Patents Assigned to Hackforth GmbH & Co. KG
  • Publication number: 20020082091
    Abstract: A shaft coupling has at least one elastomer transmission element that is provided on its surface with an aging-resistant, opaque layer. The layer is vulcanized to the transmission element.
    Type: Application
    Filed: February 8, 2002
    Publication date: June 27, 2002
    Applicant: Hackforth GmbH & Co. KG
    Inventors: Jurgen Walter, Ulrich Falz
  • Patent number: 6234903
    Abstract: A shaft coupling (1) has at least one elastic torque transmission element (4) in a single piece to which connecting elements (3) are fixed at the driving and driven sides. In order to increase the stressability due to the thermal stresses on the elastic transmission elements (4) and thus to ensure higher power densities with smaller volumes, at least one cooling element (6) made of a good heat-conducting material is non-detachably embedded in the transmission element (4). The cooling element (6) extends through a core zone of maximum heat generation and through a relatively cooler outer zone of the transmission element (4).
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: May 22, 2001
    Assignee: Hackforth GmbH & Co. KG
    Inventors: J├╝rgen Walter, Ulrich Falz
  • Patent number: 5484339
    Abstract: An articulated coupling, especially for rail vehicles, for transmitting the engine power from a hollow input shaft mounted on the vehicle frame, to an output shaft of limited movement surrounded by the hollow shaft has a first flange rigidly connected to the hollow shaft and a second flange rigidly connected to the output shaft. Two pairs of links connect the flanges. An overhung intermediate member surrounds the output shaft, with the links being supported on the intermediate member. To obtain optimum central symmetry; the two flanges are aligned, all the links are of equal length and so positioned relatively to one another that the projections of the articulation points in a plane extending perpendicularly to the output shaft form the corners of a square. The two opposite links on the intermediate member are pivotally supported at their center. These two links form an obtuse angle facing in the direction of the output shaft.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: January 16, 1996
    Assignee: Hackforth GmbH & Co. KG
    Inventors: Ivan W. Birioukov, Hasan G. Usmanov
  • Patent number: 5360375
    Abstract: The device for mechanically transmitting torque from a motor to a power transmission is especially suitable for marine propulsion systems as a sound-damping transfer coupling of a drive shaft. The device comprises a damping member with two halves mirror-symmetrical relative to a plane that is perpendicular to the axial direction. Each half is a composite body comprised of a first and a second conical rubber ring of opposite conical orientation. The second conical rubber ring is concentrically arranged inside the first conical rubber ring. A metallic conical center ring is vulcanized to the mantle surfaces of the first and second conical rubber rings that are facing one another. A metallic outer ring is vulcanized to an outer conical mantle surface of the first conical rubber ring and a metallic inner ring is vulcanized to an inner conical mantle surface of the second conical rubber ring.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: November 1, 1994
    Assignee: Hackforth GmbH & Co. KG
    Inventors: Ulrich Falz, Jurgen Walter, Manfred Lunke
  • Patent number: 5066263
    Abstract: A resilient shaft coupling, especially for Diesel engine drives, essentially comprises two rigid coupling parts such as a hub on the drive side of the shaft coupling and a flange ring on the end of the drive shaft opposite to the drive side, whereby the hub and the flange ring are connected in an elastic rotating manner via a series of identical elastic annular connecting links. Radial supports for the elastic annular connecting links are provided at one of the rigid coupling parts in order to avoid improperly restraint masses that cause imbalance of the shaft due to centrifugal forces. In order to improve the angular movability of the resilient shaft coupling, the radial supports are provided with angular movability. This is achieved by a metallic ring membrane which provides angular movability between two axially neighboring annular connecting links, whereby the ring membrane is clamped between the connecting rims of the annular connecting links.
