This invention relates to shade systems and mechanisms and methods for assisting in the movement of the shade system. In particular, in accordance with one embodiment, the invention relates, in a shade system with a bracket supporting a shade storage roll, to a modular anti-reversible power spring apparatus including a biasing member and a housing with a receiver end and a connector end where the housing encloses the biasing member and the receiver end and the connector end contain the biasing member within the housing. A connector device is connected with the housing and a receiver device is connected with the housing where the connector is connectable with a receiver and where the receiver is connectable with a connector.
A difficulty arises with the operation of shades for windows, doors and the like. In particular, shade systems include shade rolls to which the shade is attached. The shade is rolled onto the shade roll and dispensed from the roll and taken up by the roll as required. A major difficulty is caused by the requirements to keep the shade system small enough to not be obtrusive and to fit in the window or door space while still enabling the easy operation and movement of the shade. Motors are utilized to assist the movement of the shade but the weight of the shade can require very large, noisy and expensive motors.
Prior art devices abound that provide assistance to motors and to the operation of shade systems. In particular, roll type shades, curtains, and doors can be counterbalanced as has been known in the art. In Erpenbeck, U.S. Pat. No. 4,009,745, a window shade support roller having an improved spring motor construction and method of manufacture includes a spring retaining structure which holds a driving spring and a spear structure having an integral spear. The spear structure and the spring retaining structure cooperate together, and with a ball, to form a ball clutch mechanism. The spring retaining structure has ball-receiving recesses with canting floors which simplify assembly. Assembly steps include inserting balls into the spring retaining structure, inserting the spear structure into the spring retaining structure, inserting a dowel into the spear structure, positioning a spring around the dowel, and inserting one end of such spring between portions of the spring retaining structure, which uniquely capture and retain the end without other securement, for torsional winding of the spring. However this device must be mounted horizontally so gravity can move the balls in the channel of the ratchet surface arrangement. If the device is mounted vertically, such that there is no force from gravity the balls will not move in the channel.
In U.S. Pat. Nos. 6,283,192 and 6,957,683 to Toti, a spring drive system for window covers is disclosed which includes a so-called flat spring drive and the combination whose elements are selected from a group which includes (1) a band transmission which provides varying ratio power transfer as the cover is opened and closed; (2) a gear system selected from various gear sets which provide frictional holding force and fixed power transfer ratios; and (3) a gear transmission which provides fixed ratio power transfer as the cover is opened or closed. The combination permits the spring drive force at the cover to be tailored to the weight and/or compression characteristics of the window cover such as a horizontal slat or pleated or box blind as the cover is opened and closed. This art discusses the use of multiple drums with flat type springs but does not address the issue of possible back winding the spring.
In U.S. Pat. No. 6,648,050 to Toti, a spring drive system useful for window covers is disclosed, which comprises one or more coil spring drives or flat spring drives and the combination whose elements are selected from one or more of a group which includes (1) a band or cord transmission which provides varying ratio power transfer as the cover is opened and closed; (2) gear means comprising various gear sets which provide frictional holding force and fixed power transfer ratios; (3) a gear transmission which provides fixed ratio power transfer as the cover is opened or closed; (4) crank mechanisms; (5) brake mechanisms; and (6) recoiler mechanisms. The combination permits the spring drive force to be tailored to the weight and/or compression characteristics of an associated window cover such as a horizontal slat or pleated or box blind as the cover is opened and closed.
In U.S. Pat. No. 6,659,156 to Wen et al., a screw transmission mechanism for a motor-driven blind is constructed to include a driving unit, and at least one cord roll-up unit controlled by the driving unit to lift/lower or tilt the slats of the motor-driven Venetian blind. Each cord roll-up unit includes an amplitude modulation set controlled by the driving unit to lift/lower the slats and bottom rail of the Venetian blind, a frequency modulation set for rotation with the amplitude modulation set to tilt the slats of the Venetian blind, and a linkage adapted to control connection between the frequency modulation set and the amplitude modulation set.
In U.S. Pat. No. 6,854,503 to Cross et al., the invention includes an unbalanced horizontal blind with a spring means to provide a lifting or retraction force for the slats of the blinds. A brake means prevents undesired movement of the slats that would otherwise result from the continuous retraction force of the spring means when the slats are set in a desired position. Controls for the release of the brake means and tilting are also provided in an embodiment of a blind of the invention. An embodiment of the invention permits the blind to be operated by a single wand that can be used to either raise the slats or tilt the slats. This eliminates the need for a loose cord or bead chain that would traditionally be used as the user interface for controlling the movement of the slats of the blind.
Despite these efforts, the art is still missing a counter balancing system that is easily adjustable such that counter balances may be added or deleted as the circumstances require and as they change. That is, all the prior art of which Applicants are aware are fixed systems or complex adjustable systems that are bulky and hard to manipulate. At best prior art systems can accommodate small adjustments but major changes in the weight of the shade to be moved require total replacement of existing counter balances.
