---
publication_id: "OT-2026-000003117"
title: "Switch-over device"
published_at: "2026-09-15T19:32:38.391886Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000003117"
categories:
  - "tools-tooling/clamping-tools"
---

# Switch-over device

## Abstract

A switch-over device which is useful for a gas insufflation device using liquid gas includes at least two inflow channels each blockable by a valve and at least one outflow channel for alternate removal of a fluid medium from a plurality of containers. The device has a switch-over piston movably mounted in a housing and comprising a base member which has at each end a valve closure member in a form of a body of rotation. The switch-over piston is driven by a pressure difference between the fluid media and connects one of the inflow channels to the outflow channel in each of two switching positions. A working chamber accommodates the switch-over piston, with sealing elements being provided for closing off the inflow channels in a pressure tight manner when the switch-over piston is in the correspondingly closed position and for dividing the working chamber into two portions sealed off from each other. The switch-over piston and/or the working chamber is constructed so that at least one sealing element can be arranged selectively in different positions. The size of the areas of the switch-over piston which are acted upon by the fluid media and determined the switch-over point is determined by the position of the sealing element.

## 1. Drawings

[0001] Sheet 1.

[0002] Sheet 2.

[0003] Sheet 3.

[0004] Sheet 4.

[0005] Sheet 5.

[0006] Sheet 6.

[0007] Sheet 7.