    Type: Grant
    Filed: November 2, 1990
    Date of Patent: November 19, 1991
    Assignee: Hackforth GmbH & Co. KG
    Inventors: Manfred Lunke, Ulrich Falz, Jurgen Walter
  • Patent number: 4929115
    Abstract: A resilient shaft coupling in which a rigid primary and a rigid secondary coupling member are connected together by at least one resilient annular assembly of a multi-part construction that is composed of a number of ring segments that are identical and run circumferentially in close succession. Each segment is composed of axially outer metallic segment plates and an inner rubber body that has a trapezoidal cross-sectional shape with a radially outwardly increasing width in an axial plane. In order to obtain higher thermal stressability of the shaft coupling, at least one window is provided in the rubber body of each segment. The ends of the window end in the vicinity of the radial end faces of the segment. Openings are also provided in the two segment plates of each segment and are congruent with the window in the rubber body.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: May 29, 1990
    Assignee: Hackforth GmbH & Co., KG
    Inventors: Manfred Lunke, Ulrich Falz, Jurgen Walter
  • Patent number: 4911484
    Abstract: To produce a pipe connection, one of the pipes that are to be interconnected has a pipe end that is widened in a cuplike manner, in which the pipe end of the other pipe is positively lodged. Before the two pipe ends are fixed together, a metallic clamping ring, the inside diameter of which is less than the outside diameter of the outer pipe end, is placed onto the inner pipe end. With the aid of a suitable assembly tool, the clamping ring is then pressed onto the outer pipe end. This produces a radial compression of the interengaging pipe ends, and simultaneously a radial expansion of the clamping ring in the elastic range. So that the clamping ring in the assembled position produces a deformation and clamping of the interengaging pipe ends over as great an axial length as possible, the outer surface of the clamping ring has an encircling reduction in the central section between the shorter substantially cylindrical end sections.
    Type: Grant
    Filed: December 20, 1988
    Date of Patent: March 27, 1990
    Assignee: Hackforth GmbH & Co. KG
    Inventor: Bernhard Hackforth
  • Patent number: 4795402
    Abstract: A resilient shaft coupling having two metal parts that include an inner coupling ring and, coaxial thereto, an outer coupling ring. The facing generated surfaces of the rings are formed with a number of substantially radial cams or dogs which mesh with one another alternately in the circumferential direction and extend to near the pertaining opposite generated surface. Each two circumferentially consecutive cams or dogs form a pair whose adjacent surfaces are concave and delimit a chamber whose longitudinal axis extends parallel to the rotational axis of the coupling, and in which a resilient coupling member is disposed. The coupling members are radially biased or pre-loaded by a predetermined amount, and are secured to the generated surfaces of the inner and outer ring coupling rings. With the coupling in its rest position, gaps or spaces are present between each resilient coupling member and each cam or dog, and permit the members to deform freely and thus to be stressed in shear.
    Type: Grant
    Filed: June 25, 1987
    Date of Patent: January 3, 1989
    Assignee: Hackforth GmbH & Co. KG
    Inventor: Peter Reichardt
  • Patent number: 4781654
    Abstract: A resilient shaft coupling that, to transmit torque, includes an annular intermediate member made of rubber disposed between an inner rigid coupling part and an outer rigid coupling part. The intermediate member has, on its outer periphery, pinion-like rubber teeth that mesh, with provision for axial movement, with companion inner teeth of the outer coupling part. The radially inner zone of the intermediate member is embodied as a member of uniform torsional strength. For radial support of the projecting portions of the outer zone, at least one closed metal ring is embedded in the rubber concentrically of the rotational axis near the radially inner interface of the zone and near each of the axial outer surfaces. The rings are preferably in the form of cables made from wire strands. To further increase the transmissible torque, the rubber of the outer zone is harder than the rubber of the inner zones.
    Type: Grant
    Filed: December 17, 1986
    Date of Patent: November 1, 1988
    Assignee: Hackforth GmbH & Co. KG
    Inventors: Jurgen Walter, Manfred Lunke, Ulrich Falz
  • Patent number: 4768644
    Abstract: A scraper device having a number of identical scraper elements that extend one beside another substantially over the width of a conveyer belt. Each scraper element basically comprises: a metal scraper or doctor blade that is in resilient engagement with the conveyer belt; an arm that supports the scraper blade; and a resilient articulation that is disposed at the free end of the support arm. The stationary part of the articulation is releasably secured to a common support tube that extends transverse to the direction of conveyance and parallel to the conveyer belt. The point where the scraper edge engages the belt in relation to the pivot axis of the resilient articulation is such that the base of a perpendicular line from such axis to the belt lies on the approach side of the belt at a slight distance ahead of the point of engagement.
