Appeal No. 2000-1841
Application 09/016,738
the frame of a work machine (e.g., a wheel loader) without
unduly
obstructing the view of the work area from the cab of the
machine. Representative claim 1 reads as follows:
1. A linkage assembly for connecting an implement to a
frame of a work machine, comprising:
a box-boom lift arm having a frame end portion and an
implement end portion, wherein (i) said frame end portion is
pivotally couplable to said frame, (ii) said implement end
portion is pivotally couplable to said implement, and (iii)
said frame end portion includes a first extension and a second
extension spaced apart from each other so as to define a first
lever space therebetween;
a lift cylinder having a frame end and a lift arm end,
wherein (i) said frame end is pivotally couplable to said
frame, and (ii) said lift arm end is pivotally coupled to said
box boom lift arm;
a rear tilt link having a first end and a second end,
wherein said first end is pivotally couplable to said frame;
a rear tilt lever having a cylinder end and a link end,
wherein (i) said link end is pivotally coupled to said second
end of said rear tilt link, (ii) said rear tilt lever is
pivotally coupled to said box boom lift arm at a location
which is interposed between said cylinder end and said link
end, and (iii) said rear tilt lever extends through said first
lever space; and
a tilt cylinder having a lever end and an implement end,
wherein (i) said lever end is pivotally coupled to said
cylinder end of said rear tilt lever, and (ii) said implement
end is mechanically couplable to said implement.
THE PRIOR ART
The references relied on by the examiner as evidence of
obviousness are:
2
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