Safety catch device for elevators

US5377788A · kind A · utility

Assignee

• C. Haushahn GmbH & Co. · DE

Inventors

• Joachim Biewald · Tengen, DE
• Volker Scheub · Waiblingen, DE
• Helge Holler · Pforzheim, DE
• Karl Fenkl · Stuttgart, DE
• Stefan Hugel · Schwaikheim, DE
• Jorg Rothaupt · Schwäbisch Gmünd, DE
• Peter M. Schneider · Ditzingen, DE
• Wolfgang Barth · Bietigheim-Bissingen, DE
• Hermann Moll · Backnang, DE
• Horst Pollmann · Weil der Stadt, DE

Key dates

• Filing date: Jul 30, 1993
• Grant date: Jan 3, 1995
• Expiry date: Jul 30, 2013

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B5/22
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A safety catch device for elevator cars guided on at least one guide rail includes a braking device acting on the at least one guide rail for braking the elevator car and a control device for controlling the braking force of the braking device in dependence on the load and/or deceleration. The control device includes a control mass which is influenced by the acceleration of the elevator car and a brake spring which is deflected in accordance with the position of the control mass. The brake spring is coupled to the control mass and the braking device in such a way that a reduced braking force is applied by the braking device on the at least one guide rail in the case of a high deceleration of the elevator car and an increased braking force is applied by the braking device on the at least one guide rail in the case of a lower deceleration of the elevator car.