Appeal No. 2005-0841
Application No. 08/230,083
4. Fig. 1 is a cross-sectional view of the assembly 1
(col 2, lines 59-61).
5. With reference to Fig. 1, the assembly 1 comprises
a stable and relatively rigid outer housing 3 to which is
fastened (through at least one clamping device 18, 19) a thin and
somewhat more light-weight inner frame 4 (col. 3, lines 25-28).
6. Between the outer housing 3 and the inner frame 4,
there is check valve element 5 (col. 3, lines 29-31).
7. As shown in Fig. 1, two check valve elements 5 are
included in assembly 1.
8. In Fig. 1, the check valve elements 5 are shown in
a "closed" position (col. 3, lines 36-37).
9. When the check valve elements 5 are in a closed
position, they rest under their own weight under the force of
gravity against an oblique grid 11 formed on the outer housing 3
(col. 3, lines 37-39) and air cannot flow through the assembly 1.
10. When air enters the assembly, check valve elements
5 are deflected upwardly and lifted away from oblique grid 11 and
engage horizontally extending stays 9 of inner frame 4 (col. 3,
lines 39-44).
11. The patent indicates that air enters the assembly
"from the direction of the arrow" (col. 3, lines 40-41). No
arrow is apparent in the drawings, including Fig. 1.
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Last modified: November 3, 2007