Appeal No. 2004-0893
Application No. 09/124,310 Page 2
1. A control unit for a control unit guided
industrial truck, comprising:
control elements mounted on the control unit for
controlling the industrial truck;
a circuit board mounted within the control unit;
at least two signal generators mounted on the
circuit board for the generation of electrical control
signals;
a membrane mounted within the control unit between
the control elements and the signal generators;
at least one electrically conductive layer on the
membrane, wherein the control elements are engageable
with the membrane to have the at least one electrically
conductive layer be electronically connectable to
respective signal generators, wherein the at least one
electrically conductive layer forms membrane switches
for the signal generators.
21. A towbar head for a towbar guided industrial
truck, comprising:
control elements mounted on the control unit for
controlling the industrial truck;
a circuit board mounted within the control unit;
at least two signal generators mounted on the
circuit board for the generation of electrical control
signals;
a membrane mounted within the control unit between
the control elements and the signal generators;
at least one electrically conductive layer on the
membrane, wherein the control elements are engageable
with the membrane to have the at least one electrically
conductive layer be electronically connectable to
respective signal generators, wherein the at least one
electrically conductive layer forms membrane switches
for the signal generators.
The prior art references of record relied upon by the
examiner in rejecting the appealed claims are:
Itoh 4,308,439 Dec. 29, 1981
DeVolpi 5,675,309 Oct. 07, 1997
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