CA2472856C - Improved winding wheel - Google Patents
Improved winding wheel Download PDFInfo
- Publication number
- CA2472856C CA2472856C CA 2472856 CA2472856A CA2472856C CA 2472856 C CA2472856 C CA 2472856C CA 2472856 CA2472856 CA 2472856 CA 2472856 A CA2472856 A CA 2472856A CA 2472856 C CA2472856 C CA 2472856C
- Authority
- CA
- Canada
- Prior art keywords
- winding wheel
- improved winding
- cord
- movable
- pulley
- 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.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47H—FURNISHINGS FOR WINDOWS OR DOORS
- A47H11/00—Curtain cord appurtenances
- A47H11/06—Cord pulleys
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47H—FURNISHINGS FOR WINDOWS OR DOORS
- A47H5/00—Devices for drawing draperies, curtains, or the like
- A47H5/08—Devices for drawing draperies attached to the doors or windows
Abstract
An improved winding wheel includes an anchor dock housing a pulley and a movable lid located on a lower side of the anchor dock having two biased holes. The pulley has a slant slot matching the biased holes to allow two ends of a cord to pass through in a separated manner towards two sides so that the cord may be wound on the pulley neatly without entangling. A movable anchor lug is provided on an upper side of the anchor dock. The movable anchor lug and the movable lid may be lifted and extended to form an upper and a lower open space for the pulley such that the cord may be wound rapidly without obstruction.
Description
1<1VIPTtOVED WINDING WHEEL
FIELD OF THE iNVEN"rrON
The present invention relates to an improved winding wheel and particularly to a winding wheel adopted for use on window coverings sucb as curtains, draperies, shades and the likes.
BACKGROUN OF THL YN''VLN'Y'YO]~
Window coverings such as curtains, draperies, shades and the likes usually are equippcd with a winding wheel for contt'olling a cord to open or close the window coverings. The winding wheel generally is installed on a front end, a rear end or a middle section of the curtain track, and is constructed in many different ways. FIGS.
I and 2 show a conventional winding wheel for mounting to a front end or a rear end of a curtain track. The winding wheel has a closed bottom end. As it does not have openings to allow a cord to pass through, a mounting seat must be installed on the track to hold the winding wheel. The mounting seat has a bottom section with openings formcd thereon to allow cords to pass through. The sidc plate of the winding wheel also has a notch for the cord to anchor and pass through (referring to FIG. 3). Such a design and construction is untidy and takes a lot of effort and more costs to install.
Moreover, the axle of conventional winding wheel set forth above usually is a fixed rivet. It is prone to break loose after using for a period of time. Zn additiory the winding wheel has two fixed support elements on two sides. When installing the winding wheel on the track, it should be coupled with the track from one end and moved sidewards slowly.
Iriatallation is time-consuming and troublesome.
Furthermore, as conventional winding wheels have a closed structurc, curtains and draperies have to be mounted on two extreme sides. Installation range and flexibility is restricted.
All this indicates that convcntional winding wheels still have problems in opcration and installation. There is room for improvoment.
S iTI~.~RI Y OF THE INVENTION
It is desirable to provide a winding wheel that has a drum of a conical peripheral surfacc with a slant slot formed thereon with two apertum on two ends to thread a cord towards two sides and a movable lid located on a lower side with two holes formed thereon in a biased angle to keep the cord in a confined location thereby enables the cord be moved and anchored without entangling.
It is also desirable to provide a winding wheel that has a pulley which has one side extending to form a worm with left teeth (or right teeth) for controlling positioning of the curtain when it is moved downwards.
t 5 It is furtber desirable to provide a movable anchor lug on an upper side of the winding wheel and a movable lid on a lower side of the winding wheel that may be lifted and extended to form an angle directing outwards to give the winding wheel open upper and lower spacea to wind the cord without obstruction.
It is also desirable to provide a movable anchor lug which is anchored on two ends to couple with a movable lid which is latched securely on a lower side such that a thro-point anchoring is fon,ned to enhance fastening of the winding wheel.
FIELD OF THE iNVEN"rrON
The present invention relates to an improved winding wheel and particularly to a winding wheel adopted for use on window coverings sucb as curtains, draperies, shades and the likes.
