Flexible or portable closure – partition – or panel – Roll type – With rotating means
Patent
1998-12-10
2000-12-05
Johnson, Blair M.
Flexible or portable closure, partition, or panel
Roll type
With rotating means
160309, 160296, 188296, 192 583, 192216, A47G 502
Patent
active
06155328&
ABSTRACT:
A winding mechanism for controlling the retraction and deployment of an architectural covering, such as a window blind or shade having a winding element, about which the covering, or its lift cord or tapes are wound and unwound with rotation of the winding element about a first axis of rotation, and a fluid brake for retarding the rotation of the winding element in at least one direction about the first axis. The fluid brake comprises a fluid tight compartment containing a liquid and an impeller. The compartment and the impeller are adapted for relative rotation about a second axis, which can be the same as or coaxial with the first axis. Either the compartment or the impeller is operatively connected to the winding element. In operation the liquid rotates with the rotation of the compartment or the impeller about the second axis. Rotation of the liquid relative to the impeller or to the compartment in at least a first direction about the second axis is effective to retard the rotation of the winding element in at least a second direction about the first axis. The impeller, or a peripheral wall surface of the compartment has a first surface that extends generally radially and substantially parallel with respect to the second axis.
REFERENCES:
patent: 2618370 (1952-11-01), Orwin
patent: 4666386 (1987-05-01), Winkler et al.
patent: 5355979 (1994-10-01), Stephan et al.
patent: 5634507 (1997-06-01), Kwoka
Chironis, N. P. et al., Mechanisms and Mechanical Devices Sourcebook, McGraw-Hill 1996, p. 359 (hydraulic governor).
McGraw-Hill Concise Encyclopedia of Science & Technology, 1982, pp. 808-809 .
Hunter Douglas International N.V.
Johnson Blair M.
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