{
  "abstract": "A zoned vacuum gripping tool comprising one tool-change interface, three bellows cups, one ejector, three zone branches and one vent valve. When the bellows cups reach the workpiece, the bellows cups are evacuated by the ejector. Before the workpiece reaches the set-down position, the vacuum circuit is vented by the vent valve while the workpiece is above the receiving surface. The arrangement is a proposed configuration composed from a typed library of mechanism blocks derived from published patents; it has not been constructed.",
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    "robotics-automation/end-effectors/vacuum-grippers",
    "industrial-motion-power-transmission/fluid-power/valves-and-manifolds",
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    "industrial-motion-power-transmission/fluid-power/vacuum-generation"
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    "words": 876
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  "keywords": [
    "zoned vacuum tool",
    "tool-change interface",
    "bellows cup",
    "ejector",
    "zone branch",
    "vent valve",
    "compressed air supply",
    "drop release",
    "release control",
    "tool changing"
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  "language": "en",
  "license": {
    "name": "Creative Commons Attribution 4.0 International",
    "url": "https://creativecommons.org/licenses/by/4.0/"
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  "publication_id": "OT-2026-000011469",
  "published_at": "2026-09-17T08:12:23.703080Z",
  "publisher": "Nebula Innovations Limited",
  "record_type": "disclosure",
  "schema": "opentechnical-publication-manifest/1.0",
  "supersedes": "OT-2026-000007335",
  "title": "Three bellows cup vacuum gripper, three zone face, three stage ejector, vented before set-down, on a tool changer",
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