Appeal No. 2002-0588
Application No. 08/566,206
a ferromagnetic plunger disposed within the bore and slidable
therein parallel to the bore axis, the plunger having a first end face and a
second end face;
a first permanent magnet positioned outside of the bore and in
facing relation to the first end face of the plunger along the bore axis, the
first permanent magnet attracting the plunger thereto;
a second permanent magnet positioned outside of the bore and in
facing relation to the second end face of the plunger along the bore axis,
the second permanent magnet attracting the plunger thereto,
the plunger being slidable in the bore between a first position with the first
end face adjacent to the first permanent magnet and a second position
with the second end face adjacent to the second permanent magnet; and
a bipolar electrical DC power supply operatively connected to the
electromagnet through a sense switch, whereby a polarity of the
electromagnet may be reversed by operation of the sense switch,
the plunger being retained adjacent to one of the permanent magnets
when the electromagnet is not energized.
The prior art of record relied upon by the examiner in rejecting the appealed
claims is as follows:
Knutson 4,127,835 Nov. 28, 1978
Ueda et al. (Ueda) 4,288,771 Sep. 8, 1981
Matsumoto et al. (Matsumoto) 4,422,060 Dec. 20, 1983
Yamamoto 4,755,782 Jul. 5, 1988
Philips, N. V. 633786 Feb. 10, 1962
(Italian patent)
Claims 1, 2, 4 and 6 stand rejected under 35 U.S.C. § 103 as being unpatentable
over Knutson in view of Philips. Claims 3 and 5 stand rejected under 35 U.S.C. § 103
as being unpatentable over Knutson and Philips further in view of Matsumoto. Claim 9
2
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