BACKGROUN OF THL YN''VLN'Y'YO]~
Window coverings such as curtains, draperies, shades and the likes usually are equippcd with a winding wheel for contt'olling a cord to open or close the window coverings. The winding wheel generally is installed on a front end, a rear end or a middle section of the curtain track, and is constructed in many different ways. FIGS.
I and 2 show a conventional winding wheel for mounting to a front end or a rear end of a curtain track. The winding wheel has a closed bottom end. As it does not have openings to allow a cord to pass through, a mounting seat must be installed on the track to hold the winding wheel. The mounting seat has a bottom section with openings formcd thereon to allow cords to pass through. The sidc plate of the winding wheel also has a notch for the cord to anchor and pass through (referring to FIG. 3). Such a design and construction is untidy and takes a lot of effort and more costs to install.
Moreover, the axle of conventional winding wheel set forth above usually is a fixed rivet. It is prone to break loose after using for a period of time. Zn additiory the winding wheel has two fixed support elements on two sides. When installing the winding wheel on the track, it should be coupled with the track from one end and moved sidewards slowly.
Iriatallation is time-consuming and troublesome.
Furthermore, as conventional winding wheels have a closed structurc, curtains and draperies have to be mounted on two extreme sides. Installation range and flexibility is restricted.
All this indicates that convcntional winding wheels still have problems in opcration and installation. There is room for improvoment.
S iTI~.~RI Y OF THE INVENTION
It is desirable to provide a winding wheel that has a drum of a conical peripheral surfacc with a slant slot formed thereon with two apertum on two ends to thread a cord towards two sides and a movable lid located on a lower side with two holes formed thereon in a biased angle to keep the cord in a confined location thereby enables the cord be moved and anchored without entangling.
It is also desirable to provide a winding wheel that has a pulley which has one side extending to form a worm with left teeth (or right teeth) for controlling positioning of the curtain when it is moved downwards.
t 5 It is furtber desirable to provide a movable anchor lug on an upper side of the winding wheel and a movable lid on a lower side of the winding wheel that may be lifted and extended to form an angle directing outwards to give the winding wheel open upper and lower spacea to wind the cord without obstruction.
It is also desirable to provide a movable anchor lug which is anchored on two ends to couple with a movable lid which is latched securely on a lower side such that a thro-point anchoring is fon,ned to enhance fastening of the winding wheel.
It is also desirable to form an opening on the to anchor deck of the winding wheel for threading the cord such that installation locations and scope of the winding wheel may be chosen easily without restrictions to match other control accessories of the curtain.
and also to facilitate fast installation, It is also desirable to provide a movable lid and a hidden axle to obtain tidy appearance and secured installation without breaking off.
Aocording to a first aspect of the invention there is provided an improved winding wheel, the winding wheel comprising: an anchor dock including a first side board and a second side board corresponding to each otbet' and having respeetively a housing opening; an axle having a worm gear formod on the periphery, a center hole for housing a shaft, and two struts extended from two ends to bc held in the housing openings; and a pulley bordered by a movable anchor lug on an upper side and a movable lid on a lower side that arc turnable by coupling a bolt on the side boards to fornl respectively an open space on the upper side and the lower side, having a wheel on one end containing a drum which has a conical peripheral surface, the drum having a slant slot whicb has two apertures on two ends to thread a cord and separate two ends of the cord on the left side and the right side to pass through biased holes formed on the movable lid to facilitate pulling of the cord in a positive direction and a reverse direction.
Moreover, the axle hole of the invention may bave a pointing ridge to match the axle so that the axle and the worm may be aligned accurately to keep the pulley on a horizontal level, and to allow the cord to be pulled evenly with less efforts.
and also to facilitate fast installation, It is also desirable to provide a movable lid and a hidden axle to obtain tidy appearance and secured installation without breaking off.