Another missing element in the prior art is a simple system for the prevention of back winding of the counter balance springs. For example, if some element of a prior art system was changed, like a battery or batteries, and then the shade was rehung partially deployed, this can result in a reverse wind of the counter balance spring when the motor moves the shade up to the fully open position. This is not desirable since it can, and often does, damage the counter balance systems in the prior art.
The cross referenced application goes a long way to eliminating the prior art problems but others still remain. It has been determined that the cross referenced housing limits the number of biasing members by its own dimensions. That is, while the housing may contain multiple biasing members only a certain definite number may be contained in any one preconstructed housing.
Further, in order to add or delete biasing members, the entire group of biasing members and the entire housing must be removed, the housing opened, the biasing member(s) added or removed, and then the housing resealed and reinserted for operational use.
Further, there is no way provided by the prior art to add additional housings within the system and, at the same time, ensure that the additions are secure with each other and within the system.
Thus, it is an object of this invention to provide a counter balance system and method that is modular and that is easy to install and adjust. Further it is an objective of the invention to provide a counter balance system that does not back wind and can not back wind during operation of a shade system.
Accordingly, according to one embodiment in a shade system with a bracket supporting a shade storage roll, a modular anti-reversible power spring apparatus includes a biasing member and a housing with a receiver end and a connector end where the housing encloses the biasing member and together the housing, the receiver end and the connector end contain the biasing member within the housing. A connector is connected with the housing and a receiver is connected with the housing where the connector is connectable with a receiver and where the receiver is connectable with a connector.
Terms used herein are given their common and ordinary meaning as known by those of ordinary skill in the art. “Modular” is used to describe a device that includes identical or nearly identical attributes such as form and dimension, for example only, such that one may be added to and removed from another, for example only, in a simple, predicable manner. “Connector” and “receiver” describe structures that cooperate together to hold two items together. Likewise “female connector” and “male connector” describe structures designed to cooperate with each other to secure one to the other. Further, “biasing member” describes a device that can exert pressure in a system to move it or resist movement, for example only, such as a spring, for example only and not by way of limitation.
In one aspect of the invention, a second housing enclosing a second biasing member is provided and a connector on one housing connects with a receiver on the other housing such that the two housings are locked together.
In another aspect, the invention further includes a support connected with the bracket, such that the support does not move. The support is also connected with the biasing member within the housing. A first end cap and a second end cap are provided where one end cap is connected to the shade storage roll at each end of the shade storage roll and also to the support such that the first end cap and the second end cap are held stationary along with the support but the shade storage roll is free to rotate about the end caps. Further, a connector is connected with the first end cap and a receiver is connected with the second end cap where, again, the connector is connectable with a receiver and the receiver is connectable with a connector.
As used herein, the term “connectable” means “capable of being connected” and describes a structure or combination of structures that provide the ability, when combined, to result in joining together, at least temporarily, two or more separate structures.
In one aspect, the biasing member further includes a first end and a second end where the first end of the biasing member is connected with the housing and where the second end of the biasing member is connected with the support. In a further aspect, the support has a length and the housing has a length and the support is conformed in length to approximately the length of the housing.
In one aspect of the invention, the shade storage roll includes a female connector and the housing includes a male connector and the male connector is conformed to connect with the female connector and to lock the housing with the shade storage roll.
In another aspect, the connection of the second end of the biasing member with the support is such that the biasing member is held in place when the housing rotates in one direction and is released when the housing rotates in an opposite direction. In a further aspect, the support includes a groove that accepts the second end and holds the second end against movement when the storage roll is rotated in one direction but which allows passage of the second end past the groove when the storage roll is rotated in the opposite direction.
In another aspect, the biasing member is selected from a group consisting of: a spring and a coiled flat spring.
According to another embodiment of the invention, in a shade system with a bracket supporting a shade storage roll, a modular anti-reversible power spring apparatus includes a biasing member and a housing with a receiver end and a connector end where the housing encloses the biasing member and the receiver end and the connector end contain the biasing member within the housing. A connector is provided that is connected with the receiver end and a receiver is provided that is connected with the connector end where the connector is connectable with a receiver and where the receiver is connectable with a connector. A support is connected with the bracket, such that the support does not move, and where the support is also connected with the biasing member within the housing. A first end cap and a second end cap are provided where one end cap is connected to the shade storage roll at each end of the shade storage roll and to the support such that the first end cap and the second end cap are held stationary with the support and the shade storage roll is free to rotate about the end caps. And a connector is connected with the first end cap and a receiver is connected with the second end cap where the first end cap connector is conformed to connect with the connector end receiver and the second end cap receiver is conformed to connect with the receiver end connector.
In one aspect of this invention, it further includes more than one housing with a biasing member where each housing is conformed to connect with at least one additional housing.
