Static structures (e.g. – buildings) – Facer held by stiffener-type frame – Interkeyed edge configurations of adjacent facers cooperate...
Reexamination Certificate
1998-12-21
2001-01-09
Friedman, Carl D. (Department: 3627)
Static structures (e.g., buildings)
Facer held by stiffener-type frame
Interkeyed edge configurations of adjacent facers cooperate...
C052S762000, C052S764000, C052S773000, C052S775000, C052S579000, C052S581000, C052S588100
Reexamination Certificate
active
06170223
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a panel assembly, and more particularly, relates to a panel assembly having a stringer and elongated sheet panels clampingly secured to the stringer.
2. Description of the Prior Art
A panel assembly is disclosed in the Japanese Patent Publication No. 46-3434.
The conventional panel assembly comprises a stringer
1
and a plurality of sheet panels
2
, as shown in
FIGS. 1 and 2
.
The stringer
1
is formed of a plate of aluminum alloy, for example, by roll forming in a predetermined figure and bent so as to have a U-shaped cross-section as shown in FIG.
2
. The stringer
1
has projections
3
each having convex portions
4
at both sides thereof and recesses
5
each having concave portions
6
at both sides thereof. Each of said projections
3
and each of said recesses
5
are arranged alternately with a desired interval on the top of each of side walls of the stringer
1
.
Each of said sheet panels
2
is formed of a baking finished plate of aluminum alloy or plastic and has curved portions
7
at both sides thereof.
A first sheet panel
2
facing upward is clampingly secured to the recess
5
formed between the projections
3
of the stringer
1
and a second sheet panel
2
facing downward is put on the projection
3
of the stringer
1
, so that the two curved portions
7
of the second panel element
2
are hooked around the two curved portions
7
of the first and third sheet panel
2
clamped in the recesses
5
to form a panel assembly.
As stated above, in the conventional panel assembly, it is necessary to arrange the panel elements
2
facing upward and facing downward alternately and to bring them into engagement with the projections
3
and recesses
5
of the stringer
1
, respectively, and accordingly the work becomes hard and the panel assembly becomes expensive.
SUMMARY OF THE INVENTION
An object of the present invention is to obtain a panel assembly comprising a stringer, a plurality of sheet panels each having a curved portion extending downward at one side thereof and a curved portion extending upward at the other side thereof, and an end sheet panel having bent portions extending downward at both sides thereof, said stringer having on the top thereof a plurality of panel engaging portions adjacent to one another and an end panel engaging portion located at the end portion thereof, each of said panel engaging portions having an upstream side convex portion, around which the curved portion of the sheet panel extending downward is hooked, a downstream side concave portion, into which the curved portion of the sheet panel extending upward is fitted, and a planar portion extending from said upstream side convex portion to said downstream side concave portion, and said end panel engaging portion of the stringer having curved edges at both ends thereof, around which the bent portions of the end sheet panel are hooked, respectively.
Another object of the present invention is to obtain a panel assembly comprising a stringer, and a plurality of sheet panels each having a curved portion extending downward at one side thereof and a curved portion extending upward at the other side thereof, said stringer having on the top thereof a plurality of panel engaging portions adjacent to one another, each of said panel engaging portions having an upstream side convex portion, around which the curved portion of the sheet panel extending downward is hooked, a downstream side concave portion, into which the curved portion of the sheet panel extending upward is fitted, and a planar portion extending from said upstream side convex portion to said downstream side concave portion, and an upper portion of said concave portion of the panel engaging portion having a groove, into which a tip end of said curved portion of the sheet panel extending upward Is fitted.
Further object of the present invention is to obtain a panel assembly comprising a stringer, a plurality of sheet panels each having a curved portion extending downward at one side thereof and a curved portion extending upward at the other side thereof, and an end sheet panel having bent portions extending downward at both sides thereof, said stringer having on the top thereof a plurality of panel engaging portions adjacent to one another, and an end panel engaging portion located at the end portion thereof, each of said panel engaging portions having an upstream side convex portion, around which the curved portion of the sheet panel extending downward is hooked, a downstream side concave portion, into which the curved portion of the sheet panel extending upward is fitted, and a planar portion extending from said upstream side convex portion to said downstream side concave portion, said end panel engaging portion of the stringer having curved edges at both ends thereof, around which the bent portions of the end sheet panel are hooked, respectively, and an upper portion of said concave portion of the panel engaging portion having a groove, into which a tip end of said curved portion of the sheet panel extending upward is fitted.
The plurality of sheet panels include at least one sheet panel different in width from the other sheet panels.
The planar portion of the panel engaging portion of the stringer is inclined downward from said upstream side convex portion to said downstream side concave portion.
At least one panel engaging portion of the stringer is engaged with no sheet panel.
The foregoing and other objects and features of the present invention will be further described with reference to the accompanying drawings by way of example according to the present invention. The detailed description and drawings are merely illustrative rather than limiting, the scope of the intention being defined by the appended claims and equivalents thereof.
REFERENCES:
patent: 2859494 (1958-11-01), Hull
patent: 2888983 (1959-06-01), Toti
patent: 3242626 (1966-03-01), Blok
patent: 3313075 (1967-04-01), Buchmeier
patent: 3336705 (1967-08-01), Vecchiarelli et al.
patent: 3347009 (1967-10-01), Meddick
patent: 3410043 (1968-11-01), Rijnders
patent: 3412516 (1968-11-01), Lindstrom
patent: 3548556 (1970-12-01), Vermeulen
patent: 4134244 (1979-01-01), Sjolander
patent: 4833839 (1989-05-01), Kurose
patent: 4964257 (1990-10-01), Kurose
patent: 1022666 (1966-03-01), None
patent: 46-3434 (1971-01-01), None
Dorsey Dennis L.
Friedman Carl D.
Gomeigaisha Kurose & Co.
Nilles & Nilles SC
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