# US 2019/0316583 A1 · Eccentric screw pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0316583 A1 - Document ID: US20190316583A1 - Status: Published application - Kind: A1 - Application number: 16/343,230 - Filed: 2016-11-09 - Published: 2019-10-17 - Earliest claimed: 2016-11-09 - Assignees: Seepex GmbH - Applicants: Seepex GmbH - Inventors: Norman DICKS; Stefan GOETHEL; Marcel GRIESDORN; Peter MCGARIAN; Dirk OVERMEIER; Vsevolod RYVKIN - Web page: https://patentgrep.com/patent/US20190316583A1 ## CPC - F04C 15/0061: {Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions} - F04C 2/1073: {where one member is stationary while the other member rotates and orbits} - F04C 11/006: {having complementary function} - F04C 2230/60: Assembly methods - F04C 2230/80: Repairing methods - F04C 2230/85: Methods for improvement by repair or exchange of parts - F04C 2240/30: Casings or housings - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract What is concerned is an eccentric screw pump having at least one stator (1), a rotor (2) rotating in the stator, a drive (3) for the rotor, a pump housing (4) which is connected to the stator (1) and has at least one inlet opening (6) for the medium to be conveyed, a connection housing (14) arranged between the pump housing (4) and drive (3), a connection shaft (9) which is connected to the drive (3) and is arranged at least in certain regions in the connection housing (14), and a coupling rod (10) which is arranged in the pump housing (4) and is connected to the connection shaft (9) via a drive-side joint (11) and to the rotor (2) via a rotor-side joint (12). The drive-side housing connection piece (16) can be demounted in such a way that the drive-side joint (11) can be exposed for maintenance or demounting. ## Claims ### Claim 1 An eccentric screw pump comprising: a stator, a rotor rotatable in the stator about an axis, a drive for rotating the rotor about the axis, a pump housing connected with the stator and having at least one intake port or output port for a medium to be conveyed, a drive-connection housing provided between the pump housing and the drive, a drive shaft connected with the drive and in the drive-connection housing, a drive-side coupling in the drive-connection housing and connected to the drive shaft of the drive, a coupling rod in the pump housing and connected with the drive shaft by the drive-side coupling and with the rotor by a rotor-side coupling, a drive-side housing connector connected between the pump housing and the drive-connection housing and surrounding the drive-side coupling, and a stator-side housing connector connected to the stator, the drive-side housing connector is disassemblable in such a manner that the drive-side coupling can be exposed for maintenance or disassembly. ### Claim 2 (depends on 1) The pump according to claim 1, wherein the drive-side housing connector can be disassembled in such a manner that the drive-side coupling is no longer surrounded by the drive-side housing connector all around the housing connector. ### Claim 3 (depends on 2) The pump according to claim 2, wherein the drive-side housing connector can be disassembled in such a manner that the drive-side coupling is fully exposed in the coupling region. ### Claim 4 (depends on 1) The pump according to claim 1, wherein the drive-connection housing is pivotal about a vertical axis of rotation relative to base plane of the pump in the assembled state of the pump housing and when the drive-side housing connector is disassembled. ### Claim 5 (depends on 1) The pump according to claim 1, wherein the drive-side housing connector has a fixed first section and a second movable section that is displaceable axially toward the intake or output port of the pump housing onto the first section. ### Claim 6 (depends on 1) The pump according to claim 1, wherein the intake port is formed by an inflow funnel. ### Claim 7 (depends on 1) The pump according to claim 1, wherein the coupling rod is provided with an auger attached to an outer surface of the coupling rod. ### Claim 8 (depends on 5) The pump according to claim 5, wherein the second movable section is sealed relative to the fixed first section with at least one seal. ### Claim 9 (depends on 3, 4, 5, 6, 7, 8) The pump according to one of claims 3 to 8, claim 5, wherein the second movable section is tubular and essentially cylindrical. ### Claim 10 (depends on 1) The pump according to claim 1, wherein the coupling rod is supported to prevent it from being lowered and/or to prevent displacement during disassembly of the drive-side housing connector. ### Claim 11 (depends on 10) The pump according to claim 10, claim 10, wherein the coupling rod is supported by the second movable section. ### Claim 12 (depends on 10) The pump according to claim 10, wherein a partition wall is provided in the drive-side housing connector and separates a drive-side chamber from an interior of the pump housing, the partition wall having a hole, through which the coupling rod passes. ### Claim 13 (depends on 12) The pump according to claim 12, wherein the coupling rod is supported in the hole at least during disassembly of the drive-side housing connector. ### Claim 14 (depends on 12) The pump according to claim 12, wherein the partition wall is provided in a fixed first section of the drive-side housing connector. ### Claim 15 (depends on 12) The pump according to claim 12, wherein the coupling rod is supported in the hole by a seal. ### Claim 16 (depends on 1) The pump according to claim 1, wherein the second section is provided with one or with multiple flush fittings. ### Claim 17 An eccentric screw pump comprising: a base; a stator on the base; a rotor rotatable in the stator about an axis; a drive for rotating the rotor about the axis; a pump housing on the base between the drive and the stator and forming an intake or output port for a medium to be conveyed; a drive-connection housing fixed on the base and extending from the drive toward the pump housing; a drive shaft extending from the drive into the drive-connection housing; a drive-side coupling in the drive-connection housing and connected to the drive shaft of the drive; a coupling rod in the pump housing and connected with the drive shaft by the drive-side coupling and with the rotor by a rotor-side coupling; a stator-side housing connector on the base and connected between the stator and the pump housing; a drive-side housing connector connected between the pump housing and the drive-connection housing and having parts movable between a closed position surrounding and containing the drive-side coupling and an open position exposing the drive-side coupling; and a pivot supporting the drive-connection housing on the base for pivotal movement in the open position of the drive-side housing from a use position supporting the drive-side coupling and the drive shaft in line between the drive and the coupling rod and a maintenance position with the drive-side coupling and drive shaft projecting laterally from the axis. ### Claim 18 An eccentric screw pump comprising: a stator; a rotor rotatable in the stator about an axis; a drive for rotating the rotor about the axis; a pump housing connected with the stator and having at least one intake port or output port for a medium to be conveyed; a drive-connection housing provided between the pump housing and the drive; a drive shaft connected with the drive and in the drive-connection housing; a drive-side coupling in the drive-connection housing and connected to the drive shaft of the drive; a coupling rod in the pump housing and connected with the drive shaft by the drive-side coupling and with the rotor by a rotor-side coupling; a drive-side housing connector connected between the pump housing and the drive-connection housing and surrounding the drive-side coupling; and a stator-side housing connector connected to the stator; the drive-side housing connector being disassemblable in such a manner that the drive-side coupling can be exposed for maintenance or disassembly; a support engageable with the coupling rod to prevent the coupling rod from being lowered or displaced during disassembly of the drive-side housing connector. ### Claim 19 (depends on 18) The eccentric screw pump defined in claim 18, wherein the support is a movable section of the drive-side housing connector.