Patent · US Active

Door actuator

US9181744B2 · kind B2 · utility

15Cited by

14References

9Claims

0Family size

Assignee

Dorma GmbH + Co. KG · DE

Inventors

Thomas Salutzki · Ennepetal, DE
Alexander Hellwig · Ennepetal, DE
Jan Meulenbeld · Breckerfeld, DE

Key dates

Filing date	Nov 14, 2012
Grant date	Nov 10, 2015
Priority date	—
Expiry date	Nov 14, 2032

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE05Y2900/132
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A door operator for operating a door includes a housing, an output shaft with a cam disc, an opening piston guided in the housing, which piston, on a first side, bears against the cam disc, an energy accumulator acting upon the opening piston for storing a closing energy for the door, and a damping piston guided in a cylindrically shaped hollow space of a cylinder element, and which piston, on a second side, bears against the cam disc, wherein the cylinder element is firmly connected to the opening piston.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.