US20120134819A1 - Fluid Turbine Featuring Improved Blade Mounting Structure - Google Patents
Fluid Turbine Featuring Improved Blade Mounting Structure Download PDFInfo
- Publication number
- US20120134819A1 US20120134819A1 US12/954,895 US95489510A US2012134819A1 US 20120134819 A1 US20120134819 A1 US 20120134819A1 US 95489510 A US95489510 A US 95489510A US 2012134819 A1 US2012134819 A1 US 2012134819A1
- Authority
- US
- United States
- Prior art keywords
- rotor blade
- axis
- fluid turbine
- pitch angle
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 31
- 238000003491 array Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/062—Rotors characterised by their construction elements
- F03D3/066—Rotors characterised by their construction elements the wind engaging parts being movable relative to the rotor
- F03D3/067—Cyclic movements
- F03D3/068—Cyclic movements mechanically controlled by the rotor structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/062—Rotors characterised by their construction elements
- F03D3/064—Fixing wind engaging parts to rest of rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/50—Kinematic linkage, i.e. transmission of position
- F05B2260/506—Kinematic linkage, i.e. transmission of position using cams or eccentrics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
- F05B2260/79—Bearing, support or actuation arrangements therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
Definitions
- the present disclosure relates to a fluid turbine comprising a rotor having an array of rotor blades disposed circumferentially thereabout.
- the rotor has an axis of rotation, and comprises at least two rotor blades disposed at a radius from the axis of rotation, each rotor blade having a pitch axis and a variable pitch angle.
- a pitch control mechanism is operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade from a first pitch angle at a first circumferential location about the axis of rotation to a second pitch angle at a second circumferential location about the axis of rotation.
- the pitch of each rotor blade is controlled via an actuating rod running from the blade to the rotor hub.
- the present disclosure relates to a fluid turbine comprising a rotor and a pitch angle control mechanism.
- the rotor has an axis of rotation, and comprises at least two rotor blades disposed at a radius from the axis of rotation, each rotor blade having a first end, a second end, a first mounting point, a second mounting point, a pitch axis and a variable pitch angle, each of the first and second mounting points being disposed inboard of the first and second ends.
- the pitch angle control mechanism is operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade from a first pitch angle at a first circumferential location about the axis of rotation to a second pitch angle at a second circumferential location about the axis of rotation.
- the present disclosure relates to a fluid turbine comprising a rotor and a pitch angle control mechanism.
- the rotor has an axis of rotation and comprises a first hub, a second hub, an array of at least two struts, having strut covers disposed thereabout, extending from each of the first and second hubs, and at least two rotor blades, each secured to the distal end of a strut and having a pitch axis and a variable pitch angle.
- the mechanism is operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade from a first pitch angle at a first circumferential location about the axis of rotation to a second pitch angle at a second circumferential location about the axis of rotation.
- FIG. 1 is an isometric view of a fluid turbine according to certain embodiments of the present disclosure
- FIG. 2 is a view of the underside of a rotor blade according to certain embodiments of the present invention.
- FIG. 3 is a cutaway view of the rotor blade of FIG. 2 showing the blade attachment mechanism and pitch control linkage;
- FIG. 4 is a section view of a second embodiment of a rotor blade having a different attachment mechanism from the rotor blade of FIGS. 2 and 3 ;
- FIG. 5 is a section view of a third embodiment of a rotor blade having a different attachment mechanism from the rotor blades of FIGS. 2-4 ;
- FIG. 6 is an isometric view of the pivot assembly shown in FIG. 4 ;
- FIG. 7 is an isometric view of the pivot assembly shown in FIG. 5 ;
- FIG. 8 is a section view of the pivot assembly shown in FIGS. 5 and 7 ;
- FIG. 9 is a front section view of a rotor blade showing the receiving pocket for a pivot assembly of the type shown above;
- FIGS. 10 and 11 are views of a first embodiment of a turbine blade strut cover.
- FIGS. 12 and 13 are views of a second embodiment of a turbine blade strut cover.
