Abstract: A feeding device for an in-line screw machine with a shaft rotating in a feed container. A conveying screw is arranged in the direction toward the longitudinal axis of the rotating shaft. At least one disk wheel is allocated to each longitudinal side in the feed container. A separate drive is allocated to each disk wheel for purposes of rotational movement.

Abstract: The invention relates to a hand-held applicator unit for viscous materials having a screw pump disposed in a pump casing which is in communication with a drive, wherein the pump inlet has a product intake with a flexible supply line and the pump outlet contains a shaped mouthpiece.

Abstract: The invention relates to a stator casing for eccentric worm pumps comprising an elastic lining, the cylindrical stator casing having a surface on the inner side, along the longitudinal axis whereof grooves are incorporated.

Abstract: The invention relates to an eccentric screw pump and a method for its operation. Unlike the previously known prior art, where changes to the internal geometry of the pump stator caused by wear were always remedied with radially acting clamping measures, the invention is based on bringing this about by a change in the length of the lining.

Abstract: The invention relates to a clamping device which clamps the pump stator with the pump housing and an additional pump end part. The width of the clamping bars is at least 20% of the cross section of the pump stator in order to stabilise the clamping device and the simplify handling. All parts which are required to clamp the pump end part remain on the clamping bars.

Abstract: The aim of the invention is to improve the sealing possibilities between the elastic stator lining and corresponding connecting flanges of eccentric screw pumps. In order to increase the sealing surfaces, the stator lining comprises, at least at one of its ends, a conical sealing surface which may be provided with one or more prominent or recessed parts.

Abstract: The invention relates to a compact eccentric screw pump including a sliding articulation. The long-lasting operation of the pump is ensured by a plurality of functions. According to the invention, both the reaction pressure resulting from the transport pressure and the concomitant phenomena emerging from the eccentrically rotating rotor and acting on the articulation and the drive are approximately equalized.

Abstract: A stator for an eccentric spiral pump comprises a hollow body of an elastic material which has a casing comprising a plurality of segments extending in a longitudinal direction of the casing. Adjacent segments are interconnected along longitudinal sides at variable angles to each other, so that the segments enclose an entire circumference of the casing. Surfaces of the segments are of a planar configuration, so that a closed casing of polygonal cross-section is formed by the interconnected segments. The hollow body of elastic material is of a matching polygonal cross-section to achieve positive contact with the casing.

Abstract: The present invention relates to the arrangement of a stator and a spare stator. In order to avoid a permanent correction in the length of the driving shaft, the spare stator is connected to the instantaneously operated stator or is configured in a single piece. Upon occurrence of a defined amount of wear, this stator combination is merely reversed through 180° relative to the longitudinal axis or an intermediate tube is inserted so that the spare stator arrives in the rotor region.

Abstract: An eccentric screw-type pump has a pump section with a tubular pump casing, a stator cladding and a pump cavity (30) configured in correspondence with a double-thread or multi-thread screw. A screw-type rotor is connected to a driving shaft via a flexible shaft. The flexible shaft is connected at its two ends via rigid coupler elements to the rotor and the driving shaft, and is surrounded by a preloaded coaxially disposed screw.

Abstract: The universal joint coupling comprises a housing (20) in which a torque transmitting pair of coupling members is arranged between two axial force transmitting pairs of coupling members (22, 24), each of which includes a spherical cup (22) and a ball segment (24) supported therein. The torque transmitting pair of coupling members (26, 28) has grooves which are arranged in two concentric rows and are defined by gaps in an internal gear ring (26) fitted into the housing (20), or an external toothing (28). They cooperate for torque transmission with counter-acting bodies, the profile of which matches the groove profile. Both the external toothing (28) and the ball segments (24) form part of a hub (16).

Abstract: A stator jacket (12) and a stator lining (22) of elastomeric material together form a tubular pump stator (10) the ends (20) of which are connected to a connecting piece (36) of a casing portion (32, 34) each. The stator jacket (12) has at least one parting area (14) extending throughout its length. This and the region of the stator lining (22) located radially inside thereof as well as the junctions of the connecting pieces (36) with the stator jacket (12) are designed such that the pump stator (10) will burst in at least one parting area (14, 16) when a predetermined positive internal pressure is exceeded. This provides pressure relief before a risk of explosion can develop when explosives are being conveyed.

