Appeal No. 2001-0735 Page 6
Application No. 09/135,390
1596, 1598 (Fed. Cir. 1988) and In re Lintner, 458 F.2d 1013,
1016, 173 USPQ 560, 562 (CCPA 1972).
The teachings of the Admitted Prior Art are adequately
summarized on page 3 of the answer.
Osada's invention is related to an electromagnetic
reciprocating pump, and particularly to an electromagnetic
reciprocating pump which enables the piston drive section to be
cooled with a simple structure and the pump to be manufactured
at a low cost. An inlet port for introducing the fluid is
provided so as to open to the side of the initial position of
the piston biased by a spring, the main shaft is formed into a
hollow cylinder and the inside and outside of the casing
communicate with each other through the central through hole of
the hollow main shaft and the inlet port, and the piston is
provided with suction ports and suction valves for sucking the
fluid into the pressure chamber, whereby the fluid introduced
into the casing can be guided to the rear part of the casing
through the internal passage of the hollow main shaft,
thereafter caused to pass by the electromagnet and armature,
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