- FIG. 1 is an isometric view of a fluid turbine 100 according to certain embodiments of the present disclosure.
- turbine 100 consists of a rotor assembly comprising a torque tube 102 .
- Torque tube 102 is designed to prevent rotor hubs 108 from rotating independently of one another.
- Torque tube 102 is oriented along a central axis which is intended to be disposed generally perpendicular to the direction of fluid flow.
- the turbine 100 comprises arrays of radially-disposed struts 104 , each mounted to one of rotor hubs 108 at its proximal end and a rotor blade 106 at its distal end.
- Turbine 100 shown in FIG. 1 comprises 10 blades, but alternate embodiments may have more or fewer blades, depending on the application.
- Each rotor blade 106 is attached to a strut 104 in such a manner as to allow the rotor blade 106 to be individually pivoted with respect to the axis of rotation of turbine 100 , thus altering the pitch angle of each rotor blade 106 with respect to the direction of fluid flow through turbine 100 .
- the angle of the rotor blades may be controlled via mechanical linkages, hydraulics, pneumatics, linear or rotary electromechanical actuators, or any combination thereof.
- the rotor pitch angle profile may be controlled by a cam-and-follower mechanism operating in concert with one or more of the above systems of actuation.
- FIG. 2 is an oblique detail view of the underside of a rotor blade.
- FIG. 3 is an oblique cutaway view of the rotor blade showing the blade attachment mechanism and pitch control linkage.
- each rotor blade 106 is secured to a strut 104 by means of a pivot joint 252 allowing the rotor blade 106 freedom of movement to be moved to different pitch angles.
- the pitch angle of each rotor blade is controlled by an actuation rod 208 secured to the rotor blade at rod end 254 .
- the actuation rod 208 is connected at its other end to a pitch control mechanism, such as a cam-and-follower mechanism, disposed in the rotor hub 108 .
- the pitch control mechanism is able to vary the pitch of the blade 106 as it moves through the fluid stream.
- FIG. 4 is a section view of a second embodiment of a rotor blade 106 having a different attachment mechanism from the rotor blade 106 of FIGS. 2 and 3 .
- FIG. 5 is a section view of a third embodiment of a rotor blade 106 .
- FIG. 6 is an isometric view of a first embodiment of a pivot assembly 300 shown in FIG. 4 .
- FIG. 7 is an isometric view of a second embodiment of a pivot assembly 300 shown in FIG. 5 .
- FIG. 8 is a section view of the pivot assembly 300 shown in FIGS. 5 and 7 .
- FIG. 9 is a front section view of the rotor blade 106 of FIGS. 4 and 5 showing the receiving pocket for the pivot assembly 300 of FIG. 8 .
- rotor blade 106 has a pivot assembly 300 disposed in a receiving pocket 306 in the center thereof.
- the pivot assembly 300 is pivotably secured to a strut rod end 302 and an actuation rod end 304 , which pass through a slot 308 on the underside of rotor blade 106 .
- strut rod end 302 functions to maintain the position of rotor blade 106
- actuation rod end 304 functions to control the pitch of rotor blade 106 as it moves radially about the rotor.
- each strut 104 and actuation rod 208 are disposed within a strut cover 212 .
- Certain embodiments of strut covers are shown in FIGS. 10-13 .
- each strut 104 may be disposed within a centrally-located and axially-aligned strut aperture 256
- each actuation rod 208 may be disposed within a parallel actuation rod aperture 258 .
Abstract
Description
- According to a first aspect, the present disclosure relates to a fluid turbine comprising a rotor having an array of rotor blades disposed circumferentially thereabout. The rotor has an axis of rotation, and comprises at least two rotor blades disposed at a radius from the axis of rotation, each rotor blade having a pitch axis and a variable pitch angle. A pitch control mechanism is operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade from a first pitch angle at a first circumferential location about the axis of rotation to a second pitch angle at a second circumferential location about the axis of rotation. The pitch of each rotor blade is controlled via an actuating rod running from the blade to the rotor hub.
