Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Reexamination Certificate
2001-03-08
2001-09-11
Nappi, Robert E. (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
C318S265000, C318S467000, C318S282000, C296S112000, C296S115000, C296S110000
Reexamination Certificate
active
06288511
ABSTRACT:
FIELD OF THE INVENTION
This invention relates generally to automobile convertible tops, and more particularly to an automobile convertible top that can be opened and closed automatically.
BACKGROUND OF THE INVENTION
In the field of automobile design, convertible tops have been employed to provide the consumer with versatile styling. Most people are familiar with manual convertible tops, which are latched and lowered by hand. However, over the years, many different types of automatic and semi-automatic convertible tops have been developed. Generally, these convertible tops utilize one or more motors to move the various linkages and other movable elements from an extended (or top closed) position to a retracted (top open) position. Through the aid of motorized movement, the user can raise and lower the convertible top more easily.
However, simply providing for motorized movement of the convertible top is not enough. For example, there are known motorized convertible tops that provide for limit sensors on the elements to determine whether the elements are in the “full retracted” or “full extended” position. However, such systems provide no information as to whether the linkage elements are simply near, rather than being at, one of the two fully articulated positions or not. As a result, these known systems, while being capable of causing the convertible top to be opened and closed automatically, require each sensed element to reach an extreme position before commencing the movement of the next element in the sequence necessary to accomplish the desired movement of the convertible top. Thus, it would be advantageous if a motorized convertible top system could allow simultaneous movement of various elements so as to accomplish the opening and closing of the convertible top using a series of movements that are more fluid and continuous and that both reduce the time necessary to accomplish the movements as well as improving the aesthetic appearance of the movements.
Another disadvantage of known motorized convertible tops is the fact that the elements may bind as the movements are sequenced, increasing the load on the motors and risking damage to the motors or elements as the motors try to “force” the elements to move. Especially when trying to accomplish simultaneous movement of multiple elements, the fact that one element may be slightly inhibited in its movement means that the other moving elements will reach their desired position sooner than will the binding element. Allowed to continue uncorrected, this misalignment of elements can result in the convertible top being cocked in an undesirable position and may cause damage to the convertible top mechanism. Therefore, it would be desirable if there were some way to monitor the movement of critical elements while they are moving simultaneously so that remedial action can be taken in the event that a misalignment situation arises. The remedial action could include stopping the movement of other elements while the binding element is still moved, allowing the slower, binding element to “catch up” with the other elements. The remedial action could also include reversing the movement of some elements in order to realign the convertible top, and, once realignment is achieved, resuming normal movement of the elements. The remedial action could also include detecting an unrecoverable misalignment and shutting down the motors before the motors are overburdened.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a system and method for lowering and raising an automobile convertible top where motive means, such as electric motors, move the various structural elements of the convertible top. Sensors are associated with the convertible top's structural elements whereby the system determines the instantaneous position of the various structural elements as they are moved and commands further movement based upon the sensed positions of the elements. One advantage of the present invention is that the structural elements can be moved simultaneously to achieve a more fluid sequence of movements and to decrease the amount of time it takes to extend and retract the convertible top.
Another disadvantage is that, because the instantaneous positions of the various structural elements are being monitored, the system and method are capable of instituting remedial action in the event that the structural elements become misaligned during the sequence of movements. A further important feature of the presently preferred embodiment is that the monitoring of the convertible top's structural elements is accomplished through the use only a few sensors, thereby simplifying the assembly of the system and reducing the cost associated therewith. Another feature of the presently preferred embodiment is that the system and method are capable of diagnosing failures within the system, and generating failure indications, whereby the automobile owner or a qualified service person can interpret the error information and perform the necessary repairs.
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Alderton, IV George A.
Berland Kerry S.
DiCesare Samuel
Helms James M.
Kruse Richard H.
ASC Incorporated
Harness & Dickey & Pierce P.L.C.
Leykin Rita
Nappi Robert E.
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