Aocording to a first aspect of the invention there is provided an improved winding wheel, the winding wheel comprising: an anchor dock including a first side board and a second side board corresponding to each otbet' and having respeetively a housing opening; an axle having a worm gear formod on the periphery, a center hole for housing a shaft, and two struts extended from two ends to bc held in the housing openings; and a pulley bordered by a movable anchor lug on an upper side and a movable lid on a lower side that arc turnable by coupling a bolt on the side boards to fornl respectively an open space on the upper side and the lower side, having a wheel on one end containing a drum which has a conical peripheral surface, the drum having a slant slot whicb has two apertures on two ends to thread a cord and separate two ends of the cord on the left side and the right side to pass through biased holes formed on the movable lid to facilitate pulling of the cord in a positive direction and a reverse direction.
Moreover, the axle hole of the invention may bave a pointing ridge to match the axle so that the axle and the worm may be aligned accurately to keep the pulley on a horizontal level, and to allow the cord to be pulled evenly with less efforts.
The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
ERMF DESCRIPTI N OF THE DRAWINGS
FIG. 1 is a perspective view of a conventional winding wheel.
r"TG. 2 is a schematic view of a convcntional winding wheel.
FIG. 3 is a schematic view of a conventional winding wheel winding a cord.
p'IG. 4 is an exploded view of the invention.
FIG. 5 is a perspective view of the invention.
FIG. 6 is a cross section of two side boards coupling together.
FIG. 7 is a schematic rear view of the pulley fastening and tbreading a cord FIG. 8 is a schematic rear view of the pulley fastening to a cord and the cord threading through the movable lid.
FIG. 9 is a schematic view of the cord winding the pulley on a is returning position.
FIG. 10 is a schematic front view of the invention after installation.
FIG. 11 is a schematic view of the anchor dock mounting to a track.
FIG. 12 is a schematic view of the anchor dock supported on three points.
GFSCRIPIjON OF THE PREFERRED EMBODIMENT
Referring to FIGS. 4 and 5, the winding wheel of the invention includes an anchor dock 1, an axle 2, a pulley 3, a movable anchor lug 4 and a movable lid S. The anchor dock 1 has a first side board 10 and a second side board 11 coupling with each other, and two housing openings 100 and 110 located in the centcr of an upper section thereof to eouple with stiuts 21, 22 on two sides of the axle 2. There is a pointing ridge 1100 formed on the upper side of the housing opening 110, and an arched notch 1000 formed respectively on two sides to couple together for housing a stem 300 extending from two sides of a worm 301ocated on one side of the pulley 3, and apertures 101 and 1 I 1 located on a bottom section, and two stub shafts 102 and 112 for coupling with the movable lid 5. The first side board 10 has latching lugs 103 and 104 located respectively on the upper right and lower left portions to couple with matching latch holes 1130 and 1140 formed on the second side board 11.
The first side board 10 further has a round opening 105 and an anchor arm 106 formed on the right side.
The anchor arm 106 has a round cavity 1060. The latching lugs 103 and 104 correspond respectively to jutting stubs 113 and 114 formed in the latch holcs 1130 and 1140, and the round opening ] 05 and round cavity 1060 eoffespond respectively to wedge rods 115 and 116 on the second side board 11 to form coupling (referring to FIG. 4 and FIG. 6).
Furthermore, The side boards 10 and 11 have respectively a concave section 107 and 117 formed on the upper left comcr to couple with a tubular element 40 of the movable anchor lug 4 through a bolt 400 so that the movable anchor lug 4 is turnable. Beyond the concave sections 107 and 117, there are respectively a brakc piece 108 and ]] 8 to press against a side plate 310 of a wheel 31 of the pulley 3.
The axle 2 has a worm gear 20 formed on the periphery to engage with a worm 30 formed on, an extended side of the pulley 3 (with teeth 301 of the worm 30 directing leftwards or rightwards), and a center hole 200 to allow a shaft to pass through. The axle 2 has two struts 21 and 22 extending from two sidcs to be housed in the housing openings 100 and 110. There is a pointing notch 201 formed on the upper peripherat side of the strut 22 corresponding to the pointing ridge 1100.