- According to a second aspect, the present disclosure relates to a fluid turbine comprising a rotor and a pitch angle control mechanism. The rotor has an axis of rotation, and comprises at least two rotor blades disposed at a radius from the axis of rotation, each rotor blade having a first end, a second end, a first mounting point, a second mounting point, a pitch axis and a variable pitch angle, each of the first and second mounting points being disposed inboard of the first and second ends. The pitch angle control mechanism is operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade from a first pitch angle at a first circumferential location about the axis of rotation to a second pitch angle at a second circumferential location about the axis of rotation.
- According to a third aspect, the present disclosure relates to a fluid turbine comprising a rotor and a pitch angle control mechanism. The rotor has an axis of rotation and comprises a first hub, a second hub, an array of at least two struts, having strut covers disposed thereabout, extending from each of the first and second hubs, and at least two rotor blades, each secured to the distal end of a strut and having a pitch axis and a variable pitch angle. The mechanism is operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade from a first pitch angle at a first circumferential location about the axis of rotation to a second pitch angle at a second circumferential location about the axis of rotation.
-
FIG. 1 is an isometric view of a fluid turbine according to certain embodiments of the present disclosure; -
FIG. 2 is a view of the underside of a rotor blade according to certain embodiments of the present invention; -
FIG. 3 is a cutaway view of the rotor blade ofFIG. 2 showing the blade attachment mechanism and pitch control linkage; -
FIG. 4 is a section view of a second embodiment of a rotor blade having a different attachment mechanism from the rotor blade ofFIGS. 2 and 3 ; -
FIG. 5 is a section view of a third embodiment of a rotor blade having a different attachment mechanism from the rotor blades ofFIGS. 2-4 ; -
FIG. 6 is an isometric view of the pivot assembly shown inFIG. 4 ; -
FIG. 7 is an isometric view of the pivot assembly shown inFIG. 5 ; -
FIG. 8 is a section view of the pivot assembly shown inFIGS. 5 and 7 ; -
FIG. 9 is a front section view of a rotor blade showing the receiving pocket for a pivot assembly of the type shown above; -
FIGS. 10 and 11 are views of a first embodiment of a turbine blade strut cover; and -
FIGS. 12 and 13 are views of a second embodiment of a turbine blade strut cover. - A system and method of the present patent application will now be described with reference to various examples of how the embodiments can best be made and used. Like reference numerals are used throughout the description and several views of the drawings to indicate like or corresponding parts, wherein the various elements are not necessarily drawn to scale.
-
FIG. 1 is an isometric view of afluid turbine 100 according to certain embodiments of the present disclosure. Structurally,turbine 100 consists of a rotor assembly comprising atorque tube 102. Torquetube 102 is designed to preventrotor hubs 108 from rotating independently of one another.Torque tube 102 is oriented along a central axis which is intended to be disposed generally perpendicular to the direction of fluid flow. Theturbine 100 comprises arrays of radially-disposedstruts 104, each mounted to one ofrotor hubs 108 at its proximal end and arotor blade 106 at its distal end. Therotor blades 106 shown inFIG. 1 are high aspect ratio airfoils/hydrofoils having a clearly defined leading and trailing edge.Turbine 100 shown inFIG. 1 comprises 10 blades, but alternate embodiments may have more or fewer blades, depending on the application. Eachrotor blade 106 is attached to astrut 104 in such a manner as to allow therotor blade 106 to be individually pivoted with respect to the axis of rotation ofturbine 100, thus altering the pitch angle of eachrotor blade 106 with respect to the direction of fluid flow throughturbine 100. The angle of the rotor blades may be controlled via mechanical linkages, hydraulics, pneumatics, linear or rotary electromechanical actuators, or any combination thereof. In certain embodiments, the rotor pitch angle profile may be controlled by a cam-and-follower mechanism operating in concert with one or more of the above systems of actuation. -
