Compact pinch valve

摘要

A pinch valve includes first and second pinch arms pivotally mounted about respective pivot axes. A spring interconnects the first and second pinch arms to mutually bias the pinch arms towards each other and provide a pinching force for pinching respective first and second conduits. A cam engages with each of the pinch arms and provides an unpinching force for either one of the pinch arms against the bias of the sprint.

主权项

1. A pinch valve comprising:
a body; a cam rotatably mounted on the body about a cam axis; a first pinch arm pivotally and rotatably mounted on the body about a first pivot axis parallel with the cam axis, the first pinch arm comprising a first cam follower for engagement with the cam and a first pinch element for pinching a first conduit, the first conduit being positioned between the first pinch element and the cam axis; a second pinch arm pivotally and rotatably mounted on the body about a second pivot axis parallel with the cam axis, the second pinch arm comprising a second cam follower for engagement with the cam and a second pinch element for pinching a second conduit, the second conduit being positioned between the second pinch element and the cam axis; and a resilient element linearly interconnecting the first and second pinch arms between respective first and second spring mount locations, the resilient element mutually biasing the first and second pinch arms towards each other such that movement of the first pinch arm alters a biasing force exerted on the second pinch arm,wherein the cam is positioned between the resilient element and the pivot axes; andwherein the mutual biasing of the first and second pinch arms towards each other provides a pinching force for pinching the first and second conduits.