Aeronautics and astronautics – Aircraft structure – Details
Patent
1988-04-11
1990-10-23
Peters, Jr., Joseph F.
Aeronautics and astronautics
Aircraft structure
Details
411373, 411431, 411103, 2441293, 244132, F16B 3704, B64C 112
Patent
active
049645943
ABSTRACT:
A fastening combination adapted for quickly and efficiently connecting a first structure to a second structure using a single tool (like a screwdriver) and from just one side of the two structures. The fastening combination (which may be called a "blind" fastener) is particularly useful in the aircraft industry for installing a transparency such as a canopy or window to the airframe of some plane. A transparency may be removably connected to the airframe with a plurality of internally threaded members (or sleeves) and mating fastening bolts. The sleeves are loosely mounted in a plurality of fastener housings that can be permanently installed near an edge of the transparency. A means is provided for achieving a mechanical connection between each sleeve and an associated housing in such a way that torque applied by the fastening bolt to the sleeve will be resisted by the housing--and in turn by the transparency (or any other mounting structure to which the housing is anchored). This mechanical construction preferably includes an interlocking combination of a recessed shoulder on the housing and a protuberance on the sleeve.
The hollow, cylindrical housing of each blind fastener has a top and a bottom, and the housing is counterbored so as to provide a transversely extending shoulder therein. The sleeve may be selectively inserted into the housing, with the sleeve having a radially extending lip at one end that prevents the sleeve from passing all the way through the housing.
A cap is adapted to be inserted into the housing top, after the sleeve has been inserted therein. The cap is preferably somewhat resilient and it is sized so that it fits tightly into the top of the fastener, so that it will be effective to inhibit the entrance of contaminants and the like into the fastener. The cap ideally has what may be described as an aerodynamically smooth outer surface; and when the cap is installed into the housing top, said outer surface lies in a plane which is established by the top end of the housing.
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Corl Rodney
McHugh Charles W.
Peters Jr. Joseph F.
Texstar, Inc.
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