Pneumatic control system

US10760318B2 · kind B2 · utility

Assignee

• Aventics GmbH · DE

Inventors

• Norbert Fortmann · Hannover, DE
• Tim Warning · Lehrte, DE
• Florent Orget · Hannover, DE

Key dates

• Filing date: Aug 21, 2017
• Grant date: Sep 1, 2020
• Expiry date: Aug 21, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/895
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The disclosure relates to a pneumatic control system for a working cylinder, which pneumatic control system enables resistance-free manual motion of the device driven by the working cylinder in the event of a failure or switch-off of the compressed air supply and is independent of electrical supply. The problem is solved by means of a pneumatic control system having a double-acting working cylinder, the two chambers of which can be connected oppositely to a compressed air source and a compressed air outlet by means of a controllable supply device having two operating positions, an independently resetting 3/2-way valve switchable by means of a control pressure being arranged before each chamber in a connecting line to the supply device, which 3/2-way valves connect the chambers to bleeding outlets in a first switching position and to the supply device in a second switching position, and a parallel circuit of a check valve and a throttle point being arranged before each chamber, the check valves of which parallel circuits block in the backflow direction, wherein the two 3/2-way valves assume the first switching position in the idle position and can be switched by means of a common co…