The pulley 3 has the worm 30 extending from one side thereof. The worm 30 has the teeth 301 to engage with the worm gear 20 formed in the middle of the periphery of the axle 2. The worm 30 has a stem 300 extending from two sides thereof to couple with the arched notches 1000 on two sides of the side boards 10 and a 1 in a turnable fashion. The pulley 3 has another side fom ng a wheel 31 for winding a cord 6. The wheel 31 has two side plates 310 pressing a lower end of the brake pieces 108 and 118 located on the left side of the side boards 10 and 11. The wheel 31 has a drum 311 of a conical periphernl sutface in the center which has a slant slot 3110 formed on the periphery with two apertures 3111 and 3112 on two ends to allow a middle section 60 of the cord 6 to pass through and form a knob for anchoring in the inner diameter of the drum 311. Then two ends 61 and 62 of the cord 6 may pass through two holes 510 and 511 formed in a biased manner on the movable lid 5 (as shown in FIG. 7). 'ltereby the positive and revcrse ends 61 and 62 of the cord 6 may be separated and extending towards two sides to wind around the drum neatly and smoothly without entangling.
The movable anchor lug 4 has one end fastening to a tubular element 40 to receive and engage with the bolt 400 so that the tubular element 40 becomes turnable. The left hand side of the tubular element 40 is extended to form an arched lid 42 and an arched support block 41 which has a holding trough 410 with an upward opening for anchoring to the track rim 70 on the top end of a curtain track 7.
The movable lid 5 has one side attaching to a barrel 50 which has a center hole 500 with two sides coupling with the stub shafts 102 and 112 of the side boards 10 and 11 so that the movable lid 5 becomes tumable. 'The movable lid 5 has another side extending to form a lid plate 51 which has a flange 5100 formed on the front end to move the lid 5 and two holes 510 and 511 formed on one surface at the front and rear side in a biased manner to allow the positive and reverse ends 61 and 62 of the cord 6 to thread through separately.
When in use (referring to FIGS. 8, 9 and 10), the housing openings 100 and 110 of the side boards 10 and 11 are coupled with the struts 21 and 22 of the axle 2, and the pointing ridge 1100 above the housing trough 110 serves as the reference base. The apertures 101 and 111 located on the lower section on the left and the right sides allow a rope 8 to pass through. The movable lid 5 is located in the middle section between the apertures 101 and 111. Thus the movable anchor lug 4 on the upper side and the movable lid 5 on the lower side may be lifted and extended to give the pulley 3 an open space at the upper and lower side so that the cord 6 may be wound or extended without obstruction. Once the cord 6 is wound, the lid plate 51 of the movable lid 5 holds the pulley 3 which has the cord wound thereon. The arched support block 41 on one end of the movable anchor lug 4, coupling with anchor arm 106 on the right hand side of the anchor dock 1, and the movable lid 5 at the bottom end may directly hold the anchor dock 1 on a desired location, and securely hold the anchor dock.l on the track rim 70 on the top end of the curtain track 7 to form a three-point support for the anchor dock 1(as shown in FIGS. 11 and 12).
ERMF DESCRIPTI N OF THE DRAWINGS
FIG. 1 is a perspective view of a conventional winding wheel.
r"TG. 2 is a schematic view of a convcntional winding wheel.
FIG. 3 is a schematic view of a conventional winding wheel winding a cord.
p'IG. 4 is an exploded view of the invention.
FIG. 5 is a perspective view of the invention.
FIG. 6 is a cross section of two side boards coupling together.
FIG. 7 is a schematic rear view of the pulley fastening and tbreading a cord FIG. 8 is a schematic rear view of the pulley fastening to a cord and the cord threading through the movable lid.
FIG. 9 is a schematic view of the cord winding the pulley on a is returning position.
FIG. 10 is a schematic front view of the invention after installation.
FIG. 11 is a schematic view of the anchor dock mounting to a track.
FIG. 12 is a schematic view of the anchor dock supported on three points.
