---
publication_id: "OT-2026-000002609"
title: "Passive control system for an everting sheath"
published_at: "2026-09-15T19:14:10.674661Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000002609"
categories:
  - "robotics-automation/robot-architectures"
keywords:
  - "b25j18/06"
  - "b25j18/06"
  - "b25j19/0004"
  - "a61m25/01"
  - "a61m25/0119"
  - "a61m25/0119"
---

# Passive control system for an everting sheath

## Abstract

Apparatuses, systems, and methods are disclosed for regulating an eversion process in everting sheath systems to avoid uncontrolled deployment of the sheath. The sheath system includes a reel and a sheath stored thereon, where the sheath is capable of everting from a retracted position to an extended position as the reel rotates about a rotational axis. The rotational characteristics of the reel are controlled by a torque mechanism operable to directly or indirectly apply a passive torque to the reel to adjust a rate at which the sheath is released from the reel as the sheath everts from the retracted position to the extended position.