    Type: Grant
    Filed: July 22, 1987
    Date of Patent: September 6, 1988
    Assignee: VULKAN Verfahrenstechnik B. Hackforth GmbH & Co. KG
    Inventor: Gerd W. Cromm
  • Patent number: 4610642
    Abstract: A link coupling having at least one coupling hub and one outer coupling flange interconnected by links or groups of links which are disposed at a tangent to the rotational axis. The links are arranged in pairs at an angle to one another, and are secured at their ends, by dowels or bolts, alternately to the hub and to the coupling flange. As an improvement, bolt-on ring segments are provided on at least one coupling part for the securing of the links. The bores for receiving the securing bolts or fasteners are enlarged, i.e. are formed with clearance. Unavoidable tolerances in bore diameters, and spacing errors, can therefore be compensated especially along with increase in reliability of operation.
    Type: Grant
    Filed: February 21, 1985
    Date of Patent: September 9, 1986
    Assignee: Hackforth GmbH & Co. KG
    Inventors: Ulrich Falz, Manfred Lunke, Jurgen Walter
  • Patent number: 4563166
    Abstract: An extra-resilient shaft coupling. Two rigid parts are interconnected by a resilient intermediate member which transmits torque. The intermediate member includes two external metal ring members which are in the form of one or more peripheral parts and are interconnected by an elastomeric material, preferably vulcanized in situ. To avoid over-stressing the elastomeric material at the regions adjacent to the metal parts, the ring members, near the outer peripheral surface of the rubber element, are provided with an axially projecting annular shoulder which abuts an edge region of the rubber element. The inner peripheral edge of the ring members has an approximately V cross-section, the point of the V being rounded and the outer side surface being recessed relative to the outer surface of the ring member to thus form a peripheral recess for receiving a lip formed on the rubber element.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: January 7, 1986
    Assignee: Hackforth GmbH & Co. KG
    Inventors: Jurgen Walter, Ulrich Falz, Manfred Lunke
  • Patent number: 4483056
    Abstract: The invention relates to a tool for closing pipe couplings between metal pipes (4, 5), the end of one pipe (4) being closingly engageable in a widened terminal part (6) of the other pipe (5), a sleeve ring (7) being pressed axially on to the widened part over the end face thereof. According to the invention, two pressing jaws (1, 2) movable towards and away from one another parallel to the pipe axes are provided and are forked in the pipe engaging zone, the sleeve ring (7) being retained in one pressing jaw (1) while the other pressing jaw (2) engages by means of tongs-action clamping jaws (10) with the funnel-shaped constriction between the widened part of the pipe and the unwidened part thereof. The outer ends of the clamping jaws (10) take the form of half-shells (12) which are in laterally inverted relationship to one another and whose inner shell surfaces are adapted to the pipe periphery.
    Type: Grant
    Filed: July 13, 1982
    Date of Patent: November 20, 1984
    Assignees: Kurt O. Moebius, Hackforth GmbH & Co. KG
    Inventors: Dieter Schwalm, Rainer Neumann
  • Patent number: 4432739
    Abstract: A spring steel, liquid-damped shaft coupling in which the torque is transmitted between an inner part and an outer part coaxial therewith by means of radial spring elements disposed in discrete liquid-filled chambers, the liquid in any chamber being displaced, in response to a relative movement, by the spring elements into the adjacent chamber; outwardly axially parallel torsion spring elements are provided on the radial spring elements and connect the same to the outer coupling part. To increase the torsional resilience, therefore, a torsion tube is connected to each radial spring element and projects axially on one side relative to the radial spring element; and a torsion bar extends in the torsion tube, is frictionally secured to the projecting end thereof, and at its other end engages in the outer coupling part at a distance from the radial spring element in such a way as to rotate solidly with the outer coupling part.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: February 21, 1984
    Assignee: Hackforth GmbH & Co. KG
    Inventor: Jurgen Walter
  • Patent number: 4389204
    Abstract: A resilient shaft coupling. The parts of the coupling are supported by being radially braced against one another, but are movable relative to one another to a limited extent in the axial direction. One of the parts of the coupling contains an outer flange secured to a cylindrical jacket, the free end of which merges into an inwardly projecting flange. The other, inner part of the coupling contains a matching flange to which a bearing ring is rigidly secured and has an external collar coaxial with the axis of rotation and separated by a narrow annular gap from the inner wall of the jacket. The gap contains at least one bearing bushing which is adjacent the collar and jacket and radially braces parts against one another without preventing axial motion thereof. The parts are interconnected by at least one resilient annular member secured on one side to the matching flange and on the other side to the outer flange.
