Article dispensing – With discharge assistant – Fluid pressure
Reexamination Certificate
1998-10-23
2001-07-24
Ellis, Christopher P. (Department: 3651)
Article dispensing
With discharge assistant
Fluid pressure
C221S095000, C221S165000, C227S119000, C227S107000, C227S109000, C227S135000
Reexamination Certificate
active
06264063
ABSTRACT:
TECHNICAL FIELD OF INVENTION
This invention relates generally to fastener delivery systems and, more particularly, to an orientation maintained fastener delivery system and method.
BACKGROUND OF THE INVENTION
Fastener delivery systems are generally used to retrieve fasteners from a storage area and transport the fasteners to an automatic fastener installation device. One example of a fastener delivery system includes a feeder bowl, a tube, and a fastener injection device. The feeder bowl generally contains a large number of loosely contained fasteners. The fasteners exit the feeder bowl and enter the tube through a generally funnel-shaped device. A pneumatic power supply is generally used to transport the fasteners through the tube to the fastener injection device. The fastener injection device manipulates the fastener into an orientation capable of being received by the automatic fastener installation device and delivers the fastener to the automatic fastener installation device.
In mass production, several feeder bowls are often used so that a variety of sizes or types of fasteners may be transported to the fastener installation device to meet specific fastener installation requirements. For example, one feeder bowl containing one size of fastener may be replaced with another feeder bowl containing a different size fastener so that the same tube and injector can be used to accommodate a variety of fastener installation requirements. Accordingly, the tube and fastener injection device are generally designed to accommodate a variety of sizes or types of fasteners.
However, because the tube and fastener injection device are designed to accommodate a variety of sizes or types of fasteners, the orientation of the fastener is uncontrolled until the fastener reaches the fastener injection device. For example, the tube is generally designed having a diameter large enough to accommodate the largest sized fastener out of a variety of sizes or types of fasteners. Thus, the fastener is allowed to tumble loosely through the tube during transport from the feeder bowl to the fastener injection device. Once the fastener reaches the fastener injection device, the fastener must be manipulated into an orientation acceptable for being received by the fastener installation device and for installation.
However, manipulating each fastener after reaching the fastener injection device is time consuming and inefficient. For example, the fastener injection device may be unable to or incapable of manipulating the fastener into an acceptable installation orientation. As a result, the fastener must be purged from the fastener injection device and another fastener sent from the feeder bowl to complete the fastener installation sequence.
SUMMARY OF THE INVENTION
Accordingly, a need has arisen for an improved fastener delivery system that provides increased fastener orientation control. The present invention provides an improved fastener delivery system that addresses shortcomings of prior fastener delivery systems and increases fastener orientation control.
According to one embodiment of the invention, a fastener delivery system includes an escapement operable to retain a fastener in a desired orientation and deliver the fastener in the desired orientation to a transfer system. The fastener delivery system also includes an injector operable to receive the fastener in the desired orientation from the transfer system and deliver the fastener in the desired orientation to a fastener installation device. The fastener delivery system further includes a transfer system operable to provide uninterrupted transfer of the fastener in the desired orientation from the escapement to the injector.
According to another embodiment of the invention, a method for delivering a fastener to a fastener installation device includes positioning the fastener in a desired orientation in an escapement and transferring the fastener in the desired orientation from the escapement to a transfer system. The method also includes transporting the fastener without interruption in the desired orientation through the transfer system to an injector. The method further includes delivering the fastener in the desired orientation to the fastener installation device using the injector.
The invention provides several technical advantages. For example, in one embodiment of the invention, maintaining a desired fastener orientation throughout the fastener delivery system provides greater efficiency than prior fastener delivery system by decreasing the amount of time required to manipulate the fastener into an acceptable installation orientation. In the same embodiment, the fastener delivery system provides greater flexibility than prior fastener delivery systems by accommodating a variety of sizes and types of fasteners.
Other technical advantages will be readily apparent to one skilled in the art from the following figures, descriptions, and claims.
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Ferenczi Laszlo
Turner Mark A.
Woods James E.
Baker & Botts L.L.P.
Ellis Christopher P.
Mackey Patrick
Vought Aircraft Industries, Inc.
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