# US 8,465,405 B2 · Solid-bowl screw centrifuge with outlet openings for partial and residual emptying of the drum > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,405 B2 - Document ID: US8465405B2 - Status: Granted - Kind: B2 - Application number: 12/294,809 - Filed: 2007-03-21 - Published: 2010-02-11 - Granted: 2013-06-18 - Earliest claimed: 2006-03-30 - Assignees: GEA Mechanical Equipment GmbH - Applicants: Ludger Horstkötter; Hans-Joachim Beyer; Ulrich Horbach; Johannes Droste - Inventors: Ludger Horstkötter; Hans-Joachim Beyer; Ulrich Horbach; Johannes Droste - Web page: https://patentgrep.com/patent/US8465405B2 ## CPC - B04B 1/20: discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl - B04B 2001/2083: {Configuration of liquid outlets} - B04B: CENTRIFUGES (high-speed drum mills B02C19/11; domestic spin driers D06F; analysing, measuring or monitoring physical or chemical properties of samples during centrifuging, see the relevant subclasses for these procedures, e.g. G01N) ## Abstract A solid-bowl centrifuge that includes a drum rotatable about a horizontal axis of rotation and a screw arranged in the drum. Also included are a continuous solids discharge located at a first end of the drum and a continuous liquid discharge located at a second, opposite end of the drum. Further included is at least one discontinuously acting outlet opening including a closure device. ## Claims ### Claim 1 A solid-bowl centrifuge comprising: a drum rotatable about a horizontal axis of rotation; a screw arranged in the drum; a continuous solids discharge located at a first end of the drum; a continuous liquid discharge located at a second, opposite end of the drum; at least one discontinuously acting outlet opening including a closure device located on a radially outermost lateral surface of the drum; the closure device including a ring located on the radially outermost lateral surface of the drum and configured to be axially displaced along the radially outermost surface of the drum relative to the horizontal axis of rotation and rotatable with the drum during an operation of the centrifuge; and an actuating device assigned to the closure device by which actuating device the ring is displaced into a first position which opens the at least one outlet opening and into a second position which closes the at least one outlet opening. ### Claim 2 (depends on 1) The solid-bowl screw centrifuge according to claim 1, wherein the actuating device is a fluidic actuating device. ### Claim 3 (depends on 1) The solid-bowl screw centrifuge according to claim 1, wherein the actuating device is a hydraulic actuating device. ### Claim 4 (depends on 1) The solid-bowl screw centrifuge according to claim 1, wherein the at least one outlet opening is arranged axially before the continuous liquid discharge. ### Claim 5 (depends on 1) The solid-bowl screw centrifuge according to claim 1, wherein the at least one outlet opening lies radially outside the screw. ### Claim 6 (depends on 1) The solid-bowl screw centrifuge according to claim 1, wherein the at least one outlet opening is formed in an end region of a drum lateral surface which faces a drum lid. ### Claim 7 (depends on 6) The solid-bowl screw centrifuge according to claim 6, wherein the drum lateral surface, at its axial end before the drum lid, includes a radially protruding collar having a step, and the at least one outlet opening is formed in a region including the step. ### Claim 8 (depends on 6) The solid-bowl screw centrifuge according to claim 6, wherein a hydraulic chamber is formed one of on and in the drum lid. ### Claim 9 (depends on 8) The Solid-bowl screw centrifuge according to claim 8, wherein the drum lid has an internally conical design, and the hydraulic chamber is formed at an outer circumference of the drum lid. ### Claim 10 (depends on 8) The solid-bowl screw centrifuge according to claim 8, wherein the hydraulic chamber includes an opening chamber and a closure chamber which are operatively connected. ### Claim 11 (depends on 10) The solid-bowl screw centrifuge according to claim 10, wherein the opening chamber includes an opening, which opening leads outward from the hydraulic chamber out of the drum to discharge hydraulic fluid from the hydraulic chamber. ### Claim 12 (depends on 8) The solid-bowl screw centrifuge according to claim 8, wherein the ring includes a radial attachment extending into the hydraulic chamber, and a hydraulic conduit opens into the hydraulic chamber. ### Claim 13 (depends on 12) The solid-bowl screw centrifuge according to claim 12, wherein the hydraulic conduit passes through the drum lid and an adjoining part and is operatively connected to another hydraulic conduit on a non-rotating feed pipe. ### Claim 14 (depends on 8) The solid-bowl screw centrifuge according to claim 8, wherein the hydraulic chamber, in a region located remote from the drum, is closed by a ring secured to the drum lid. ### Claim 15 (depends on 1) The solid-bowl centrifuge according to claim 1, wherein the at least one discontinuously acting outlet opening is formed as an aperture in the form of a slot or a hole. ### Claim 16 A solid-bowl centrifuge comprising: a drum rotatable about a horizontal axis of rotation the drum having a drum lid at an end thereof; a screw arranged in the drum; a continuous solids discharge located at a first end of the drum; a continuous liquid discharge located at a second, opposite end of the drum; at least one discontinuously acting outlet opening including a closure device located on a radially outermost lateral surface of the drum lid; the closure device including a ring located on the radially outermost lateral surface of the drum lid and configured to be axially displaced along the radially outermost surface of the drum lid relative to the horizontal axis of rotation and rotatable with the drum during an operation of the centrifuge; an actuating device assigned to the closure device by which actuating device the ring is displaced into a first position which opens the at least one outlet opening and into a second position which closes the at least one outlet opening; and wherein the at least one outlet opening is formed in the drum lid. ### Claim 17 (depends on 16) The solid-bowl screw centrifuge according to claim 16, wherein the drum lid includes a radially projecting collar having a step.