Static structures (e.g. – buildings) – Composite prefabricated panel including adjunctive means – Sandwich or hollow with sheet-like facing members
Patent
1983-06-06
1986-03-25
Friedman, Carl D.
Static structures (e.g., buildings)
Composite prefabricated panel including adjunctive means
Sandwich or hollow with sheet-like facing members
52704, E04C 516
Patent
active
045774501
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The invention relates to floor fastening systems providing waterproof joints for use around entry doors and galleys in aircraft and which allow floor panel fastener access and panel removal from above the floor.
2. Background Art
Prior attempts to fasten floor panels in aircraft galley and entry areas so as to provide both ready access and waterproofing have compromised one or the other. Some present designs in passenger aircraft require bolting access from below the floor. For many aircraft this approach is inadequate due to equipment blockages under the floor.
In some previous models, floor panels were bolted in from above, and floor areas subject to moisture were vinyl covered. Because of the use of a substructure gasket, which allows lateral panel float under loads, these panels deflect under walking pressure, forcing the fastener heads up into the cover. Resulting cracks from the heads, being forced into the cover, eventually cause water leaks and corrosion of the substructure.
A search of the patent literature discloses a number of systems for securing panels to an aircraft floor.
One approach is illustrated in U.S. Pat. No. 3,892,099. This shows a tubular insert in the panel floor. The insert has an internal flange bonded to an innerface of a lower skin of a honeycomb panel and the insert has an external flange, bonded to the outerface of the upper skin of the panel. The invention uses a second insert 26, surrounding the said tubular insert 12. The invention also includes a plug 28 used in the tubular insert to provide a flush upper surface, the plug being in contact with a bolt head 20. When the bolt is to be released, the plug is removed with a pointed tool.
The following patents disclose systems somewhat related to that described above:
U.S. Pat. No. 2,140,709, granted Dec. 20, 1938, to K. W. Mauser;
U.S. Pat. No. 2,585,557, granted Feb. 12, 1952, to R. Kreimendahl;
U.S. Pat. No. 2,607,447, granted Aug. 19, 1952, to O. S. Tuttle;
U.S. Pat. No. 2,957,196, granted Oct. 25, 1960, to D. B. Kreider et al;
U.S. Pat. No. 2,961,760, granted Nov. 29, 1960, to R. E. Horton et al;
U.S. Pat. No. 2,967,593, granted Jan. 10, 1961, to K. V. Cushman;
U.S. Pat. No. 3,008,552, granted Nov. 14, 1961, to K. V. Cushman et al;
U.S. Pat. No. 3,017,673, granted Jan. 23, 1962, to J. Biris, Jr.;
U.S. Pat. No. 3,137,887, granted June 23, 1964, to A. J. Mannino et al;
U.S. Pat. No. 3,197,854, granted Aug. 3, 1965, to F. W. Rohe et al;
U.S. Pat. No. 3,526,072, granted Sept. 1, 1970, to J. R. Campbell;
U.S. Pat. No. 3,579,942, granted May 25, 1971, to J. M. Cole;
U.S. Pat. No. 3,662,805, granted May 16, 1972, to H. A. Sygnator;
U.S. Pat. No. 3,716,092, granted Feb. 13, 1973, to A. J. Serewicz;
U.S. Pat. No. 3,742,673, granted July 3, 1973, to Jennings et al;
U.S. Pat. No. 3,771,272, granted Nov. 13, 1973, to Mihaly et al;
U.S. Pat. No. 3,815,300, granted June 11, 1974, to B. R. Bain;
U.S. Pat. No. 3,884,006, granted May 20, 1975, to R. W. Dietlein;
U.S. Pat. No. 3,977,146, granted Aug. 31, 1976, to T. W. Wiley;
U.S. Pat. No. 4,056,878, granted Nov. 8, 1977, to G. E. Woodley;
U.S. Pat. No. 4,296,586, granted Oct. 27, 1981, to B. M. Heurteux; and
U.S. Pat. No. 4,341,053, granted July 27, 1982, to Dettfurth et al.
DISCLOSURE OF THE INVENTION
The invention is a floor panel fastening system, including inventive fasteners, for use in aircraft around entry doors and galleys which allows floor panel fastener access amd panel removal from above the floor. It includes bonded-in inserts for composite honeycomb floor panels, for example, allowing fastening through the panel from above, a silicone rubber hardened seal, for example, to waterproof each fastener above a bolt head, seals along the bolt shank, and float-clearance within the panel between the bolt head and the hardened seal.
The invention includes fastener assemblies for floor panel removal and inspection from above, wherein the assemblies include an upwardly open first tubular cup, the first cup having a central hole and in its bottom and hav
REFERENCES:
patent: 2140709 (1938-12-01), Mauser
patent: 2585557 (1952-02-01), Kreimendahl
patent: 2607447 (1952-08-01), Tuttle
patent: 2957196 (1960-10-01), Kreider et al.
patent: 2961760 (1960-11-01), Horton et al.
patent: 2967593 (1961-01-01), Cushman
patent: 3008552 (1961-11-01), Cushman et al.
patent: 3017673 (1962-01-01), Biris, Jr.
patent: 3137887 (1964-06-01), Mannino et al.
patent: 3197854 (1965-08-01), Rohe et al.
patent: 3510916 (1970-05-01), Phelan
patent: 3526072 (1970-09-01), Campbell
patent: 3579942 (1971-05-01), Cole
patent: 3662805 (1972-05-01), Sygnator
patent: 3716092 (1973-02-01), Serewicz
patent: 3742673 (1973-07-01), Jennings et al.
patent: 3771272 (1973-11-01), Mihaly et al.
patent: 3815300 (1974-06-01), Bain
patent: 3884006 (1975-05-01), Dietlein
patent: 3892099 (1975-07-01), Worgan et al.
patent: 3977146 (1976-08-01), Wiley
patent: 4056878 (1977-11-01), Woodley
patent: 4296586 (1981-10-01), Heurteux
patent: 4341053 (1982-07-01), Dettfurth et al.
Friedman Carl D.
Heberer Eugene O.
The Boeing Company
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