A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
WINDOW SHADE WITH SPRING ASSIST
A window shade system includes a roller, fabric wrapped on the roller, a flexible line wrapped around a drum that supports the fabric, a clutch coupled to the drum, a constant torque spring applying torque to the fabric, and a variable torque spring that applies torque to clutch.
WINDOW SHADE WITH SPRING ASSIST
A window shade system includes a roller, fabric wrapped on the roller, a flexible line wrapped around a drum that supports the fabric, a clutch coupled to the drum, a constant torque spring applying torque to the fabric, and a variable torque spring that applies torque to clutch.
WINDOW SHADE WITH SPRING ASSIST
MCPHERSON JR JERRY L (author)
2016-10-06
Patent
Electronic Resource
English
IPC:
E06B
Feste oder bewegliche Abschlüsse für Öffnungen in Bauwerken, Fahrzeugen, Zäunen oder ähnlichen Einfriedungen allgemein, z.B. Türen, Fenster, Läden, Tore
,
FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES, OR LIKE ENCLOSURES, IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES