Appeal No. 2002-1720 Page 3
Application No. 09/100,494
a weed cutter head having means for attachment to a
weed trimmer, wherein the weed cutter head includes first
recess means for receiving U-shaped blades and second
recess means for receiving nails in a manner which allows
the nails to trim weeds;
U-shaped blades receivable in the first recess means;
and
nails receivable in the second recess means.
Lee, the examiner’s jumping off point in the obviousness rejections, discloses a
cutting attachment for use in cutting vegetation comprising a one-piece rigid body or
hub 42 provided with recesses for receiving a plurality of cutting blades 121 formed of
elongate flat planar bodies 122 of a high-impact plastic and additional cutting elements
in the form of six cutting strings 161 formed by three elongate flexible cutting lines 162
made from a suitable material such as high-impact plastic. As illustrated in Figure 1,
the cutting strings 161 are held generally in a U-shape. Lee lacks nails as recited in
claim 11.
Fisher discloses a cutter disc assembly for a rotary lawn mower comprising a
cutter disc 20 provided with evenly spaced openings 27, 28, 29 and grooves 37, 38, 39
in alignment with the openings for receiving outwardly extending cutter pins 30. The
cutter pins are formed of durable, abrasion resistant plastic such as nylon, with each pin
including a head 31, a shank 32 and “a stiffly resilient tip portion 33 terminating in an
outer tip 34" (column 3, lines 28-31). The grooves 37, 38, 39 have curved outwardly
flaring rear walls 42 of increasing curvature. The rear wall of each groove serves as a
backstop for the shank of the pin as the tip portion of the pin strikes an obstruction,
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