GFSCRIPIjON OF THE PREFERRED EMBODIMENT
Referring to FIGS. 4 and 5, the winding wheel of the invention includes an anchor dock 1, an axle 2, a pulley 3, a movable anchor lug 4 and a movable lid S. The anchor dock 1 has a first side board 10 and a second side board 11 coupling with each other, and two housing openings 100 and 110 located in the centcr of an upper section thereof to eouple with stiuts 21, 22 on two sides of the axle 2. There is a pointing ridge 1100 formed on the upper side of the housing opening 110, and an arched notch 1000 formed respectively on two sides to couple together for housing a stem 300 extending from two sides of a worm 301ocated on one side of the pulley 3, and apertures 101 and 1 I 1 located on a bottom section, and two stub shafts 102 and 112 for coupling with the movable lid 5. The first side board 10 has latching lugs 103 and 104 located respectively on the upper right and lower left portions to couple with matching latch holes 1130 and 1140 formed on the second side board 11.
The first side board 10 further has a round opening 105 and an anchor arm 106 formed on the right side.
The anchor arm 106 has a round cavity 1060. The latching lugs 103 and 104 correspond respectively to jutting stubs 113 and 114 formed in the latch holcs 1130 and 1140, and the round opening ] 05 and round cavity 1060 eoffespond respectively to wedge rods 115 and 116 on the second side board 11 to form coupling (referring to FIG. 4 and FIG. 6).
Furthermore, The side boards 10 and 11 have respectively a concave section 107 and 117 formed on the upper left comcr to couple with a tubular element 40 of the movable anchor lug 4 through a bolt 400 so that the movable anchor lug 4 is turnable. Beyond the concave sections 107 and 117, there are respectively a brakc piece 108 and ]] 8 to press against a side plate 310 of a wheel 31 of the pulley 3.
The axle 2 has a worm gear 20 formed on the periphery to engage with a worm 30 formed on, an extended side of the pulley 3 (with teeth 301 of the worm 30 directing leftwards or rightwards), and a center hole 200 to allow a shaft to pass through. The axle 2 has two struts 21 and 22 extending from two sidcs to be housed in the housing openings 100 and 110. There is a pointing notch 201 formed on the upper peripherat side of the strut 22 corresponding to the pointing ridge 1100.
The pulley 3 has the worm 30 extending from one side thereof. The worm 30 has the teeth 301 to engage with the worm gear 20 formed in the middle of the periphery of the axle 2. The worm 30 has a stem 300 extending from two sides thereof to couple with the arched notches 1000 on two sides of the side boards 10 and a 1 in a turnable fashion. The pulley 3 has another side fom ng a wheel 31 for winding a cord 6. The wheel 31 has two side plates 310 pressing a lower end of the brake pieces 108 and 118 located on the left side of the side boards 10 and 11. The wheel 31 has a drum 311 of a conical periphernl sutface in the center which has a slant slot 3110 formed on the periphery with two apertures 3111 and 3112 on two ends to allow a middle section 60 of the cord 6 to pass through and form a knob for anchoring in the inner diameter of the drum 311. Then two ends 61 and 62 of the cord 6 may pass through two holes 510 and 511 formed in a biased manner on the movable lid 5 (as shown in FIG. 7). 'ltereby the positive and revcrse ends 61 and 62 of the cord 6 may be separated and extending towards two sides to wind around the drum neatly and smoothly without entangling.
The movable anchor lug 4 has one end fastening to a tubular element 40 to receive and engage with the bolt 400 so that the tubular element 40 becomes turnable. The left hand side of the tubular element 40 is extended to form an arched lid 42 and an arched support block 41 which has a holding trough 410 with an upward opening for anchoring to the track rim 70 on the top end of a curtain track 7.
The movable lid 5 has one side attaching to a barrel 50 which has a center hole 500 with two sides coupling with the stub shafts 102 and 112 of the side boards 10 and 11 so that the movable lid 5 becomes tumable. 'The movable lid 5 has another side extending to form a lid plate 51 which has a flange 5100 formed on the front end to move the lid 5 and two holes 510 and 511 formed on one surface at the front and rear side in a biased manner to allow the positive and reverse ends 61 and 62 of the cord 6 to thread through separately.
