---
publication_id: "OT-2026-000002423"
title: "Screw actuator"
published_at: "2026-09-15T19:12:53.174532Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000002423"
categories:
  - "robotics-automation/robot-architectures"
keywords:
  - "b25j9/123"
  - "b25j9/123"
  - "f16h25/20"
  - "b25j17/0241"
  - "b25j9/10"
  - "b25j9/102"
---

# Screw actuator

## Abstract

The invention includes a screw actuator. The screw actuator includes a screw having a screw shaft and a screw nut. The screw shaft defines a first longitudinal axis along its length. The screw nut at least partially surrounds the screw shaft. The screw actuator includes a motor having a stator and a rotor. The rotor is mechanically coupled to the screw shaft. The stator at least partially surrounds the rotor. The screw actuator includes a first rigid member having a length dimension oriented along the first longitudinal axis. The screw actuator includes a second rigid member mechanically constrained relative to the first rigid member. The second rigid member is configured to move along a direction of the first longitudinal axis.