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Peristaltic pumpRelated Patent Categories: Pumps, Expansible Chamber Type, Elongated Flexible Chamber Wall Progressively Deformed, Deformation By Rolling Or Sliding Engagement Member, Plural Spaced Engagement Members Or Member PortionsPeristaltic pump description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080025854, Peristaltic pump. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] The invention relates to a peristaltic pump for circulating a medium such as a liquid, a gas, a slurry, a granulate or a combination of two or more thereof, which pump comprises: [0002] a pump housing; [0003] a pressing surface present in this pump housing; [0004] an elastically deformable hose, a part of which lies against the pressing surface, which hose has a medium inlet and a medium outlet; and [0005] pressing means with a number of equidistantly placed pressing elements such as rollers or cams; [0006] which pressing means are drivable such that the pressing elements move along the hose; and [0007] which pressing elements during operation press the hose part in contact with the relevant pressing element against said pressing surface part while locally compressing and closing the hose part; [0008] this such that during driving of the pressing means medium is drawn in via the medium inlet and discharged under pressure via the medium outlet. [0009] Owing to the local compression, and thereby closing of the hose by the pressing elements, and the displacement of this local compression under the influence of the pressing means driven along the hose, the medium present in the hose will be pushed along. After a pressing element has passed, the form of the hose is restored due to its elastic properties. Owing to this mechanism medium is drawn into the hose on the suction side. [0010] Because it is ensured that the hose is always pressed shut locally by at least one locally acting pressing element, the pump operates as closing valve such that the delivery side and the suction side are separated from each other. [0011] The functions of the hose in a peristaltic pump or hose pump in fact display a mutual contradiction. During compression of the hose by a pressing element a hose with the smallest possible radial stiffness is desired, whereby the smallest possible compression force, drive torque, stresses in the hose, development of heat resulting from hysteresis and friction between a pressing element and the hose will occur. However, during the restoring phase after a pressing element has passed a certain degree of stiffness of the hose is desired with a view to restoring the initial, for instance round, form of the hose. This does after all define the suction capacity. [0012] In order to go a considerable way toward enabling both the stated contradictory functionalies during operation of the pump, the invention proposes a peristaltic pump of the type stated in the preamble which has the feature that a cavity is defined in the pump housing, the pressing surface of which cavity forms a boundary and in which cavity the hose and the pressing means with the pressing elements are accommodated; and the cavity is hermetically sealed and filled with a filling medium. [0013] In a specific embodiment the pump has the special feature that the pump is of the linear type. "Linear" is understood to mean a pump wherein the pressing elements follow an at least more or less linear path along the pressing surface, which pressing surface likewise has an at least more or less linear form. [0014] A peristaltic pump is further known for circulating a medium, which pump is of the rotating type and comprises: [0015] a pump housing; [0016] a curved pressing surface which is present in this pump housing and at least a part of which takes the general form of a circular arc with a central axis; [0017] an elastically deformable hose, of which a part lies against the pressing surface, which hose has a medium inlet and a medium outlet; [0018] a rotor which has a number of pressing elements, such as rollers or cams, placed at equal angular and radial positions and which serves as pressing means; [0019] which rotor is rotatingly drivable around a central axis; and [0020] which pressing elements during operation press the hose part in contact with the relevant pressing element against said pressing surface part while locally compressing and closing said hose part; [0021] this such that during the rotation of the rotor medium is drawn in via the medium inlet and discharged under pressure via the medium outlet. [0022] This pump is particularly important in the context of the invention because such a pump, generally referred to as "hose pump", is very common and is highly suitable for adaptation in terms of the teaching of the present invention. [0023] According to the invention this said rotating peristaltic pump has the feature that a cavity is defined in the pump housing, the pressing surface of which cavity forms a boundary and in which cavity the hose and the rotor are accommodated; and [0024] the cavity is hermetically sealed and filled with a filling medium. Continue reading about Peristaltic pump... Full patent description for Peristaltic pump Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Peristaltic pump patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Peristaltic pump or other areas of interest. ### Previous Patent Application: micro impedance pump for fluid logic, mixing and separation Next Patent Application: Piston pump and piston ring Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Peristaltic pump patent info. IP-related news and info Results in 0.14227 seconds Other interesting Feshpatents.com categories: Tyco , Unilever , Warner-lambert , 3m 174 |
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