Patents by Inventor Wilhelm Hegler

Wilhelm Hegler 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: 5976298
    Abstract: For the production of a multilayer pipe of thermoplastic material, in particular polyolefine, an extrusion equipment is provided, extruding at least one tube in a direction of production. A calibrating arrangement for forming a pipe of externally profiled shape is provided downstream of the extrusion equipment. The calibrating arrangement is followed by a preheater for heating to welding temperature the outer surfaces of the externally profiled shape. Furthermore, a coextruding head is provided, having an extruder for coextruding a tube around the pipe, the coextruding head having a partial vacuum connecting line for the tube and the outer surfaces to be welded together under the difference pressure between ambient pressure and partial vacuum.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: November 2, 1999
    Assignee: Ralph-Peter Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5953974
    Abstract: An apparatus for cutting slots in corrugated and twin-wall pipes that have annular elevations alternating with annular impressions, comprises a machine frame with a pipe duct and a lifting carriage for moving a pipe through the pipe duct. Two groups of holding and centering levers are provided which are engageable with a pipe for straightening and retaining the latter axially and radially. Further, saws are provided which are disposed between two groups of holding and centering levers on the machine frame and which are movable to reciprocate lineally and radially in relation to the axis of the pipe duct.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: September 21, 1999
    Assignee: Wilhelm Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5560941
    Abstract: An apparatus for the manufacture of corrugated pipes of thermoplastic plastics, which has circulating mold segment halves disposed in two opposite rows subsequent to an injection head, includes a wedge element for separating the mold segment halves. This wedge element is displaceable parallel to the direction of production. Further, grab equipments are provided to be displaceable,counter to the direction of production, by which one additional mold segment half at a time can be moved to the downstream end of a molding path, removed from the latter in the direction of production and moved into a parking position.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: October 1, 1996
    Assignee: Wilhelm Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5511964
    Abstract: An apparatus for the manufacturing of plastic pipes has half shells of which two at a time combine as a pair to form a mold. It is provided with a temperature-regulating bell. Supply lines are formed as flexible supply hoses of temperature-resistant plastic material. A line conduit accommodating them is provided with a protecting tube, which accommodates the supply hoses and which is provided with a heat insulation towards an injection head.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: April 30, 1996
    Assignee: Wilhelm Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5489403
    Abstract: In a method for connecting pipe pieces of corrugated pipes to form a pipe, which is to be used in particular as a protection pipe for communication cables or light wave guides, external pipe segments are formed by appropriate cutting in the vicinity of the external pipe portions, which external pipe segments are inserted into recesses of welding sleeves. These welding sleeves comprise an outer ring and an inner ring, the inner ring not projecting radially beyond the inner pipe portions into the pipe. At least one of the rings is welded with the external pipe segments.
    Type: Grant
    Filed: March 2, 1994
    Date of Patent: February 6, 1996
    Assignee: Wilhelm Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5472659
    Abstract: For the continuous manufacture of a compound pipe with a spigot which is substantially smooth on its outside, the compound pipe including a smooth internal tube and an external tube provided with transverse grooves and welded together with the internal tube, an external tube and an internal tube are extruded, the latter into the external tube. While the spigot which is substantially smooth on the outside is manufactured, its external wall is pressure-relieved by compensation chambers.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: December 5, 1995
    Assignee: Wilhelm Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5393211
    Abstract: An apparatus for the manufacture of pipes having transverse profile features has a machine bed, on which half shells, which can be combined to form a mold, are rotatably and displaceably drivable. The half shells are pressed together on a molding path by guide rails, of which one is displaceable at right angles to the direction of production by hydraulically actuatable drives. Interlockings may be provided in addition, a locking member of which engaging with an associated locking recess.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: February 28, 1995
    Assignee: Wilhelm Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5346384
    Abstract: An apparatus for the manufacturing of plastic pipes has an injection head and half shells of which two at a time combine as a pair to form a mold. The injection head has at least one channel issuing in a substantially ring-shaped nozzle, which is delimited by two components one of which being adjustable for modification of the width of the nozzle. A component directly delimiting the nozzle is tiltable in relation to the central longitudinal axis, whereby an adjustment of the width with great sensitivity is attained for such a ring-shaped nozzle.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: September 13, 1994
    Assignee: Wilhelm Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5320697
    Abstract: For welding composite pipes together a welding ring is used, which bears against the side wall portions of elevations. It consists of thermoplastic material and is provided with an electric resistance heating. Prior to welding there is an annular gap between the front walls of the pipes to which annular gap a volume compensating groove is associated in the welding ring. A connection of the pipes in their region outside of their inner pipe is performed by an at least partial welding of the welding ring, the front walls bearing against each other in unwelded manner.