Abstract: Two pairs of axial force transmitting coupling members (22, 24) and one pair of torque transmitting coupling members (26, 28) are arranged inside a housing (20). An annular cavity (42) each is formed in the housing (20) between each of the two pairs of axial force transmitting coupling members 922, 24) and the pair of torque transmitting coupling members (26, 28). A lubricant inlet opening (44) adapted to be closed opens into one of the annular cavities (42). An air outlet opening (54) is provided at the housing (20) at least approximately diametrically opposite the lubricant inlet opening (44) and communicates with the other of the two annular cavities (42) and likewise can be closed. In this manner the cavities (42) can be filled with liquid lubricant and freed of entrapped air in full measure in a short time.

Abstract: Two pin joints, each mounted at a respective end of a coupling rod, each comprise an outer joint head including a cavity which is open at least in one axial direction as well as a diametral bore and an inner joint head disposed in the cavity and likewise including a diametral bore. A pin extends through both bores and is locked at the outer joint head by a pin retaining device. To accomplish that, the pin has two ends projecting radially out of the outer joint head and each formed with a notch transversely of the longitudinal direction of the pin. The pin retaining device is embodied by a helical spring supported at its one end in the two notches of the pin and at its other end on a shoulder. The shoulder preferably is formed at a sliding ring seal which seals the outer joint head against a housing member.

Abstract: The stator comprises a rigid tubular casing and an elastic lining which is tightly enclosed by the casing and symmetrical with respect to the longitudinal center axis of the stator. The inner surface of the lining forms a multiple thread and, in cross section, consists of a number of sections near the axis equal to the number of courses of the thread and an equally great number of concave arcs. The lining has a minimum thickness each at the concave arcs and a maximum thickness each near at least two of the transitions between the sections near the axis and the concave arcs.

Abstract: A well pump includes a string of risers composed of a plurality of releasably coupled risers, a hollow upright, and a drive mechanism releasably mounted on the upright. The corresponding erecting rig consists of a mast adapted to be supported by the upright, a deflecting device arranged at the upper end of the mast, and a pulling element passing around the deflecting device and formed at its one end for suspension of a riser and at its other end for suspension of a lifting device. The erecting rig is much lighter in weight and simpler and, therefore, may be transported and assembled more easily than lifting tackle used so far of the same lifting height and capacity.

Abstract: A filter press (10) is supplied with material to be filtered by a filling pump (20) and a high pressure pump (26). Both pumps are connected in parallel and designed as eccentric worm pumps. The charging pressure is gradually raised to a final pressure without any temporary dropping so as to reduce the charging time to a minimum. In correspondence with the gradually decreasing absorption capacity of the filter press (10) first the normal speed of the filling pump (20) is lowered to a predetermined lower operating speed at unvarying speed of the high pressure pump (26). If required, then also the speed of the high pressure pump (26) is reduced. If the absorption capacity of the filter press (10) again increases, first the speed of the high pressure pump (26) is raised again to its former value and, if necessary, subsequently the speed of the filling pump (20) is increased again.

Abstract: Improved joint seal for the rotor drive of an eccentric screw machine comprises a sealing cuff of elastomeric or thermoplastic material with a radially exterior rim bead connected to the outer joint sleeve by means of an exterior supporting ring, and a radially interior rim bead with a generally axis-parallel ring apron radially outward thereof. An interior supporting ring with an axis-parallel annular limb connects the radially interior rim bead of the cuff to a coupling rod of the joint with the annular limb of the interior supporting ring clasped between the radially interior rim bead and the ring apron disposed outwardly thereof on the sealing cuff. The radially exterior rim bead may be connected to the joint sleeve by means of an exterior suporting ring similar to the interior supporting ring.

Abstract: The method and device for the manufacture of helical rotor blanks for helical gear machines by moving a straight cylindrical shaft in a direction along the shaft axis while rotating it around the shaft axis by means of passing the shaft between at least three bending rollers, and the opposite end of the shaft held by a rotatable clamping chuck geared for infinitely variable timed relative movement with a bending roller. A first bending roller has a ring groove with a circular arc profile and a second bending roller ring groove has an elliptical profile with the second ring groove either laterally displaced or of greater width than the ring groove in the first bending roller.

Abstract: A coupling arrangement for tubes, pipes or like members in a washing machine comprises one or more tubes provided with a ring packing on one end thereof, a coupling member on the machine, and a clamping device for engaging the tube. The ring packing is formed in three integral portions including a slide ring portion for guided axial displacement, an elastically axially compressible central part and an axially fixed supporting ring. The coupling arrangement is assembled by an insertion of the slide ring portion into an opening in the coupling member and pressed therein by the clamping device which first stresses the central part and urges it toward the coupling member and thereafter allows a slight backing away of the central part away from the coupling member. The slide ring portion is formed with a conical end surface for reception in and cooperation with the coupling member of which the opening is formed with a corresponding or mating surface to maintain a light seal.