FIG. 2 is an oblique detail view of the underside of a rotor blade.FIG. 3 is an oblique cutaway view of the rotor blade showing the blade attachment mechanism and pitch control linkage. As seen inFIGS. 2 and 3 , eachrotor blade 106 is secured to astrut 104 by means of apivot joint 252 allowing therotor blade 106 freedom of movement to be moved to different pitch angles. As described above, the pitch angle of each rotor blade is controlled by anactuation rod 208 secured to the rotor blade atrod end 254. Theactuation rod 208 is connected at its other end to a pitch control mechanism, such as a cam-and-follower mechanism, disposed in therotor hub 108. Using theactuation rod 208, the pitch control mechanism is able to vary the pitch of theblade 106 as it moves through the fluid stream. -
FIG. 4 is a section view of a second embodiment of arotor blade 106 having a different attachment mechanism from therotor blade 106 ofFIGS. 2 and 3 .FIG. 5 is a section view of a third embodiment of arotor blade 106.FIG. 6 is an isometric view of a first embodiment of apivot assembly 300 shown inFIG. 4 .FIG. 7 is an isometric view of a second embodiment of apivot assembly 300 shown inFIG. 5 .FIG. 8 is a section view of thepivot assembly 300 shown inFIGS. 5 and 7 .FIG. 9 is a front section view of therotor blade 106 ofFIGS. 4 and 5 showing the receiving pocket for thepivot assembly 300 ofFIG. 8 . - As seen in
FIGS. 4-9 ,rotor blade 106 has apivot assembly 300 disposed in a receivingpocket 306 in the center thereof. Thepivot assembly 300 is pivotably secured to astrut rod end 302 and anactuation rod end 304, which pass through aslot 308 on the underside ofrotor blade 106. In a similar manner to that described above,strut rod end 302 functions to maintain the position ofrotor blade 106, whileactuation rod end 304 functions to control the pitch ofrotor blade 106 as it moves radially about the rotor. - In order to improve aerodynamic efficiency and protect the structural integrity of the mechanism, each
strut 104 andactuation rod 208 are disposed within astrut cover 212. Certain embodiments of strut covers are shown inFIGS. 10-13 . As seen in these figures, eachstrut 104 may be disposed within a centrally-located and axially-alignedstrut aperture 256, and eachactuation rod 208 may be disposed within a parallelactuation rod aperture 258. - It is believed that the operation and construction of the embodiments of the present patent application will be apparent from the detailed description set forth above. While the exemplary embodiments shown and described may have been characterized as preferred, it should be readily understood that various changes and modifications could be made therein without departing from the scope of the present invention as set forth herein.
Claims (20)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/954,895 US20120134819A1 (en) | 2010-11-28 | 2010-11-28 | Fluid Turbine Featuring Improved Blade Mounting Structure |
PCT/US2011/062260 WO2012071588A1 (en) | 2010-11-28 | 2011-11-28 | Fluid turbine featuring improved blade mounting structure |
US14/070,474 US20150125298A1 (en) | 2010-11-28 | 2013-11-01 | Fluid turbine for power generation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/954,895 US20120134819A1 (en) | 2010-11-28 | 2010-11-28 | Fluid Turbine Featuring Improved Blade Mounting Structure |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120134819A1 true US20120134819A1 (en) | 2012-05-31 |
Family
ID=46126789
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/954,895 Abandoned US20120134819A1 (en) | 2010-11-28 | 2010-11-28 | Fluid Turbine Featuring Improved Blade Mounting Structure |
