Appeal 2007-4073
Application 10/739,417
1 A preferred embodiment plunger is illustrated in Figs. 41 and
2 42. In Figs. 41 and 42, the upper barrel, 401, and lower barrel,
3 402, are slidably engaged with the upper barrel interior to the
4 lower barrel in use. Secured to the lower extent of the upper
5 barrel, preferably by friction fit is a unidirectional seal
6 assembly. The unidirectional seal assembly comprises a
7 unidirectional seal, 407, mounted on a support post, 408, which
8 is forcibly inserted into a void of the upper barrel (not shown).
9 The support post, 408, is specifically shaped to have a bevel
10 and lip such that it can be force fit into a void and only removed
11 with difficulty. A disk, 406, receives the support post, 408, and
12 is situated between the unidirectional seal, 407, and upper
13 barrel, 401. The unidirectional seal, 407, engages with the
14 interior wall of the lower barrel, 402. When the upper tube is
15 drawn away from the lower end of the lower tube the
16 unidirectional seal is sufficiently pliable to flex and disengage
17 with the inner wall of the lower barrel thereby eliminating any
18 pressure decrease in the chamber. It is most preferred that the
19 unidirectional seal be pliable enough that water is drawn up into
20 the lower tube by no more than one inch. It is more preferred
21 that the unidirectional seal be pliable enough that water is
22 drawn up into the lower tube by no more than one-half inch.
23 When the upper tube is forced downward the disk, 406,
24 prohibits the unidirectional seal, 407, from flexing thereby
25 forming an air tight seal between the unidirectional seal, 407,
26 and interior wall of the lower tube.
27
28 (‘417 Specification, ¶ 88).
29
30 4) The ‘417 specification claims benefit of U.S. Application 10/436,515
31 filed May 13, 2003. (‘417 Specification, ¶ 1).
32
33 5) The oath for the ‘417 specification claims benefit of U.S. Application
34 10/436,515 filed May 13, 2003. (‘417 Oath, p. 1).
35
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Last modified: September 9, 2013