1. A device for closing an opening, comprising:
a frame;
a cover articulated relative to the frame around a first horizontal axis by at least one first hinge between an open position and a closed position, the first hinge comprising a first cover knuckle and a cooperating first frame knuckle;
a locking device having a locked configuration in which the cover is in a first position relative to the frame and is maintained in a locked-open position, and an unlocked configuration in which the cover is in a second position relative to the frame, wherein the cover is configured to be pivoted around the first axis,
wherein the first hinge is configured to permit pivoting of the cover, while bearing on the frame, around a second axis that extends substantially perpendicularly relative to the first axis and horizontally in a mounted condition of the device, and wherein the cover is configured to be moved from the first position relative to the frame toward the second position relative to the frame and vice versa by pivoting the cover around the second axis,
wherein the cover is articulated to the frame by a second hinge comprising a second cover knuckle and a corresponding second frame knuckle, and wherein the locking device is formed by the second hinge, which is configured to lock and unlock the cover in its open position by displacement of the second cover knuckle relative to the second frame knuckle in a substantially radial direction relative to the first axis.
2. A device according to claim 1, wherein the device defines a plane of gravity containing the center of gravity of the cover, extending perpendicularly to the first axis and intersecting the first axis at a reference point, the reference point and the second axis defining a first distance, wherein the cover has an end point, which defines a maximum lever arm relative to the second axis, measured along the first axis, and wherein a second distance, measured along the first axis between the end point and the second axis, is longer than the first distance.
3. A device according to claim 2, wherein the second distance is longer than three times the first distance.
4. A device according to claim 2, wherein the first distance is shorter than a third distance between the second hinge and the second axis.
5. A device according to claim 2, wherein, relative to the second axis, the reference point and the second hinge are disposed on a same side of the first axis.
6. A device according to claim 1, wherein the second hinge is configured to be locked by displacement of the second cover knuckle substantially vertically downward in the mounted condition of the device.
7. A device according to claim 6, wherein the first and second frame knuckles are formed by seats that are upwardly open in the mounted condition of the device, and wherein the first and second cover knuckles are formed by pivots connected to the cover.
8. A device according to claim 7, wherein the seat of the second hinge has a depth greater than a depth of the seat of the first hinge, measured vertically relative to the first axis.
9. A device according to claim 8, wherein the seat of the first hinge is provided with a bottom wall on which the first cover knuckle of the first hinge bears, and wherein the seat of the second hinge is provided with an opening and a blocking surface configured to cooperate with the pivot of the second hinge when the second hinge is in its locked position.
10. A device according to claim 1, wherein the cover has a circular general shape.
11. A device according to claim 1, wherein the cover has a triangular general shape and the first hinge and the locking device are disposed on a same side of the triangular shape.
12. A device according to claim 11, wherein the triangle is a right triangle, the same side of the triangle being one side of the right angle of the triangle, and wherein the locking device is situated closer to the other side of the right angle than the first hinge.
13. A device according to claim 1, wherein the cover is a sealing lid.
14. A device according to claim 1, wherein the locked-open position and the closed position define an angle of substantially 90\xb0 between one another.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. An aqueous contact lens cleaning composition comprising:
a water soluble polymer having a molecular weight greater than 1000 daltons and including a plurality of carboxylate groups in one of an acid form and a salt form;
an amphoteric surfactant;
a non-ionic surfactant;
a buffering agent;
an anti-microbial agent;
water; and
wherein the cleaning composition has a pH of from about 6 to about 8 and a viscosity from about 10 to about 200 cps.
2. The cleaning composition of claim 1, wherein:
the water soluble polymer is one of carboxymethyl cellulose and polyacrylic acid;
the amphoteric surfactant is cocoamidopropyl betaine;
the non-ionic surfactant is polyoxyethylene (10) isooctylphenyl ether;
the buffering agent is a mixture of boric acid and sodium borate; and
the anti-microbial agent is a mixture of methylparaben and disodium edetate.
3. The cleaning composition of claim 2, wherein:
the carboxylmethyl cellulose is present in an amount of 0.5 to 5.0 weight percent;
the cocoamidopropyl betaine is present in an amount of 0.1 to 2.0 weight percent;
the polyoxyethylene (10) isooctanphenyl ether is present in an amount of 0.1 to 2.0 weight percent;
the boric acidsodium borate buffer is present in an amount of 0.2 to 1.5 weight percent;
the methylparaben is present in an amount of 0.1 to 0.3 weight percent and the disodium edetate is present in an amount of 001 to 0.15 weight percent; and
water is present in an amount of 89.05 to 98.99 weight percent.
4. The cleaning composition of claim 1, further including:
a viscosity building agent.
5. The cleaning composition of claim 1, wherein the composition is free of abrasive particles.
6. A method of actively preventing the redeposition of deposits and debris during a contact lens cleaning operation, the method comprising:
applying an anti-redepositioncleaning composition to the lens, the composition including:
a water soluble polymer having a molecular weight greater than 1000 daltons and including a plurality of carboxylate groups in one of an acid form and a salt form;
an amphoteric surfactant;
a non-ionic surfactant;
a buffering agent;
an anti-microbial agent;
water; and wherein the cleaning composition has a pH of from about 6 to about 8 and a viscosity from about 10 to about 200 cps;
rubbing the cleaning composition over a surface of the lens to reduce deposits and debris present on the surface of the lens, the water soluble polymer acting as a redeposition agent to prevent redeposition of deposits and debris on the lens; and
rinsing the lens to remove solubilized soils and remaining cleaning composition from the surface of the lens.