In another aspect, the biasing member further includes a first end and a second end where the first end of the biasing member is connected with the housing and where the second end of the biasing member is connected with the support. In one aspect, the support has a length and the housing has a length and the support is conformed in length to approximately the length of the housing. In a further aspect, the shade storage roll includes a female connector and the housing includes a male connector and the male connector is conformed to connect with the female connector and to lock the housing with the shade storage roll.
In a further aspect, the connection of the second end of the biasing member with the support is such that the biasing member is held in place when the housing rotates in one direction and is released when the housing rotates in an opposite direction. In another aspect, the support includes a groove that accepts the second end and holds the second end against movement when the storage roll is rotated in one direction but which allows passage of the second end past the groove when the storage roll is rotated in the opposite direction.
According to another embodiment of the invention, in a shade system with a bracket supporting a shade storage roll, a modular anti-reversible power spring method includes the steps of:
a. providing a biasing member; a housing with a receiver end and a connector end where the housing encloses the biasing member and the receiver end and the connector end contain the biasing member within the housing; a connector connected with the housing; and a receiver connected with the housing where the connector is connectable with a receiver and where the receiver is connectable with a connector; and
b. connecting the housing with the shade storage roll.
In another aspect of this invention the method includes the steps of”
a. providing a support connected with the bracket, such that the support does not move, and also connected with the biasing member within the housing; a first end cap and a second end cap where one end cap is connected to the shade storage roll at each end of the shade storage roll and to the support such that the first end cap and the second end cap are held stationary with the support and the shade storage roll is free to rotate about the end caps; and a connector connected with the first end cap and a receiver connected with the second end cap where the first end cap connector is conformed to connect with a receiver and the second end cap receiver is conformed to connect with a connector; and
b. connecting an end cap with a housing.
In one aspect, the biasing member further includes a first end and a second end where the first end of the biasing member is connected with the housing and where the second end of the biasing member is connected with the support such that the biasing member is held in place when the housing rotates in one direction and is released when the housing rotates in an opposite direction.
In another aspect, the method includes the steps of:
a. providing more than one housing with a biasing member where each housing is conformed to connect with at least one additional housing; and
b. connecting each housing with at least one additional housing.
Other objects, features and advantages of the present invention will become more fully apparent from the following detailed description of the preferred embodiment, the appended claims and the accompanying drawings in which:
The preferred embodiment of the present invention is illustrated by way of example in
Referring now to
Still referring to
Finally,
Referring now to
Further, it can be seen that support 20 is conformed, according to a preferred embodiment, to pass through first end cap 34 and housings 38 and to connect with power out put shaft 46. Again, because support 20 is fixed and does not move, and because motor assembly 24 is connected with storage roll 18, which is allowed to move, when operated power out put shaft 46 turns storage roll 18.
Importantly,
Referring now to
Second end 54 fits within groove 58 on support 20. Importantly, second end 54 and groove 58 cooperate together to prevent movement between them when housing 38 rotates with storage roll 18 in one direction. However, second end 54 is released from groove 58 when rotated in the opposite direction as is more clearly seen from
Another important feature of the present invention is shown in
Referring now to
Slot 56 in housing 38 is clearly shown as is first end 52 of biasing member 44. Also shown are second end 54 of biasing member 44 formed, for example into a rounded end and set within groove 58 of support 20. In this position, when rotated in the direction of direction arrow 60 the second end 54 is held against movement by groove 58 in stationary support 20 and the biasing member 44 is wound up. When rotated in the direction of direction arrow 62, the opposite direction from arrow 60, the second end 54 ramps over the top of groove 58 and unwinds. This feature of the invention prevents reverse or back winding of the biasing member 44.
Referring now to
In whatever length, the important feature of the invention is that housings 38 and the single enclosed biasing member 44 may easily be added to or removed from the storage roll 18. This is a tremendous advantage over the prior art which requires complicated removal of a large housing, if present, opening the housing, adding or removing biasing members 44 re-closing and re-installing the housing. According to the present invention, counterbalance tension as provided by the biasing members 44 may be accurately and easily adjusted to fit the needs. Further repair and replacement is just as easily accommodated.
The description of the present embodiments of the invention has been presented for purposes of illustration, but is not intended to be exhaustive or to limit the invention to the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. As such, while the present invention has been disclosed in connection with an embodiment thereof, it should be understood that other embodiments may fall within the spirit and scope of the invention as defined by the following claims.
This application is a Continuation in Part of U.S. patent application Ser. No. 12/799,879 filed May 4, 2010 entitled “Anti-Reversible Power Spring Apparatus and Method”. The Applicants hereby claim the benefit of the non-provisional application under 35 U.S.C. §120. The entire content of the non-provisional application is incorporated herein by this reference.
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Number | Date | Country | |
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Number | Date | Country | |
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Parent | 12799879 | May 2010 | US |
Child | 12927212 | US |