Title:
SPRING COUNTERBALANCE APPARATUS AND METHOD
Document Type and Number:
WIPO Patent Application WO/2014/169172
Kind Code:
A3
Abstract:
A spring counterbalance apparatus and method consists of a shade system with a torque profile, where the shade system is connected with a drive shaft. A first spring system is connected with the drive shaft where the first spring system is a standard wound spring system. A second spring system is connected with the drive shaft where the second spring system is a reverse wound spring system and where, in combination, the first spring system and the second spring system produce a counterbalance torque profile approximately equal to the shade system torque profile.
Inventors:
MULLET WILLIS JAY (US)
HAND RICHARD SCOTT (US)
OAKLEY LUCAS HUNTER (US)
HAND RICHARD SCOTT (US)
OAKLEY LUCAS HUNTER (US)
Application Number:
PCT/US2014/033735
Publication Date:
October 29, 2015
Filing Date:
April 11, 2014
Export Citation:
Assignee:
QMOTION INC (US)
International Classes:
E06B9/60
Foreign References:
| US5590741A | 1997-01-07 | |||
| US20020157796A1 | 2002-10-31 | |||
| US3291474A | 1966-12-13 | |||
| US20100024994A1 | 2010-02-04 |
Attorney, Agent or Firm:
PROSKEY, Christopher, A. et al. (P.L.C.Capital Square 400 Locust Street Suite 20, Des Moines IA, US)
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