Country Status (2)
Country | Link |
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US (1) | US20120134819A1 (en) |
WO (1) | WO2012071588A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100322769A1 (en) * | 2008-02-25 | 2010-12-23 | Thomas Glenn Stephens | Fluid turbine optimized for power generation |
US20110110779A1 (en) * | 2009-11-06 | 2011-05-12 | Thomas Glenn Stephens | Fluid turbine featuring articulated blades and phase-adjusted cam |
EP2957768A1 (en) * | 2014-06-16 | 2015-12-23 | Cockerill Maintenance & Ingenierie S.A. | Improved vertical axis wind turbine |
WO2017046330A1 (en) * | 2015-09-17 | 2017-03-23 | Nenuphar | Vertical-axis wind turbine and methods for assembly and disassembly |
AT17521U1 (en) * | 2020-09-08 | 2022-06-15 | Etzl Martin | Rotor blade for a vertical axis wind turbine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6394745B1 (en) * | 2000-05-26 | 2002-05-28 | Saeed Quraeshi | Straight-bladed vertical axis wind turbine |
US20100322769A1 (en) * | 2008-02-25 | 2010-12-23 | Thomas Glenn Stephens | Fluid turbine optimized for power generation |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7329099B2 (en) * | 2005-08-23 | 2008-02-12 | Paul Harvey Hartman | Wind turbine and energy distribution system |
US7911076B2 (en) * | 2006-08-17 | 2011-03-22 | Broadstar Developments, Lp | Wind driven power generator with moveable cam |
-
2010
- 2010-11-28 US US12/954,895 patent/US20120134819A1/en not_active Abandoned
-
2011
- 2011-11-28 WO PCT/US2011/062260 patent/WO2012071588A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6394745B1 (en) * | 2000-05-26 | 2002-05-28 | Saeed Quraeshi | Straight-bladed vertical axis wind turbine |
US20100322769A1 (en) * | 2008-02-25 | 2010-12-23 | Thomas Glenn Stephens | Fluid turbine optimized for power generation |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100322769A1 (en) * | 2008-02-25 | 2010-12-23 | Thomas Glenn Stephens | Fluid turbine optimized for power generation |
US20110110779A1 (en) * | 2009-11-06 | 2011-05-12 | Thomas Glenn Stephens | Fluid turbine featuring articulated blades and phase-adjusted cam |
EP2957768A1 (en) * | 2014-06-16 | 2015-12-23 | Cockerill Maintenance & Ingenierie S.A. | Improved vertical axis wind turbine |
WO2017046330A1 (en) * | 2015-09-17 | 2017-03-23 | Nenuphar | Vertical-axis wind turbine and methods for assembly and disassembly |
FR3041388A1 (en) * | 2015-09-17 | 2017-03-24 | Nenuphar | VERTICAL AXIS WIND MOLDS AND METHODS OF MOUNTING AND DISASSEMBLING |
AT17521U1 (en) * | 2020-09-08 | 2022-06-15 | Etzl Martin | Rotor blade for a vertical axis wind turbine |
Also Published As
Publication number | Publication date |
---|---|
WO2012071588A1 (en) | 2012-05-31 |
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Legal Events
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AS | Assignment |
Owner name: BROADSTAR WIND SYSTEMS GROUP, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BRANTLEY, BRANDON D.;VANCE, ROBERT C.;DUDLEY, FRANCIS;REEL/FRAME:026227/0564 Effective date: 20101103 |
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AS | Assignment |
Owner name: BROADSTAR INVESTMENT COMPANY, LLC, CONNECTICUT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BROADSTAR WIND SYSTEMS GROUP, LLC;REEL/FRAME:027387/0978 Effective date: 20110222 |
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Owner name: CONNECTICUT DEVELOPMENT AUTHORITY, CONNECTICUT Free format text: PATENT COLLATERAL ASSIGNMENT AND SECURITY AGREEMENT;ASSIGNOR:BROADSTAR INVESTMENT COMPANY, LLC;REEL/FRAME:027464/0362 Effective date: 20111228 |
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Owner name: BROADSTAR ENERGY CORPORATION, CONNECTICUT Free format text: SECURITY AGREEMENT;ASSIGNORS:BROADSTAR INVESTMENT COMPANY LLC;ENHANCED CAPITAL CONNECTICUT FUND I, LLC;ENHANCED CAPITAL CONNECTICUT FUND II, LLC;AND OTHERS;REEL/FRAME:027505/0935 Effective date: 20111230 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |