Twind (R)

Caution: Twind seems to have evolved a second foci, one with just one tether,
so avoid seeing the graphic as the only offer.

2010 PDF document shows more interest in a single-line yo-yo method. First showings concerned the double affair. A new direction toward a SINGLE tether with one trunk of parts in yo-yo method seems to be grabbing their attention. See their new 10 page PDF. See AWEgroup M108 thread.

Pulci document is not yet available, only abstract and :

ENERGY GENERATION SYSTEM WITH SELF OPENING AND CLOSING OF SAILS
Applicant: ZANETTISTUDIOS S R L [IT] ; ZANETTI GIANCARLO [IT]
IPC: F03D5/00; F03D5/06; F03D5/00
Priority Date: 2008-08-08
Publication info: WO2010015720 (A2) - 2010-02-11
Inventor: ZANETTI GIANCARLO [IT]
PCT/EP2009/060311
EP2009/060311 as the application number

WO2010015720

French SYSTÈME DE GÉNÉRATION D'ÉNERGIE À OUVERTURE ET FERMETURE AUTOMATIQUES DE VOILES

One of the first foci by Twind Technology concept uses a pair of captive balloons at an altitude of 800 meters. The tether cables transmit force to a rotating platform on the ground.

Each balloon has a sail connected to it. The two balloons move alternately, the balloon with the sail open moves downwind and draws the other balloon upwind, and then the motion reverses. The tether cable can be used to turn the shaft of a generator to produce electrical energy.

TWIND technology is a concept Zanettistudios S.r.l. and intends to propose an innovative method in order to exploit the Eolic energy with low costs, higher continuity and a minor environmental impact. TWIND activities are described in Internet site: Twind®

TWIND technology is undergoing the European patent demand no. 08425554.6 of August 8, 2008.

The name TWIND and relative patent have been deposited at Italian National Registry of Patents and Trademarks [Ed: spelling. Email clarification was sent on May 23, 2009]

Patent number:	WO2010015720 (A2) ENERGY GENERATION SYSTEM WITH SELF OPENING AND CLOSING OF SAILS M2788
Publication date:	2010-02-11
Inventor(s):	ZANETTI GIANCARLO [IT] + (ZANETTI, GIANCARLO)
Applicant(s):	ZANETTISTUDIOS S R L [IT]; ZANETTI GIANCARLO [IT] +
Classification:
- international:	F03D5/00; F03D5/06; F03D5/00
- european:
Application number:	WO2009EP60311 20090807
Priority number(s):	EP20080425554 20080808; EP20090151327 20090126; EP20090153560 20090225

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Abstract of WO 2010015720 (A2)
A solution for generating energy from a fluid flow (105) is proposed. A corresponding energy generation system (100; 500; 600) includes energy conversion means (120; 520), sail means ( 130; 530a,530b) switchable between an active condition for being carried away from the energy conversion means by the fluid flow and a passive condition for minimizing said carrying away, connection means (125; 525) for connecting the sail means to the energy conversion means, the energy conversion means generating said energy when the sail means in the active condition is carried away, return means (120; 530a,530b) for returning the sail means in the passive condition towards the energy conversion means, and switching means for switching the sail means to the passive condition and to the active condition in response to a maximum distance and to a minimum distance thereof, respectively, from the energy conversion means. In the solution according to an embodiment of the invention, the sail means includes a pair of sail modules (230u,230d) slidable along the connection means, each sail module being individually switchable between the active condition and the passive condition; the switching means then includes stopping means (135; 535a,535b) for each sail module, the stopping means being adapted to stop the sliding of the corresponding sail module in the active condition when carried away thereby causing the switching thereof to the passive condition, passive locking means (310u,310d,325) for each sail module, the passive locking means being adapted to lock the corresponding stopped sail module in the passive condition, coupling means (245) for sliding each sail module locked in the passive condition in opposition to the fluid flow to a standing position (240u,240d) along the connection means by the other sail module in the active condition when carried away, and active locking means (240u,240d,325) for each sail module, the active locking means being adapted to lock the corresponding sail module in the standing position thereby causing the switching thereof to the active condition after the unlocking from the passive condition.

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