Invention Grant
- Patent Title: Adjustable counterbalance system for roller doors
- Patent Title (中): 滚轮门可调平衡系统
-
Application No.: US12567410Application Date: 2009-09-25
-
Publication No.: US08267146B2Publication Date: 2012-09-18
- Inventor: Friedhelm Frede
- Applicant: Friedhelm Frede
- Applicant Address: SE Landskrona
- Assignee: Assa Abloy Entrance Systems AB
- Current Assignee: Assa Abloy Entrance Systems AB
- Current Assignee Address: SE Landskrona
- Agency: Frommer Lawrence & Haug LLP
- Agent Ronald R. Santucci
- Main IPC: E05F13/00
- IPC: E05F13/00 ; E05F15/00 ; A47G5/02 ; A47H3/00
Abstract:
A counterbalance system for a rollup door system having a drum in which the counterbalance provides a counter force acting at a distance from the center of rotation of the drum. The counter force is variable in both direction and magnitude at various angular positions of the drum.
Public/Granted literature
- US20110073262A1 ADJUSTABLE COUNTERBALANCE SYSTEM FOR ROLLER DOORS Public/Granted day:2011-03-31
Information query