7. The method of claim 6, wherein:
the water soluble polymer is one of carboxymethyl cellulose and polyacrylic acid;
the amphoteric surfactant is cocoamidopropyl betaine;
the non-ionic surfactant is polyoxyethylene (10) isooctylphenyl ether;
the buffering agent is a mixture of boric acid and sodium borate; and
the anti-microbial agent is a mixture of methylparaben and disodium edetate.
8. The method of claim 7, wherein:
the carboxylmethyl cellulose is present in an amount of 0.5 to 5.0 weight percent;
the cocoamidopropyl betaine is present in an amount of 0.1 to 2.0 weight percent;
the polyoxyethylene (10) isooctanphenyl ether is present in an amount of 0.1 to 2.0 weight percent;
the boric acidsodium borate buffer is present in an amount of 0.2 to 1.5 weight percent;
the methylparaben is present in an amount of 0.1 to 0.3 weight percent and the disodium edetate is present in an amount of 001 to 0.15 weight percent; and
water is present in an amount of 89.05 to 98.99 weight percent.
9. The method of claim 6, wherein the composition is free of abrasive particles.
10. A method of passively preventing the redeposition of deposits and debris while cleaning a surface of a contact lens, the method comprising:
placing the contact lens in an anti-redepositioncleaning composition including:
a water soluble polymer having a molecular weight greater than 1000 daltons and including a plurality of carboxylate groups in one of an acid form and a salt form;
an amphoteric surfactant;
a non-ionic surfactant;
a buffering agent;
an anti-microbial agent;
water; and wherein the cleaning composition has a pH of from about 6 to about 8 and a viscosity from about 10 to about 200 cps;
allowing a predetermined time for the passive removal of deposits and debris present on the lens; and
removing the lens from the cleaning solution.
11. The method of claim 10, further including:
rinsing the contact lens with a solution subsequent to removing the contact lens from the cleaning composition.
12. The method of claim 10, wherein:
the water soluble polymer is one of carboxymethyl cellulose and polyacrylic acid;
the amphoteric surfactant is cocoamidopropyl betaine;
the non-ionic surfactant is polyoxyethylene (10) isooctylphenyl ether;
the buffering agent is a mixture of boric acid and sodium borate; and
the anti-microbial agent is a mixture of methylparaben and disodium edetate.
13. The method of claim 10, wherein:
the carboxylmethyl cellulose is present in an amount of 0.5 to 5.0 weight percent;
the cocoamidopropyl betaine is present in an amount of 0.1 to 2.0 weight percent;
the polyoxyethylene (10) isooctanphenyl ether is present in an amount of 0.1 to 2.0 weight percent;
the boric acidsodium borate buffer is present in an amount of 0.2 to 1.5 weight percent;
the methylparaben is present in an amount of 0.1 to 0.3 weight percent and the disodium edetate is present in an amount of 001 to 0.15 weight percent; and
water is present in an amount of 89.05 to 98.99 weight percent.
14. A method of suspending deposits and debris contained on a surface of a contact lens, the method comprising:
applying an anti-redepositioncleaning agent to the lens, the agent including:
a water soluble polymer having a molecular weight greater than 1000 daltons and including a plurality of carboxylate groups in one of an acid form and a salt form;
an amphoteric surfactant;
a non-ionic surfactant;
a buffering agent;
an anti-microbial agent;
water; and wherein the cleaning composition has a pH of from about 6 to about 8 and a viscosity from about 10 to about 200 cps;
rubbing the agent over a surface of the lens to reduce deposits and debris present on the surface of the lens by solubilizing the deposits and debris with the ampthoteric and non-ionic surfactants;
preventing the redeposition of the solubilized deposits and debris using the water soluble polymer as an inhibitor to the deposition of the solubilized deposits and debris on the surface of the lens;
rinsing the lens to remove solubilized deposits and debris and remaining cleaning composition from the surface of the lens.
15. The method of claim 14, wherein:
the water soluble polymer is one of carboxymethyl cellulose and polyacrylic acid;
the amphoteric surfactant is cocoamidopropyl betaine;
the non-ionic surfactant is polyoxyethylene (10) isooctylphenyl ether;
the buffering agent is a mixture of boric acid and sodium borate; and
the anti-microbial agent is a mixture of methylparaben and disodium edetate.
16. The method of claim 14, wherein:
the carboxylmethyl cellulose is present in an amount of 0.5 to 5.0 weight percent;
the cocoamidopropyl betaine is present in an amount of 0.1 to 2.0 weight percent;
the polyoxyethylene (10) isooctanphenyl ether is present in an amount of 0.1 to 2.0 weight percent;
the boric acidsodium borate buffer is present in an amount of 0.2 to 1.5 weight percent;
the methylparaben is present in an amount of 0.1 to 0.3 weight percent and the disodium edetate is present in an amount of 001 to 0.15 weight percent; and
water is present in an amount of 89.05 to 98.99 weight percent.