    Type: Grant
    Filed: August 26, 1992
    Date of Patent: June 14, 1994
    Assignee: Wilhelm Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5320797
    Abstract: For the continuous manufacture of a compound pipe with a pipe socket including a smooth internal tube and an external tube provided with transverse grooves and welded together with the latter, an external tube and an internal tube are extruded, the latter into the external tube. While the normal compound pipe is manufactured, gas is blown at a slight overpressure into the space beteen the external tube and the internal tube. When the pipe socket is produced, this space is vented so that a full-surface bearing of the internal tube against the external tube is achieved, to which end the internal tube is acted upon from its inside by gas under pressure.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: June 14, 1994
    Assignee: Wilhelm Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5141427
    Abstract: Pipes with special profile sections are produced by an apparatus with circuit guided half shells. The half shells combining to form a mold have mold walls extending about parallel to a mold space axis. Vacuum slits extend about parallel to the mold space axis to open into a mold space in each case at a place radially the most distant from the mold space axis.
    Type: Grant
    Filed: July 8, 1991
    Date of Patent: August 25, 1992
    Assignee: Wilhelm Hegler
    Inventors: Ralph-Peter Hegler, Wilhelm Hegler
  • Patent number: 5071173
    Abstract: A plastic pipe for sewer pipe reconstruction has at least one spigot, the outer diameter of which is smaller than the outer diameter of the pipe. It has furthermore a socket end the outer diameter of which is substantially equal to the outer diameter of the pipe. Its inner diameter is substantially equal to the outer diameter of the spigot. In order to construct such a pipe that, while having high crushing strength, it has low weight and insensitivity to damage in the outer area, and can be used for short-pipe relining, the pipe and the at least one spigot have annular protrusions. Furthermore, the outer diameter of the protrusions of the spigot corresponds substantially to the inner diameter of the socket end. The pipe is very rigid.
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: December 10, 1991
    Assignee: Wilhelm Hegler
    Inventors: Wilhelm Hegler, Ralph-Peter Hegler
  • Patent number: 4930936
    Abstract: A partial-seepage drainage pipe includes a wall surface of circular profile which is corrugated over the majority of the pipe circumference. Adjoining the circular wall surface is a base having a bottom surface and side wall segments. The pipe has a mating sleeve molded on in one piece at one end, which is adapted to receive the free end of a corrugated pipe segment and has slit-like water seepage openings in the corrugated wall surface.In order to attain a tight mating-sleeve connection, the bottom surface of the base and the corresponding bottom surface of the mating sleeve are embodied such that they arch in a slightly convex fashion.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: June 5, 1990
    Assignee: Wilhelm Hegler
    Inventors: Wilhelm Hegler, Ralph-Peter Hegler
  • Patent number: 4915425
    Abstract: A pipe connecting element serves to connect pipes, which consist essentially of a continuous inner pipe and connected with it, extending radially outwards, projections, which serve to stiffen the pipe. To make such a pipe connecting element suitable to the light construction concept of double walled pipes or corrugated pipes on the one hand and achieve high load capacity in the direction of the pipe axis and good hydraulic properties on the other, the pipe connecting element consists of connected with each other sections, which are constructed by a core pipe and a jacket pipe. Adjacent sections are connected on their butt joint surfaces in such a manner that the core pipes and the jacket pipes each of these adjacent sections are connected with each other. Additionally, the core pipe and the jacket pipe of each section are firmly connected with each other.
