# US 5,350,284 A · Peristaltic pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,350,284 A - Document ID: US5350284A - Status: Granted - Kind: A - Application number: 08/060,032 - Filed: 1993-05-10 - Granted: 1994-09-27 - Earliest claimed: 1992-05-11 - Assignees: Allweiler AG - Inventors: Werner Wehling - Web page: https://patentgrep.com/patent/US5350284A ## CPC - F04B 43/1253: {by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing} - F04B 43/0072: {of tubular flexible members} - F16L 33/00: Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses (connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics F16L47/00) - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL ## Abstract In a peristaltic pump comprising a pump tube with elastically deformable wall, which pump tube is arranged in a pump housing and is fitted into the pump housing with a portion which is curved in a part-circular configuration around a shaft of a rotor of the peristaltic pump and at a radial spacing from the shaft, the cross-section of the pump tube being partially varied during the conveying operation with a reduction in the internal volume. The connection ends of the pump tube are accessible from the exterior and are fixed in the region of wall connections or the like members of the pump housing. The tube end of the pump tube is clamped in a wall connection approximately between the inside diameter (d) of the pump housing and a tangent (Q) to the inside surface of the wall of the pump housing through the intersection (N) thereof with the pump diameter (D) which is approximately parallel to the center lines (M) of the wall connections. ## Claims ### Claim 1 A peristaltic pump which comprises: a pump tube for conveying material with elastically deformable walls and connection ends, wherein the cross-section of the pump tube is partially varied during the conveying operation with a reduction in the internal volume thereof; a pump housing for the pump tube having wall connections thereof with center lines, and having a pump housing wall with an inside surface thereof and an inside diameter, wherein the pump tube is arranged in the pump housing and is fitted in the pump housing with a portion thereof which is curved in a part circular configuration, and wherein the pump tube ends are accessible from the outside of the pump housing; a pump shaft and a pump rotor within the pump housing, wherein the curved portion of the pump tube is curved around the shaft at a radial spacing from the shaft; wherein the tube ends of the pump tube form a U-shape in plan view and are fixed in the region of the wall connections of the pump housing; wherein the tube connection ends of the pump tube are clamped in the wall connection of the pump housing between 1) the inside diameter d of the pump housing and 2) a tangent (Q) to the inside surface of the pump housing wall through the intersection thereof with the pump diameter (D) which is approximately parallel to the center lines of the pump housing wall connections; and at least one packing ring of elastic material clamped between the wall connection of the pump housing and the pump tube. ### Claim 2 (depends on 1) A pump according to claim 1 wherein at least one of the pump tube ends is clamped near the inside diameter (d) of the pump housing. ### Claim 3 (depends on 1) A pump according to claim 1 wherein the clamping region of the tube end is determined by a shoulder-like gland base whose spacing relative to the inside surface of the pump housing wall approximately corresponds to the thickness of the pump housing wall. ### Claim 4 (depends on 2) A pump according to claim 2 wherein at least one packing ring of elastic material is clamped between the gland base and a closure element of the pump housing wall connection. ### Claim 5 (depends on 4) A pump according to claim 4 wherein the closure element is a gland cover. ### Claim 6 (depends on 5) A pump according to claim 5 including an elastomer gland as the packing ring. ### Claim 7 (depends on 6) A pump according to claim 6 including a gland base ring provided between the gland base and the packing ring. ### Claim 8 (depends on 7) A pump according to claim 7 wherein the diameter of the pump housing wall connection at the gland base is larger than the outside diameter of the pump tube. ### Claim 9 (depends on 8) A pump according to claim 8 wherein a pump connection is inserted on the pump housing wall connections and is held to the gland cover by means of an outer rib projecting therefrom. ### Claim 10 (depends on 9) A pump according to claim 9 wherein the pump connection bears supportingly with an insert portion at the inside against the cross-section of the pump tube, at least in the clamping region thereof.