When in use (referring to FIGS. 8, 9 and 10), the housing openings 100 and 110 of the side boards 10 and 11 are coupled with the struts 21 and 22 of the axle 2, and the pointing ridge 1100 above the housing trough 110 serves as the reference base. The apertures 101 and 111 located on the lower section on the left and the right sides allow a rope 8 to pass through. The movable lid 5 is located in the middle section between the apertures 101 and 111. Thus the movable anchor lug 4 on the upper side and the movable lid 5 on the lower side may be lifted and extended to give the pulley 3 an open space at the upper and lower side so that the cord 6 may be wound or extended without obstruction. Once the cord 6 is wound, the lid plate 51 of the movable lid 5 holds the pulley 3 which has the cord wound thereon. The arched support block 41 on one end of the movable anchor lug 4, coupling with anchor arm 106 on the right hand side of the anchor dock 1, and the movable lid 5 at the bottom end may directly hold the anchor dock 1 on a desired location, and securely hold the anchor dock.l on the track rim 70 on the top end of the curtain track 7 to form a three-point support for the anchor dock 1(as shown in FIGS. 11 and 12).
Claims (10)
1. An improved winding wheel, the winding wheel comprising:
an anchor dock including a first side board and a second side board corresponding to each other and having respectively a housing opening;
an axle having a worm gear formed on the periphery, a center hole for housing a shaft, and two struts extended from two ends to be held in the housing openings; and a pulley bordered by a movable anchor lug on an upper side and a movable lid on a lower side that are turnable by coupling a bolt on the side boards to form respectively an open space on the upper side and the lower side, having a wheel on one end containing a drum which bas a conical peripheral surface, the drum having a slant slot which has two apertures on two ends to thread a cord and separate two ends of the cord on the left side and the right side to pass through biased holes formed on the movable lid to facilitate pulling of the cord in a positive direction and a reverse direction.
an anchor dock including a first side board and a second side board corresponding to each other and having respectively a housing opening;
an axle having a worm gear formed on the periphery, a center hole for housing a shaft, and two struts extended from two ends to be held in the housing openings; and a pulley bordered by a movable anchor lug on an upper side and a movable lid on a lower side that are turnable by coupling a bolt on the side boards to form respectively an open space on the upper side and the lower side, having a wheel on one end containing a drum which bas a conical peripheral surface, the drum having a slant slot which has two apertures on two ends to thread a cord and separate two ends of the cord on the left side and the right side to pass through biased holes formed on the movable lid to facilitate pulling of the cord in a positive direction and a reverse direction.
2. The improved winding wheel of claim 1, wherein the sides boards have respectively a latch lug extended from one side to couple with a jutting stub located in a latch hole formed thereon.
3. The improved winding wheel of claim 1, wherein the second side board has a pointing ridge located on an upper side of the periphery of the housing opening,
4. The improved winding wheel of claim 1, wherein one strut has a pointing notch formed on the peripheral side.
5. The improved winding wheel of claim 1, wherein the pulley has a worm extending from one side thereof.
6. The improved winding wheel of claim 5, wherein the warm has teeth to engage with and drive the worm gear of the axle.
7. The improved winding wheel of claim 6, wherein the teeth direct to the left side or the right side.
8. The improved winding wheel of claim 1, wherein the movable anchor lug has one end fastening to a tubular element to pivotally couple with the bolt to become turnable, the tubular element having a connection block on a left side which is extended from two ends to form an arched lid.
9. The improved winding wheel of claim 8, wherein the tubular element is extended from one side to form an archcd support block which has a holding trough directing upwards.
10. The improved winding wheel of claim 1, wherein the movable lid has one side attaching to a barrel which has a center hole and a lid plate extended from another side which has a flange formed on a front end and two holes formed on one surface at the front and the rear side in a biased manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2472856 CA2472856C (en) | 2004-06-29 | 2004-06-29 | Improved winding wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2472856 CA2472856C (en) | 2004-06-29 | 2004-06-29 | Improved winding wheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2472856A1 CA2472856A1 (en) | 2005-12-29 |
| CA2472856C true CA2472856C (en) | 2007-12-04 |
Family
ID=35589013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2472856 Expired - Fee Related CA2472856C (en) | 2004-06-29 | 2004-06-29 | Improved winding wheel |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2472856C (en) |
-
2004
- 2004-06-29 CA CA 2472856 patent/CA2472856C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2472856A1 (en) | 2005-12-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20180629 |