    Type: Grant
    Filed: October 19, 1988
    Date of Patent: April 10, 1990
    Assignee: Wilheim Hegler
    Inventors: Wilhelm Hegler, Ralph-Peter Hegler
  • Patent number: 4900503
    Abstract: An apparatus for producing a finned tube from synthetic plastics material has a moulding chamber which moves in the direction of production. Molten synthetic plastics charge enters this moulding chamber from which fins are moulded one after another, the fins being in each case formed individually one after another. In order to ensure this procedural measure, there are constructed in the surface of the molten plastics material present in the moulding chamber annular raised portions with conveying surfaces trailing in the direcetion of production. Corresponding conveying grooves are constructed in the half moulds which bound the molding chamber. These measures ensure an accurate contour of the tube which is to be produced, ensuring that a reverse flow of molten plastics charge and its combustion will be prevented.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: February 13, 1990
    Assignee: Wilhelm Hegler
    Inventors: Wilhelm Hegler, Ralph-Peter Hegler
  • Patent number: 4779651
    Abstract: A plastic corrugated tube, in the outer wall of which has a circular ring corrugation, is provided on one end with an integrally molded-on plain coupler having an approximately cylindrical inner face. Its inside diameter (d) is substantially equal to the outside diameter (d) of the corrugated tube, and the circular rings that form the corrugation and are spaced apart from one another by the distance (T) in the longitudinal direction of the tube each have the approximate cross section of a trapezoid tapering toward the outside; to this end, they have an approximately annular-cylindrical outer wall section (a) and slightly inclined side wall sections adjoining the outer wall section.
    Type: Grant
    Filed: January 29, 1987
    Date of Patent: October 25, 1988
    Assignee: Wilhelm Hegler
    Inventors: Wilhelm Hegler, Ralph-Peter Hegler
  • Patent number: 4773451
    Abstract: Double tubing comprises two flexible plastic protective tubes (1, 2), integrally joined with one another via a web (5), which are embodied as corrugated tubes. For installing the double tubing without damage and to prevent deformation of the protective tubes, and in this manner to make them particularly suitable for plumbing applications, fastening holes (11) for fastening screws (17) are embodied in the web (5). Each fastening hole (11) is embodied between two corrugation crests (3) disposed opposite one another in pairs, and in the area of the respective fastening hole (11) the crests (3) are deformed into secant-like defining walls (12) of the respective fastening hole (11).
    Type: Grant
    Filed: March 18, 1987
    Date of Patent: September 27, 1988
    Assignee: Wilhelm Helger
    Inventors: Wilhelm Hegler, Ralph-Peter Hegler
  • Patent number: 4513787
    Abstract: A plastic corrugated sheathing hose adapted for electric cable installation and producible in one continuous operation, includes a longitudinal slit along its side. Each edge of the hose adjacent the slit is complementarily configured to form a detent or snap-locking closure releasably engageable in overlapping relationship. After insertion of a cable through the sheathing hose slit, closure of the hose is accomplished by pressing overlapped complementarily configured together. Closure of the hose in this manner results in a substantially gas-tight and waterproof cable enclosure accomplished in one operation with the inlaying of the cable.
    Type: Grant
    Filed: October 26, 1983
    Date of Patent: April 30, 1985
    Assignee: Wilhelm Hegler
    Inventors: Wilhelm Hegler, Ralph-Peter Hegler
  • Patent number: 4492551
    Abstract: An apparatus for the production of plastic pipes with transverse grooves comprising half shells each having a mold recess which are arranged on a machine bed driven in a cycle. The half shells are assembled in pairs in a molding path to form a complete mold, the injection head of an extruder being arranged at the beginning of the molding path. Furthermore, the half shells are provided with vacuum channels, each vacuum channel being connected to a respective mold recess. The vacuum channels are joined into vacuum connections formed in the machine bed, and the half shells are provided with cooling channels which join into cooling water inlets and outlets in the machine bed. In order to ensure an exact setting of the half shells during the molding operation, the cooling channels, on the one hand, and the vacuum channels on the other hand, in a given half shell are completely separated from each other.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: January 8, 1985
    Assignee: Wilhelm Hegler
    Inventors: Wilhelm Hegler, Ralph-Peter Hegler
  • Patent number: 4488467
    Abstract: An apparatus for cutting openings in pipes of cuttable material, in particular in plastics drainage pipes has at least one cutter head carrying at least one cutter, the cutter head rolling at least in part on the periphery of the pipe and being positively driven for this by means of a planetary gear. By virtue of this, the cutting edge of the cutter moves around the pipe in an epitrochoid. The cutter head is provided with ridges engaging in transverse corrugations in the outer wall of the pipe.In order to be also able to cut openings in pipes formed at least in part with annular corrugations over their periphery, at least the cutter head is provided with helically extending ridges and the at least one cutter is disposed parallel to these ridges.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: December 18, 1984
    Assignee: Wilhelm Hegler
    Inventors: Wilhelm Hegler, Ralph-Peter Hegler