Peristaltic pump having a self-closing occlusion bed

摘要

Peristaltic pump assemblies in which the closing and opening of a pivoting or sliding door is coordinated with movement of the occlusion bed toward and away from the rotor assembly to engage and disengage tubing within the occlusion pathway are disclosed. Linkage mechanisms provided by the interaction of cam surfaces with rollers, as well as bar linkage mechanisms, are disclosed. The linkage mechanism, in addition to providing precise displacement of the occlusion bed, may also provide an over-center feature that enhances safety and pump operation when the door is in a closed position. Latching mechanisms and sensors may be incorporated. Adaptive components such as tubing cassettes routing aspiration and/or infusion tubing in a predetermined configuration to mate with occlusion pathways in aspiration and/or infusion pump assemblies provided in various types of medical devices and control consoles are also provided.

主权项

1. A peristaltic pump assembly comprising a rotor assembly having a plurality of rollers mounted in a rotatable housing; an occlusion bed slidably mounted in a spaced apart relationship to the rotor assembly and having a curved surface facing the rotor assembly that forms an occlusion surface for tubing retained in an occlusion pathway during operation of the peristaltic pump, a pivoting door adjustable between an open condition providing access to the occlusion pathway and a closed condition in which access to the occlusion pathway is blocked, a spring coupled to the occlusion bed, wherein the spring maintains the spaced apart relationship between the rotor assembly and occlusion bed, and a linkage mechanism comprising a pair of cam surfaces mounted on the door and a pair of rollers mounted directly or indirectly to the occlusion bed and positioned to contact the cam surfaces as the pivoting door is closed and opened.