Patent · US Active

Door closer comprising cam drive

US8826494B2 · kind B2 · utility

4Cited by

19References

13Claims

0Family size

Assignee

Dorma GmbH + Co. KG · DE

Inventors

Volker Bienek · Dortmund, DE
Sabine Wiemann · Ennepetal, DE
Thomas Pabst · Leonberg, DE

Key dates

Filing date	Nov 30, 2010
Grant date	Sep 9, 2014
Priority date	—
Expiry date	Jun 25, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/87917
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A door closer including a free-swing function, including a door closer housing, an output shaft connected to a door, a piston assembly connected to the output shaft and guided in the door closer housing, a closer spring, a piston rod adapted to connect the piston assembly to the closer spring, a free-swing assembly adapted to enable a translational motion of the piston assembly decoupled from the closer spring when the closer spring is locked, and a hydraulic lock compartment adapted to lock the closer spring. The output shaft is a cam-shaped rolling contour, in particular a cam disc, and the piston assembly includes at least one cam roller abutting on the rolling contour.

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