1983
    Date of Patent: May 27, 1986
    Inventor: Rudolf P. Fritsch
  • Patent number: 4586219
    Abstract: Torque-splitting pinion gear for twin-screw machines comprising a first, direct-driven screw shaft, which has an output pinion meshing with a drive pinion provided on a coupling shaft, and also comprising a drive pinion provided on the second screw shaft, this pinion being axially offset towards the front relative to the output pinion of the first screw shaft and being drivable via an output pinion of the coupling shaft.
    Type: Grant
    Filed: January 20, 1983
    Date of Patent: May 6, 1986
    Inventors: Josef A. Blach, Rudolf P. Fritsch
  • Patent number: 4546929
    Abstract: An essentially cylindrical comminuting tool has axially extending cutter bars (8, 8a) having cutting edges (9) at the outer circumference thereof; the cutter bars are located in uniformly distributed position on the circumference of the tool and clamped therein by clamping elements (2, 2a) which are radially moved inwardly, to pull the cutter bars in tightly clamped position, by conical surfaces (18) formed on inwardly projecting portions (16) which engage with conical surfaces formed on clamping disks (19). The clamping disks (19) are drawn together by tension bolts (23). For simple assembly of the cutter bars, two clamping elements (2a) can be joined together into a U-shaped structure (FIG. 4), or all the clamping elements can be assembled in a ring-like structure (FIG. 5). The clamping elements preferably have angled, shallow V-shaped clamping surfaces (5a, 6a) which match similar clamping surfaces (5, 6) on the cutter bars.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: October 15, 1985
    Inventors: Rudolf P. Fritsch, Hans Hench