    Type: Grant
    Filed: March 26, 1981
    Date of Patent: June 21, 1983
    Assignee: Hackforth GmbH & Co. KG
    Inventor: Jurgen Walter
  • Patent number: 4347716
    Abstract: A flexible shaft coupling is of the kind comprising two annular assemblies which transmit torque between two rigid coupling parts which are arranged concentrically one within the other. The annular assemblies are concentric and have a space between them, and groups of radially directed filament loops or turns, which are embedded in an elastomeric mass, extend around members of the assemblies to interconnect the assemblies. Parts of the loops or turns between the members are supported on elastic cushions, which are formed by parts of the elastomeric masses, and are displaceable inwards into gaps between the members and within the elastomeric masses. The members of one assembly are attached to one coupling part and the members of the other assembly are attached to the other coupling parts.
    Type: Grant
    Filed: September 16, 1980
    Date of Patent: September 7, 1982
    Assignee: Hackforth GmbH & Co., KG
    Inventors: Josef Hackforth, Jurgen Walter
  • Patent number: 4277958
    Abstract: A flexible shaft coupling is of the kind comprising two annular assemblies which transmit torque between two rigid coupling parts which are arranged concentrically one within the other. The annular assemblies are concentric and have a space between them, and groups of radially directed filament loops or turns, which are embedded in an elastomeric mass, extend around members of the assemblies to interconnect the assemblies. Parts of the loops or turns between the members are supported on elastic cushions, which are formed by parts of the elastomeric masses, and are displaceable inwards into gaps between the members and within the elastomeric masses. The members of one assembly are attached to one coupling part and the members of the other assembly are attached to the other coupling parts.
    Type: Grant
    Filed: July 26, 1978
    Date of Patent: July 14, 1981
    Assignee: Hackforth GmbH & Co. KG
    Inventors: Josef Hackforth, Jurgen Walter
  • Patent number: 4257135
    Abstract: An assembly tool for tube fittings, including a pair of pivotal manually operated channel-shapped unique leg lever handles which nest one in the other and are provided with a pair of jaws which are connected to the lever handles by a set of low friction rotatable journal shafts, the extremities of the journal shafts being journalled in the lower handles; the journal shafts being positions to maintaine the jaws in parallel relation, while under load, and are provided with coaxial channels to receive the ends of a tube fitting and press the ends of the tube fitting toward each other thereby to cause interengagement of the fitting components; the jaws being readily interchangeable to assemble fittings of a different size or construction. A further embodiment includes a clamp means incorporated in one of the channels to grip a portion of the tube element, the other jaw receiving a flaring (swaging) tool for the clamped tube element.
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: March 24, 1981
    Assignee: Hackforth GmbH & Co. KG
    Inventor: Kurt O. Moebius
  • Patent number: 4249394
    Abstract: A flexible shaft coupling comprises a rigid hub coupling part and a rigid ring coupling part which surrounds the hub part concentrically, the two parts being connected together by two similar symmetrically disposed resilient rings which bulge outwards away from each other to form a cavity between them. In order to vary the resilience of the coupling to suit requirements and avoid torsional oscillations, the outwardly bulging parts of the resilient rings are supported against each other by a resiliently deformable annular element which extends axially across, but does not fill, the cavity.
    Type: Grant
    Filed: March 27, 1979
    Date of Patent: February 10, 1981
    Assignee: Hackforth GmbH & Co. KG
    Inventor: Jurgen Walter
  • Patent number: 4245729
    Abstract: A safety shaft coupling member for coupling together two coaxial shafts and ncorporating an overload safety device, which causes complete interruption of the transmission of torque when an acceptable maximum torque is exceeded, comprises a hub sleeve which is adapted to be fixed to a driven shaft, and a cup-shaped assembly in which the hub sleeve is freely rotatably mounted and is capable of limited axial displacement. The hub sleeve and the cup-shaped assembly have concentric toothed end faces situated in a common plane extending normal to the axis of rotation of the coupling member, and a first annular piston has two annular sets of teeth arranged to mesh with the toothed end faces.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: January 20, 1981
    Assignee: Vulkan Kupplungs-und Getriebebau Bernhard Hackforth GmbH & Co. KG
    Inventors: Manfred Lunke, Jurgen Walter