Article dispensing – Plural sources – stacks or compartments – With discharge means for each source
Reexamination Certificate
1998-10-23
2001-03-06
Skaggs, H. Grant (Department: 3651)
Article dispensing
Plural sources, stacks or compartments
With discharge means for each source
C221S258000, C221S31200B, C221S268000, C221S156000, C227S109000, C227S116000, C227S119000, C227S135000
Reexamination Certificate
active
06196414
ABSTRACT:
TECHNICAL FIELD OF INVENTION
This invention relates generally to fastener delivery systems and, more particularly, to a fastener injector 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 injector system that provides increased fastener orientation control. The present invention provides an improved fastener injector system that addresses shortcomings of prior fastener injector systems and increases fastener orientation control.
According to one embodiment of the invention, a fastener injector includes a receiver operable to receive a plurality of different sizes and types of fasteners in a desired orientation. The injector also includes an injector blade operable to deliver the fasteners in the desired orientation from the receiver to a fastener installation device.
According to another embodiment of the invention, a method for delivering a plurality of different sizes and types of fasteners to a fastener installation device includes delivering the fasteners in a desired orientation to a receiver using a plurality of tubes. The method also includes transferring the fasteners in the desired orientation from the receiver to the fastener installation device using an injector blade.
The invention provides several technical advantages. For example, in one embodiment of the invention, receiving and maintaining a fastener in a desired orientation by the injector provides greater efficiency than prior fastener injectors by decreasing the amount of time required to manipulate the fastener into an acceptable installation orientation. In the same embodiment, the fastener injector provides greater flexibility than prior fastener injectors 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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PCT Search Report dated Sep. 6, 2000.
Ferenczi Laszlo
Turner Mark A.
Woods James E.
Baker & Botts L.L.P.
Skaggs H. Grant
Vought Aircraft Industries, Inc.
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